Papers Published in Journals
-Research results below have been sorted by order of journals name.
-Sorry, some research results below have no English abstract.

March 2007

35000300
Characterization of thin-foil preformed plasmas for high-intensity laser plasma interactions
Sagisaka, Akito; Daido, Hiroyuki; Pirozhkov, A.; Ogura, Koichi; Orimo, Satoshi; Mori, Michiaki; Nishiuchi, Mamiko; Yogo, Akifumi; Kado, Masataka; Nakamura, Shu*; Iwashita, Yoshihisa*; Shirai, Toshiyuki*; Noda, Akira*; Nagatomo, Hideo*
Acta Physica Hungarica B 26(3-4), p.327-333(2006) ; (JAEA-J 01848)
 
35000301
Development of a two-color interferometer for observing wide range electron density profiles with a femtosecond time resolution
Sagisaka, Akito; Pirozhkov, A.; Daido, Hiroyuki; Fukumi, Atsushi*; Li, Z.*; Ogura, Koichi; Yogo, Akifumi; Oishi, Yuji*; Nayuki, Takuya*; Fujii, Takashi*; Nemoto, Koshichi*; Orimo, Satoshi; Takai, Mamiko; Hayashi, Yukio; Mori, Michiaki; Kado, Masataka; Nakamura, Shu*; Noda, Akira*; Choi, I. W.*; Sung, J. H.*; Ko, D.-K.*; Lee, J.*
Applied Physics B 84(3), p.415-419(2006) ; (JAEA-J 01849)
 
35000302
Tunnel magnetoresistance in Co nanoparticle/Co-C60 compound hybrid system
Sakai, Seiji; Yakushiji, Kei*; Mitani, Seiji*; Takanashi, Koki*; Naramoto, Hiroshi; Avramov, P.; Narumi, Kazumasa; Lavrentiev, V.; Maeda, Yoshihito
Applied Physics Letters 89(11), p.113118_1-113118_3(2006) ; (JAEA-J 01850)
 In this study, the first results are described on the spin-dependent transport in the Co-C60 hybrid film in which Co nanoparticles are dispersed in a matrix of the Co-C60 compound. It is found that the hybrid film shows significant tunnel magnetoresistance (MR) of a few 10 %, which is comparable to granular metal-insulator systems, under the small applied bias voltage. Additionally, it is found that the electrical conductivity and MR ratio are strongly influenced by the bias voltage and the MR ratio under the higher bias voltage reaches 80%, which is anomalously high in granular systems. The bias-dependent magnetotransport behaviours are surmised to be related to the electronic structure of the Co-C60 compound.
35000303
Innovative separation method for advanced spent fuel reprocessing based on tertiary pyridine resin
Ozawa, Masaki; Koyama, Shinichi; Suzuki, Tatsuya*; Fujii, Yasuhiko*
Czechoslovak Journal of Physics 56(Suppl.D), p.D579-D587(2006) ; (JAEA-J 01851)
 Radiochemical separation experiments have been performed in order to realize a novel reprocessing method based on ion-exchange technique. The newly synthesized soft-donor type tertiary pyridine resin was dedicated to the experiments, where highly irradiated mixed oxide fuel from the experimental fast reactor JOYO was used as a reference spent fuel. With a 3 step separation, pure Am and Cm were individually obtained as MA products, and 106Ru group, Lns with 137Cs (HLLW group) and Pu group were fractionated, respectively. The decontamination factor of 137Cs and trivalent lanthanides (155Eu, 144Ce) in the Am product exceeded 39,000 and 100,000, respectively. The decontamination factor for the mutual separation of 243Cm and 241Am was larger than 2200 for the Am product. Moreover, the content of 137Cs, trivalent lanthanides and 243Cm in Am product did not exceed 2 ppm. The tertiary pyridine resin method suggests a reality as a candidate separation system for an "advanced ORIENT process", where total separation, transmutation and utilization of An, LLFP and rare metal fission product (RMFP) were oriented.
35000304
The Azimuthal dependent oxidation process on Cu(110) by energetic oxygen molecules
Moritani, Kosuke; Okada, Michio*; Fukuyama, Tetsuya*; Teraoka, Yuden; Yoshigoe, Akitaka; Kasai, Toshio*
European Physical Journal D 38(1), p.111-115(2006) ; (JAEA-J 01852)
 We report a study on the oxidation process induced by a hyperthermal oxygen molecular beam (HOMB) on Cu(110) using X-ray photoemission spectroscopy in conjunction with a synchrotron radiation source. The oxidation process induced by energetic O2 beams on Cu(110), depending on the azimuthal angle of incidence, suggests that the -Cu-O- added row structure has a role in inhibiting adsorption as a steric obstacle for incident O2 molecules.
35000305
Diagnostics of relativistic runaway electrons in a tokamak plasma based on laser inverse Compton scattering
Kawano, Yasunori; Kondoh, Takashi; Hatae, Takaki
Europhysics Conference Abstracts (CD-ROM) 30I, 4p.(2006) ; (JAEA-J 01853)
 
35000306
Stabilization effects of wall and plasma rotation on resistive wall mode in JT-60U
Matsunaga, Go; Takechi, Manabu; Kurita, Genichi; Sakamoto, Yoshiteru; Koide, Yoshihiko; Isayama, Akihiko; Suzuki, Takahiro; Fujita, Takaaki; Aiba, Nobuyuki; Ozeki, Takahisa; Kamada, Yutaka; JT-60 Team
Europhysics Conference Abstracts (CD-ROM) 30I, 4p.(2006) ; (JAEA-J 01854)
 
35000307
Fast data acquisition system based on digital oscilloscopes for fluctuation measurements in a long pulse JT-60U tokamak plasma
Matsunaga, Go; Takechi, Manabu; Toi, Kazuo*
Fusion Engineering and Design 82(2), p.207-213(2007) ; (JAEA-J 01855)
 
35000308
Electrical and structural properties of YHx(x ˜3) under high pressure
Matsuoka, Takehiro*; Kitayama, Takayasu*; Shimizu, Katsuya*; Nakamoto, Yuki*; Kagayama, Tomoko*; Aoki, Katsutoshi; Oishi, Yasuo*; Takemura, Kenichi*
High Pressure Research 26(4), p.391-394(2006) ; (JAEA-J 01856)
 The electrical and structural properties of yttrium hydride YHx was studied by the in-situ measurements of the electrical resistance and X-ray diffraction up to 86 GPa. The electrical resistivity increased with applying pressure up to 10 GPa and showed a maximum which accompanied with the structural transition of metal lattice from hcp to fcc structure. In fcc phase the resistivity decreased significantly, however the value still remained larger by 4 orders of magnitude that that of pure yttrium metal. We could not confirm the insulator to metal transition up to 23 GPa. The resistivity showed another maximum in the large pressure region 40 ˜ 60 GPa without the structural phase transition of metal lattice.
35000309
Ratio of transverse diffusion coefficient to mobility of electrons in high-pressure xenon and xenon doped with hydrogen
Kobayashi, Shingo*; Hasebe, Nobuyuki*; Hosojima, Takehiro*; Ishizaki, Takeshi*; Iwamatsu, Kazuhiro*; Mimura, Mitsuteru*; Miyachi, Takashi*; Miyajima, Mitsuhiro*; Pushkin, K.*; Tezuka, Chikara*; Doke, Tadayoshi*; Kobayashi, Masanori*; Shibamura, Eido*; Ishizuka, Akihiro
Japanese Journal of Applied Physics, Part 1 45(10A), p.7894-7900(2006) ; (JAEA-J 01858)
 We have obtained the ratio of transverse diffusion coeffcient to mobility of electrons multiplied by the elementary charge, in Xe and Xe+H2 under electric fields at a higher pressure of 1 MPa in comparison with preceding experiments. The result shows that the density effect (non-linear effect) of the ratio in both of pure Xe and Xe+H2 is <15% below 1 MPa over the reduced electric field range from 0.08 to 0.6×10-17V·cm2. We also found that the diffusion of an electron swarm is suppressed by adding trace of hydrogen to high-pressure xenon gas. Discussion is made of Xe+H2 gas to a new γ-ray camera. Trace of hydrogen to high-pressure xenon gas. Discussion is made of Xe+H2 gas to a new γ-ray camera.
35000310
Generation of broadband mid-infrared pulses by noncollinear difference frequency mixing
Sugita, Akihiro; Yokoyama, Keiichi; Yamada, Hidetaka; Inoue, Norihiro*; Aoyama, Makoto; Yamakawa, Koichi
Japanese Journal of Applied Physics, Part 1 46(1), p.226-228(2007) ; (JAEA-J 01859)
 Generation of broadband mid-infrared (MIR) laser pulses by difference frequency mixing (DFM) is reported. Two-color femtosecond pulses from a Ti: Sapphire laser system is mixed in an AgGaS2 crystal utilizing a noncollinear phase matching scheme. The relative bandwidth of the generated MIR pulse has been measured to be 23 % to the central frequency, the broadest in DFM-based MIR sources reported so far. It is found that the type-I crystal can give broader phase matching range of spectrum than the type-II crystal within this scheme.
35000311
Structural studies of phase transitions in crystalline and liquid Halides (ZnCl2, AlCl3) under pressure
Brazhkin, V. V.*; Katayama, Yoshinori; Lyapin, A. G.*; Popova, S. V.*; Inamura, Yasuhiro*; Saito, Hiroyuki; Utsumi, Wataru
JETP Letters 82(11), p.713-718(2005) ; (JAEA-J 01860)
 The results of investigating the phase diagrams of ZnCl2 and AlCl3 halides, as well as the structure of the short range order of the corresponding melts under pressures up to 6.5 GPa, by the method of energy-dispersive X-ray diffraction are reported. When a ZnCl2 crystal is compressed, a phase transition occurs from the γ phase (HgI2 structure type) to the δ phase (distorted CdI2 structure, WTe2 type). The structural studies of the liquid state of ZnCl2 and AlCl3 indicate that the intermediate-range order decreases rapidly in the tetrahedral network of both melts as the pressure increases to 1.8 and 2.3 GPa for ZnCl2 and AlCl3, respectively. With further compression, the transitions in both melts occur with a change in the structure of the short-range order and with an increase in the coordination number. In this case, the transition in AlCl3 occurs at about 4 GPa and is a sharp first order transition, whereas the transition in ZnCl2 occurs more smoothly in a pressure range of 2-4 GPa with a maximum intensity near 3 GPa. Thus the AlCl3 and ZnCl2 compounds exemplify the existence of two phenomena, gradual decay of intermidiate-range structural correlations and a sharper liquid-liquid coordination transition.
35000312
Synthesis and characterization of oriented graphitelike B-C-N hybrid
Uddin, M. N.*; Shimoyama, Iwao; Baba, Yuji; Sekiguchi, Tetsuhiro; Nath, K. G. *; Nagano, Masamitsu*
Journal of Applied Physics 99(8), p.084902_1-084902_5(2006) ; (JAEA-J 01861)
 
35000313
Real-time X-ray observation of solidification from undercooled Si melt
Nagashio, Kosuke*; Adachi, Masayoshi*; Higuchi, Kensuke*; Mizuno, Akitoshi*; Watanabe, Masahito*; Kuribayashi, Kazuhiko*; Katayama, Yoshinori
Journal of Applied Physics 100(3), p.033524_1-033524_6(2006) ; (JAEA-J 01862)
 Grain refined microstructure is often obtained spontaneously in the solidification of metals and semiconductors from the undercooled melt without any external forces. Although it has been reported that the grain refinement is mainly caused by the fragmentation of the dendrites, the dynamic process of the fragmentation of dendrites has not been fully understood because the microstructure after the solidification has been analyzed. Here, we present a time-resolved 2- dimensional X-ray diffraction experiment on the solidification of Si from the undercooled melt. The number of diffraction spots observed at low undercoolings (Δ T<100K) did not increase at the plateau stage, while the diffraction pattern at medium undercoolings (100K<Δ T<200K) changed from the spots with the tail to rings with the lapse of time. Both this result and high speed video imaging suggested that the high-order arms of the dendrites mostly detached from the main stems because nucleation could not be expected at the melting point after recalescence. The several spots observed at low undercoolings drastically changed to rings at high undercoolings (Δ T>200K), which indicated the complete fragmentation of dendrite main stem as well as high-order arms. This complete fragmentation resulted in the grain refined microstructure.
35000314
Plasma generation using high-power millimeter-wave beam and its application for thrust generation
Oda, Yasuhisa*; Komurasaki, Kimiya*; Takahashi, Koji; Kasugai, Atsushi; Sakamoto, Keishi
Journal of Applied Physics 100(11), p.113307_1-113307_4(2006) ; (JAEA-J 01863)
 
35000315
Tunneling chemical reactions D+H2→DH+H and D+DH→D2+H in solid D2-H2 and HD-H2 mixtures; An Electron-spin-resonance study
Kumada, Takayuki
Journal of Chemical Physics 124(9), p.094504_1-094504_9(2006) ; (JAEA-J 01864)
 It has been predicted that, unlike classical thermally activated reactions, tunneling reactions have very large isotope effects; however, the effects are so large that they have not much been measured experimentally. The author succeeded in producing large amounts of D atoms enough for ESR measurement within 30 s, and used the technique for the study of tunneling reactions D + H2 → DH + H (1) and D + DH → D2 + H (2). Rate constant for the reaction (1) between neighboring D atom-H2 molecule pair was determined to be 1 × 10-2 s-1, whereas that for the reaction (2) between D-HD pair was to be 8 × 10-6 s-1. These values coincide with theoretical results by Truhler et al. and Takayanagi et al. within the factor of 10.
35000316
Selection of the alkylamino group introduced into the polymer chain grafted onto a porous membrane for the impregnation of an acidic extractant
Domon, Sayaka*; Asai, Shiho; Saito, Kyoichi*; Watanabe, Kazuo; Sugo, Takanobu*
Journal of Membrane Science 262(1-2), p.153-158(2005) ; (JAEA-J 01865)
 
35000317
Preparation of ETFE-based fuel cell membranes using UV-induced photografting and electron beam-induced crosslinking techniques
Chen, J.; Asano, Masaharu; Maekawa, Yasunari; Sakamura, Takahiro*; Kubota, Hitoshi*; Yoshida, Masaru
Journal of Membrane Science 283(1-2), p.373-379(2006) ; (JAEA-J 01866)
 A novel process comprising UV-induced photografting of styrene into poly(tetrafluoroethylene-co-ethylene) (ETFE) films in vapor and liquid phases, followed by electron beam-induced crosslinking has been developed for preparing polymer electrolyte membranes. The significance of this process is that the photografted polystyrene chains can completely penetrate into the base ETFE film; the membranes show proton conductibility available for fuel cell applications. On one hand, the proton conductivity of the liquid-phase photografted electrolyte membranes is higher than the vapor-phase one, and is anisotropic in the surface and thickness directions. On the other hand, radiation-induced crosslinking greatly improves the chemical stability of the resultant fuel cell membranes, and maintains the surface concentration of sulfonic acid groups at its higher level.
35000318
A Continuous flow system for in-situ XANES measurements of change in oxidation state of Ce(III) to Ce(IV)
Onuki, Toshihiko; Yoshida, Takahiro*; Nankawa, Takuya; Ozaki, Takuo; Kozai, Naofumi; Sakamoto, Fuminori; Suzuki, Yoshinori*; Francis, A. J.*
Journal of Nuclear and Radiochemical Sciences 6(1), p.65-67(2005) ; (JAEA-J 01867)
 
35000319
Associations of Eu(III) with Gram-Negative Bacteria, Alcaligenes faecalis, Shewanella putrefaciens, and Paracoccus denitrificans
Ozaki, Takuo; Kimura, Takaumi; Onuki, Toshihiko; Francis, A. J.*
Journal of Nuclear and Radiochemical Sciences 6(1), p.73-76(2005) ; (JAEA-J 01868)
 
35000320
Measurement of effective capture cross section of americium-243 for thermal neutrons
Ota, Masayuki; Nakamura, Shoji; Harada, Hideo; Fujii, Toshiyuki*; Yamana, Hajimu*
Journal of Nuclear Science and Technology 43(12), p.1441-1445(2006) ; (JAEA-J 01869)
 
35000321
In-situ measurement of UO22+ concentration in molten NaCl-2CsCl by differential pulse voltammetry
Nagai, Takayuki; Uehara, Akihiro*; Fujii, Toshiyuki*; Shirai, Osamu*; Yamana, Hajimu*
Journal of Nuclear Science and Technology 43(12), p.1511-1516(2006) ; (JAEA-J 01870)
 In order to assess the applicability of Differential Pulse Voltammetry technique to the In-situ measurement of UO22+ concentration in the oxide electro-winning process, DPV measurements for UO2Cl2 in molten NaCl-2CsCl were studied. DPV measurement of UO22+ in NaCl-2CsCl at 923 K, with a set of optimized parameters (potential sweep rate -0.1 V/s, pulse cycle 0.1 s, pulse width 10 ms, and pulse potential height 50 mV), showed a clear current peak at -0.9 V vs. Cl2/Cl-, and it was attributed to the reduction of UO22+ to UO2+. The relation between the current peak height and the analytical concentration of the UO22+ showed good proportionality in the concentration region up to 0.06 mol/l, and the applicability of UO22+ concentration measurement by DPV was confirmed up to 0.4 mol/l. In order to assess the interference by the coexisting fission product elements to the measurement of UO22+ concentration, DPV measurements of UO22+ concentration in molten NaCl-2CsCl containing PdCl2, NdCl3, SmCl3, and CeCl3 were performed also. Even before removing Pd, the current peak at -0.9 V vs. Cl2/Cl- by the reduction of UO22+ to UO2+ was found to be distinguishable from the reduction currents of Pd2+ to Pd at -0.7 V vs. Cl2/Cl-. As a result, the applicability of DPV measurement technique to the In-situ monitoring of UO22+ concentration in oxide electro-winning method is proposed.
35000322
Uncertainty analyses of neutron cross sections for Nitrogen-15, Lead-206,207,208, Bismuth-209, Plutonium-238, Americium-242m, and Curium-244 in JENDL-3.3
Shibata, Keiichi; Nakagawa, Tsuneo
Journal of Nuclear Science and Technology 44(1), p.1-9(2007) ; (JAEA-J 01871)
 Covariances of neutron cross sections for 15N, 206,207,208Pb, 209Bi, 238Pu, 242mAm and 244Cm contained in JENDL-3.3 have been evaluated for the design of accelerator-driven transmutation systems. The covariances were obtained from the experimental data and model calculations on which the JENDL-3.3 data were based. The physical quantities for which covariances were deduced are the elastic scattering cross section of 15N, the inelastic scattering cross sections of 206,207,208Pb and 209Bi, and the fission and capture cross sections of 238Pu, 242mAm and 244Cm. Uncertainties in the resolved resonance parameters were estimated for 238Pu, 242mAm and 244Cm. The results were compiled in the ENDF-6 format and merged with the JENDL-3.3 data.
35000323
Calculation of neutron nuclear data on calcium isotopes for JENDL-4
Shibata, Keiichi
Journal of Nuclear Science and Technology 44(1), p.10-20(2007) ; (JAEA-J 01872)
 Neutron nuclear data on 40, 42, 43, 44, 46, 48Ca have been calculated for the evaluated nuclear data library JENDL-4. Simultaneously calculated are the total, elastic and inelastic scattering, (n,p), (n,α), (n,γ), (n,2n), (n,3n), (n,np) and (n,nα) reaction cross sections, the angular distributions of emitted neutrons, and the energy distributions of emitted particles and γ-rays. The statistical model was applied to calculate these quantities. Pre-equilibrium and direct-reaction processes were taken into account in addition to the compound process. It is found that the present calculations are almost consistent with available experimental data and much better than the JENDL-3.3 evaluation. In particular, the measured γ-ray production data are well reproduced by the present calculations.
35000324
Thermal neutron capture cross sections of Zirconium-91 and Zirconium-93 by prompt γ-ray spectroscopy
Nakamura, Shoji; Harada, Hideo; Raman, S.*; Koehler, P. E.*
Journal of Nuclear Science and Technology 44(1), p.21-28(2007) ; (JAEA-J 01873)
 
35000325
Retrospective estimation of the spatial dose distribution and the number of fissions in criticality accident using area dosimeters
Sono, Hiroki; Ono, Akio; Kojima, Takuji; Yamane, Yoshihiro*
Journal of Nuclear Science and Technology 44(1), p.43-53(2007) ; (JAEA-J 01874)
 A practical method is proposed for retrospective estimation of the spatial dose distribution and the number of fissions in a typical criticality accident. In this method, two kinds of low-fading and tissue-equivalent dosimeters are used as area dosimeters: an alanine dosimeter and a thermoluminescence dosimeter made of enriched lithium tetra borate. The procedure of the method consists of four parts: (1) dosimetry using area dosimeters (2) search for the center of the radiation source, (3) estimation of the spatial dose distribution, and (4) estimation of the number of fissions. Dosimetry of criticality accident situations simulated at the TRACY facility demonstrates the practicability of the method. Although a post-hoc analysis in principle, this method gives useful information on the magnitude and hazard level of the accident to determine the strategy of radiation emergency medicine and other post-accident measures if the area dosimeters are retrieved immediately after the accident.
35000326
Gap width effect on critical power based on tight-lattice 37-rod bundle experiments
Tamai, Hidesada; Kureta, Masatoshi; Liu, W.; Sato, Takashi; Onuki, Akira; Akimoto, Hajime
Journal of Nuclear Science and Technology 44(1), p.54-63(2007) ; (JAEA-J 01875)
 Since most critical power data have been collected for tube, annulus, or BWR geometries under BWR flow conditions, there is a lack of the critical power data for very tight triangular lattice bundles under low mass velocity flow conditions that is indispensable for the thermal-hydraulic design of the Innovative Water Reactor for Flexible Fuel Cycle (FLWR). Large-scale thermal-hydraulic experiments using two tight-lattice 37-rod bundle test sections with 1.0 and 1.3 mm gaps respectively were therefore carried out within the range of 2-9 MPa in pressure and 150-1200 kg/(m2s) in mass velocity. It was confirmed that the fundamental characteristics of the flow parameter impact on critical power are similar between 1.0 and 1.3mm gaps. Then, the gap width effect was discussed using the relationship between critical quality and mass velocity. No significant differences are recognized under high mass velocity conditions (>700 kg/(m2s)), whereas the critical quality in the 1.0mm gap experiments tends to be lower under low mass velocity conditions (< 700 kg/(m2s)) and the difference is less than 10 %.
35000327
Structure of exotic nuclei in the sd-pf shell region and its relation to the effective interaction
Utsuno, Yutaka; Otsuka, Takaharu*; Mizusaki, Takahiro*; Homma, Michio*
Journal of Physics; Conference Series 49, p.126-131(2006) ; (JAEA-J 01876)
 
35000328
Characterization of preformed plasmas using a multi-dimensional hydrodynamic simulation code in the study of high-intensity laser-plasma interactions
Sagisaka, Akito; Utsumi, Takayuki*; Daido, Hiroyuki; Ogura, Koichi; Orimo, Satoshi; Takai, Mamiko; Hayashi, Yukio; Mori, Michiaki; Yogo, Akifumi; Kado, Masataka; Fukumi, Atsushi*; Li, Z.*; Nakamura, Shu; Noda, Akira*; Oishi, Yuji*; Nayuki, Takuya*; Fujii, Takashi*; Nemoto, Koshichi*; Bulanov, S. V.; Esirkepov, T. Z.; Pirozhkov, A.; Wakabayashi, Daisuke*; Morita, Toshimasa*; Yamagiwa, Mitsuru
Journal of Plasma Physics 72(6), p.1281-1284(2006) ; (JAEA-J 01877)
 
35000329
Distinct modes of cell death by ionizing radiation observed in two lines of feline T-lymphocytes
Kakizaki, Takehiko; Hamada, Nobuyuki*; Wada, Seiichi*; Funayama, Tomoo; Sakashita, Tetsuya; Hodatsu, Tsutomu*; Sano, Tadashi*; Natsuhori, Masahiro*; Kobayashi, Yasuhiko; Ito, Nobuhiko*
Journal of Radiation Research 47(3-4), p.237-243(2006) ; (JAEA-J 01878)
 
35000330
Progress of neutral beam injection system on JT-60U for long pulse operation
Ikeda, Yoshitaka; NBI Heating Group; NCT Design Team
Journal of the Korean Physical Society 49, p.S43-S47(2006) ; (JAEA-J 01879)
 There are two type of NBI systems on JT-60U. One is the positive ion-based NBI (P-NBI) to inject the beam energy of 80-85 kV. The other is the negative ion-based NBI (N-NBI) at the beam energy more than 350 keV. Recently the pulse duration of NBI system was required to extend up to 30 sec so as to study long pulse plasmas. The four P-NBI units, which tangentially inject neutral beam to plasma, were modified to extend the pulse duration up to 30 sec with 2 MW/unit at ˜ 85 keV. The seven P-NBI units, each of which perpendicularly injects for 10 sec, were conducted to operate in series for the total pulse duration of 30 sec. The ion source of the N-NBI unit was also modified to reduce the heat load of the grid for 30 sec operation. The pulse duration was extended up to 25 sec, ˜ 1 MW at the beam energy of 350keV. In the next step, further pulse extension of NBI up to 100 sec is planned for the modified JT-60U with superconducting coils (so called NCT). This paper reports the recent progress of the NBI system on JT-60U and the design study of the upgraded NBI system for NCT.
35000331
Possible unconventional superconductivity and magnetism in CePt3Si probed by muon spin rotation and relaxation
Higemoto, Wataru; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika; Oishi, Kazuki; Ito, Takashi; Koda, Akihiro*; Saha, S. R.*; Kadono, Ryosuke*
Journal of the Physical Society of Japan 75(12), p.124713_1-124713_5(2006) ; (JAEA-J 01880)
 Superconducting and magnetic properties of the heavy fermion superconductor CePt3Si were studied by means of the μSR method. The muon Knight shift is invariant on passing the temperature through Tc down to 20 mK at 17 kOe, indicating that the local spin susceptibility does not change in the superconducting state.
35000332
Finite-temperature phase transitions in quasi-one-dimensional molecular conductors
Seo, Hitoshi; Motome, Yukitoshi*; Kato, Takeo*
Journal of the Physical Society of Japan 76(1), p.013707_1-013707_4(2007) ; (JAEA-J 01881)
 Phase transitions in 1/4-filled quasi-one-dimensional molecular conductors are studied theoretically on the basis of extended Hubbard chains including electron-lattice interactions coupled by interchain Coulomb repulsion. We apply the numerical quantum transfer-matrix method to an effective one-dimensional model, treating the interchain term within mean-field approximation. Finite-temperature properties are investigated for the charge ordering, the "dimer Mott" transition (bond dimerization), and the spin-Peierls transition (bond tetramerization). A coexistent state of charge order and bond dimerization exhibiting dielectricity is predicted in a certain parameter range, even when intrinsic dimerization is absent.
35000333
Magnetic and electrical properties in CePtSi3 without inversion symmetry in the crystal structure
Kawai, Tomoya*; Okuda, Yusuke*; Shishido, Hiroaki*; Thamizhavel, A.*; Matsuda, Tatsuma; Haga, Yoshinori; Nakashima, Miho*; Takeuchi, Tetsuya*; Hedo, Masato*; Uwatoko, Yoshiya*; Settai, Rikio*; Onuki, Yoshichika*
Journal of the Physical Society of Japan 76(1), p.014710_1-014710_6(2007) ; (JAEA-J 01882)
 We succeeded in growing a single crystal of CePtSi3 by the Sn-flux method. CePtSi3 is found to be an antiferromagnet with two transitions at 4.8 and 2.4 K. Magnetic easy direction was [100] direction with an ordered moment of 1.15 μB/Ce. The anisotropy is similar to that of CeIrSi3 in which the pressure-induced superconductivity was observed.
35000334
Killing of feline T-lymphocytes by γ-rays and energetic carbon ions
Kakizaki, Takehiko; Hamada, Nobuyuki*; Funayama, Tomoo; Sakashita, Tetsuya; Wada, Seiichi*; Hodatsu, Tsutomu*; Natsuhori, Masahiro*; Sano, Tadashi*; Kobayashi, Yasuhiko; Ito, Nobuhiko*
Journal of Veterinary Medical Science 68(12), p.1269-1273(2006) ; (JAEA-J 01883)
 
35000335
Analysis of the Chernobyl accident from 1:19:00 to the first power excursion
Mochizuki, Hiroyasu
Nuclear Engineering and Design 237(3), p.300-307(2007) ; (JAEA-J 01884)
 Many researchers have reported that the root cause of the Chernobyl accident has not been clarified still now. Since most of them discussed the accident without a precise thermal-hydraulic investigation, thermal-hydraulic calculations coupled with neutronic calculations have been done on the basis of the recorded result at the Chernobyl Unit 4. Calculation could trace plant parameters from 1:19:00 to the first power excursion. Reactivity slightly smaller than 1β by the positive scram is a possible direct cause of the accident, which acts as a trigger to increase the reactor power.
35000336
InSb cryogenic radiation detectors
Kanno, Ikuo*; Hishiki, Shigeomi*; Sugiura, Osamu*; Xiang, R.*; Nakamura, Tatsuya; Katagiri, Masaki
Nuclear Instruments and Methods in Physics Research A 568(1), p.416-420(2006) ; (JAEA-J 01885)
 
35000337
A Compact loop-type fast reactor without refueling for a remote area power source
Chikazawa, Yoshitaka; Okano, Yasushi; Konomura, Mamoru; Sawa, Naoki*; Shimakawa, Yoshio*; Tanaka, Toshihiko*
Nuclear Technology 157(2), p.120-131(2007) ; (JAEA-J 01886)
 A small reactor has a potential to be utilized as a power source applicable to diversified social needs and reduce capital risks. In remote sites where the population is small and plants can not be economically connected to a power grid, power sources without refueling whose capacities are lower than 50 MWe are required because fuel transfer cost is expensive in such sites. In the present study, a small sodium cooled core with 30 years lifetime has been developed and a simple plant system without refueling has been sketched. Dimensions of major components are determined to evaluate its economical potential. Transient analyses show that self actuated shutdown system (SASS) enhances the passive safety features to maintain the reactor integrity in anticipate transient without scram events.
35000338
Time-resolved small-angle neutron scattering study on soap-free emulsion polymerization
Motokawa, Ryuhei; Koizumi, Satoshi; Hashimoto, Takeji; Nakahira, Takayuki*; Annaka, Masahiko*
Physica B; Condensed Matter 385-386(1), p.780-782(2006) ; (JAEA-J 01887)
 A soap-free emulsion polymerization method was employed in an aqueous medium in order to synthesize an amphiphilic block copolymer of poly(N-isopropylacrylamide)-block-poly(ethylene glycol) (NE), where Poly(N-isopropylacrylamide) (PNIPA) was polymerized from the radically activated chain ends of poly(ethylene glycol) (PEG). As the polymerization proceeds, PNIPA block chains form micelle cores stabilized by PEG brush chains emanating therefrom. When this polymerization was employed at temperatures equal to or higher than 34°C, radical polymerization proceeds living-likely. To elucidate origins of the living nature, we carried out time-resolved ultra-small- and small-angle neutron scattering (USANS and SANS). USANS and SANS revealed that (1) from 15 to 60°C, polymerized NE forms micelle in the solution when molecular weight reaches to a critical molecular weight for micelle formation, and (2) as the temperature increases from 34°C, water and monomer content in the micelle core becomes less due to a lower critical solution temperature of PNIPA. These results indicate that low diffusivity of chain end radicals, compartmentalized in the solid-like micelle core, plays an important role to lead a quasi-living polymerization behavior.
35000339
Focusing and Polarized Neutron ultra-small-angle scattering spectrometer (SANS-J-II) at research reactor JRR3, Japan
Koizumi, Satoshi; Iwase, Hiroki; Suzuki, Junichi; Oku, Takayuki; Motokawa, Ryuhei; Sasao, Hajime*; Tanaka, Hirokazu; Yamaguchi, Daisuke; Shimizu, Hirohiko; Hashimoto, Takeji
Physica B; Condensed Matter 385-386(2), p.1000-1006(2006) ; (JAEA-J 01888)
 
35000340
Gamow-Teller decay of the T=1 nucleus 46Cr
Onishi, Takeo*; Gelberg, A.*; Sakurai, Hiroyoshi*; Yoneda, Kenichiro*; Aoi, Nori*; Imai, Nobuaki*; Baba, Hidetada*; Brentano, P. von*; Fukuda, Naoki*; Ichikawa, Yuichi*; Ishihara, Masayasu*; Iwasaki, Hironori*; Kameda, Daisuke*; Kishida, Takashi*; Lisetskiy, A. F.*; Ong, H. J.*; Osada, Mitsushi*; Otsuka, Takaharu*; Suzuki, Masaru*; Ue, Koji*; Utsuno, Yutaka; Watanabe, Hiroshi*
Physical Review C 72(2), p.024308_1-024308_7(2005) ; (JAEA-J 01889)
 
35000341
High spin structure and intruder configurations in 31P
Ionescu-Bujor, M.*; Iordachescu, A.*; Napoli, D. R.*; Lenzi, S. M.*; Marginean, N.*; Otsuka, Takaharu*; Utsuno, Yutaka; Ribas, R. V.*; Axiotis, M.*; Bazzacco, D.*; Bizzeti-Sona, A. M.*; Bizzeti, P. G.*; Brandolini, F.*; Bucurescu, D.*; Cardona, M. A.*; de Angelis, G.*; de Poli, M.*; Della Vedova, F.*; Farnea, E.*; Gadea, A.*; Hojman, D.*; Kalfas, C. A.*; Kr"oll, Th.*; Lunardi, S.*; Mart'inez, T.*; Mason, P.*; Pavan, P.*; Quintana, B.*; Rossi Alvarez, C.*; Ur, C. A.*; Vlastou, R.*; Zilio, S.*
Physical Review C 73(2), p.024310_1-024310_12(2006) ; (JAEA-J 01890)
 
35000342
Half-life of 184Re populated by the (γ,n) reaction from laser Compton scattering γ rays at the electron storage ring NewSUBARU
Hayakawa, Takehito; Miyamoto, Shuji*; Hayashi, Yukio; Kawase, Keigo*; Horikawa, Ken*; Chiba, Satoshi; Nakanishi, Kosuke*; Hashimoto, Hisanobu*; Ota, Takeshi*; Kando, Masaki; Mochizuki, Takayasu*; Kajino, Toshitaka*; Fujiwara, Mamoru
Physical Review C 74(6), p.065802_1-065802_5(2006) ; (JAEA-J 01891)
 We report a half-life of the ground state of 184Re populated by the 185Re(γ,n)184Re reaction with the Laser Compton scattering γ-rays generated through relativistic engineering. The γ-rays are provided at the electron storage ring NewSUBARU. The previous experiment using deuteron-induced reactions has yielded a recommended half-life of the 3- ground state of 184Re to be 38.0 ± 0.5 d, including a possible contribution from the 8+ isomer (T1/2 = 169 ± 8 d) of 184Re since the presence of the isomer was not known at that time. In contrast, the (γ,n) reaction has an advantage to selectively populate the ground state because this reaction does not bring large angular momentum. The measured half-life of 35.4 ± 0.7 d is shorter than the previous half-life by about 7%. This difference is crucial for applications using the activation method.
35000343
Probing the coulomb interaction of the unconventional superconductor PuCoGa5 by phonon spectroscopy
Raymond, S.*; Piekarz, P.*; Sanchez, J. P.*; Serrano, J.*; Krisch, M.*; Janousova, B.*; Rebizant, J.*; Metoki, Naoto; Kaneko, Koji; Jochym, P. T.*; Ole's, A. M.*; Parlinski, K.*
Physical Review Letters 96(23), p.237003_1-237003_4(2006) ; (JAEA-J 01892)
 The phonon dispersion curves of the superconductor PuCoGa5 were studied by inelastic X-ray scattering at room temperature. The experimental data agree well with ab initio lattice dynamics calculations. An accurate description of the phonon spectrum is obtained only when a local Coulomb repulsion U˜ 3 eV among 5f electrons is taken into account.
35000344
Direct numerical simulation on turbulent channel flow under a uniform magnetic field for large-scale structures at high reynolds number
Satake, Shinichi*; Kunugi, Tomoaki*; Takase, Kazuyuki; Ose, Yasuo*
Physics of Fluids 18(12), p.125106_1-125106_8(2006) ; (JAEA-J 01893)
 
35000345
New features in the computational infrastructure for nuclear astrophysics
Smith, M. S.*; Lingerfelt, E. J.*; Scott, J. P.*; Nesaraja, C. D.*; Chae, K.*; Koura, Hiroyuki; Roberts, L. F.*; Hix, W. R.*; Bardayan, D. W.*; Blackmon, J. C.*
Proceedings of Science (Internet) , 5p.(2006) ; (JAEA-J 01894)
 A Computational Infrastructure for Nuclear Astrophysics has been developed to streamline the inclusion of the latest nuclear physics data in astrophysics simulations. The infrastructure consists of a platform-indepedent suite of codes that are freely vailable online at nucastrodata.org. The newest features of, and future plans for, this software suite are give in.
35000346
Charge screening effect in the hadron-quark mixed phase
Endo, Tomoki*; Maruyama, Toshiki; Chiba, Satoshi; Tatsumi, Toshitaka*
Progress of Theoretical Physics 115(2), p.337-353(2006) ; (JAEA-J 01895)
 
35000347
Estimation of photon dose generated by a short pulse high power laser
Hayashi, Yukio; Fukumi, Atsushi*; Matsukado, Koji*; Mori, Michiaki; Kotaki, Hideyuki; Kando, Masaki; Chen, L.; Daito, Izuru; Kondo, Shuji; Kanazawa, Shuhei; Yamazaki, Atsushi; Ogura, Koichi; Nishiuchi, Mamiko; Kado, Masataka; Sagisaka, Akito; Nakamura, Shu; Li, Z.*; Orimo, Satoshi; Homma, Takayuki; Daido, Hiroyuki
Radiation Protection Dosimetry 121(2), p.99-107(2006) ; (JAEA-J 01896)
 The authors obtain a new equation to estimate the forward component of a photon dose which is generated through the interaction between a target and a short pulse high power laser. As the equation is quite simple, it is useful for calculating the photon dose. The equation shows that the photon dose is proportional to the electron temperature for the range of its temperature > 3 MeV, and proportional to square of the electron temperature for the range of its temperature < 3 MeV. The dose estimated with this method is roughly consistent with the result of Monte Carlo simulation. On someassumptions and corrections, it can reproduce experimental results obtained and the dose result calculated at other laboratories.
35000348
Extraction behavior of rutherfordium into tributylphosphate from hydrochloric acid
Haba, Hiromitsu*; Tsukada, Kazuaki; Asai, Masato; Toyoshima, Atsushi; Ishii, Yasuo; Tome, Hayato; Sato, Tetsuya; Nishinaka, Ichiro; Ichikawa, Takatoshi; Ichikawa, Shinichi; Nagame, Yuichiro; Sato, Wataru*; Matsuo, Keiji*; Kitamoto, Yusuke*; Tashiro, Yuki*; Shinohara, Atsushi*; Saito, Junko*; Ito, Maya*; Ikezawa, Takaaki*; Sakamaki, Masami*; Goto, Shinichi*; Kudo, Hisaaki*; Kikunaga, Hidetoshi*; Arai, Masato*; Kamataki, Shinji*; Yokoyama, Akihiko*; Akiyama, Kazuhiko*; Sueki, Keisuke*; Oura, Yasuji*; Sch"adel, M.*; Br"uchle, W.*; Kratz, J. V.*
Radiochimica Acta 95(1), p.1-6(2007) ; (JAEA-J 01897)
 
35000349
Applications of phase conjugate mirror to Thomson scattering diagnostics (invited)
Hatae, Takaki; Naito, Osamu; Nakatsuka, Masahiro*; Yoshida, Hidetsugu*
Review of Scientific Instruments 77(10), p.10E508_1-10E508_6(2006) ; (JAEA-J 01898)
 
35000350
Escaping ion measurement with high time resolution on CHS
Shinohara, Koji; Isobe, Mitsutaka*; Darrow, D. S.*
Review of Scientific Instruments 77(10), p.10E521_1-10E521_4(2006) ; (JAEA-J 01899)
 A scintillator probe can measure the temporal evolution of both the gyro-radius and the pitch angle of the escaping ions with relatively large energy. On this system, the time resolution of the 2D measurement is determined by a framing rate of the camera. The framing rate of the old camera was 60Hz, thus the time resolution was about 17 ms. Our interest is to understand the energetic ion transport in fast events such as a bursting Alfv'en eigenmode. The typical time scale of these event interested is less than a few ms. The time resolution of the old camera was not enough for this purpose. The FASTCAM ultima II, which is a product of Photron Co., is an image-intensified high-speed video camera system with the ability to record up to 13,500 frames per second. By replacing the old camera with this ultima II, the temporal resolution was improved from about 17 ms to 0.075 ms. We have successfully installed the fast camera and captured some fast events caused by MHDs, which was not observed by the old camera. Here, we will present the specification of this system and the preliminary results using this fast camera.
35000351
Location of deuterium atoms in BaSn0.5In0.5O2.75+α by neutron powder diffraction at 10 K
Ito, Tsuyoshi*; Nagasaki, Takanori*; Iwasaki, Kota*; Yoshino, Masahito*; Matsui, Tsuneo*; Igawa, Naoki; Ishii, Yoshinobu
Solid State Ionics 178(1-2), p.13-17(2007) ; (JAEA-J 01900)
 
35000352
Structural analysis of Si(111)-√21×√21-Ag surface by reflection high-energy positron diffraction
Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko
Surface Science 600(16), p.3141-3146(2006) ; (JAEA-J 01901)
 
35000353
Structural analysis of Ge(111)-3×3-Sn surface at low-temperature by reflection high-energy positron diffraction
Fukaya, Yuki; Kawasuso, Atsuo; Ichimiya, Ayahiko
Surface Science 600(18), p.4086-4088(2006) ; (JAEA-J 01902)
 
35000354
Extractant impregnation to polymer chain grafted onto porous membrane for high-speed analysis of radionuclide (in Japanese)
Asai, Shiho
Bunseki 2006(10), p.530-534(2006) ; (JAEA-J 01903)
 
35000355
Construction and application of T2-3 thermal neutron beam port in JRR-3 (in Japanese)
Metoki, Naoto; Kaneko, Koji
Hamon 16(2), p.120-122(2006) ; (JAEA-J 01906)
 We present the reconstruction of T2-3 beam line in the guide hall of JRR-3. T2-3 is a multi-purpose thermal neutron beam port with two monochromatic beam used for extreme condition experiments under high fields or at ultra-low temperatures, development and performance tests of neutron detectors and optical devices (NOP) for J-PARC, and industrial use such as residual stress analysis, etc. A sufficient beam time in a unit of 25 days are provided for internal and outside users. We request community to join this project and suggestion/criticism aimed to effective use of this beam line, oriented to complementary use of JRR-3 with J-PARC.
35000356
Report on the expert committee on development and utilization of phantoms, 1 (in Japanese)
Saito, Kimiaki; Kinase, Sakae; Fujisaki, Tatsuya*; Hiraoka, Takeshi*; Saito, Hidetoshi*; Tsuda, Shuichi; Sato, Kaoru; Takashima, Fusao*
Hoken Butsuri 41(3), p.158-168(2006) ; (JAEA-J 01907)
 
35000357
Storm surge simulation on Hurricane Katrina using air-wave-sea coupling model (in Japanese)
Kim, K.; Lee, H.*; Haggag, M.*; Yamashita, Takao*
Kaigan Kogaku Rombunshu 53, p.416-420(2006) ; (JAEA-J 01909)
 Generally when the sallow water area is continued, the occurrence ratio of whitecap breaking wave and sea water flow increases and activates, and the drift effect becomes larger. In addition, the circulation currents caused by typhoon or strong wind field are advanced in the ocean or the wide bay. The sudden water level rise occurs when this is blocked by the land. Because of this, the bigger storm surge occurs even with the low pressure of identical scale in the continental shelf area with wide and shallow water. Hurricane Katrina in 2005 is the similar case. In this research, the result of the storm surge simulation is shown in Hurricane Katrina case which considers the expansion mechanism of the surge on the continental shelf described above using the atmosphere-wave-ocean coupling model.
35000358
The Decomposition of dioxins in organic solvents by ionizing radiation (in Japanese)
Hirota, Koichi; Zhao, C.*; Kojima, Takuji; Hoshi, Masatoshi*
Kankyo To Sokutei Gijutsu 33(8), p.23-28(2006) ; (JAEA-J 01910)
 
35000359
Application of PLC to dynamic feedback control of a large liquid-He refrigerator system on nuclear fusion facility (in Japanese)
Okano, Fuminori; Honda, Atsushi; Oshima, Katsumi; Akino, Noboru; Kikuchi, Katsumi; Numazawa, Susumu*
Keiso 49(3), p.22-26(2006) ; (JAEA-J 01912)
 
35000360
Role of minerals and microorganisms in environmental behavior of metal ions (in Japanese)
Onuki, Toshihiko
Kensa Gijutsu 11(11), p.9-17(2006) ; (JAEA-J 01913)
 
35000361
Muon spin rotation and relaxation measurements under high pressure (in Japanese)
Higemoto, Wataru; Sato, Kazuhiko*
Kotai Butsuri 41(9), p.583-592(2006) ; (JAEA-J 01914)
 We described the muon spin rotation and relaxation measurement under high pressure. We have performed μSR experiment under high pressure in the piston cylinder type high pressure cell. We discussed the suitable materials of high pressure cell and pressure medium for μSR spectra. Finally, we presented the experimental results in CeRh2Si2 and TlCuCl3, showing the evolution of antiferromagnetism under high pressure.
35000362
Observation of atomic arrangement by using photoelectron holography and atomic stereo-photograph (in Japanese)
Matsushita, Tomohiro*; Guo, F. Z.*; Agui, Akane; Matsui, Fumihiko*; Daimon, Hiroshi*
Materia 45(11), p.791-796(2006) ; (JAEA-J 01915)
 
35000363
Corrosion test of structural materials for thermo-chemical and electrolytic hybrid hydrogen production cycle (in Japanese)
Takahashi, Toru; Kato, Shoichi; Nakagiri, Toshio; Aoto, Kazumi
Nippon Genshiryoku Gakkai Wabun Rombunshi 5(4), p.347-357(2006) ; (JAEA-J 01917)
 
35000364
New scope covered by PHITS; Particle and heavy ion transport code system (in Japanese)
Nakamura, Takashi*; Niita, Koji*; Iwase, Hiroshi*; Sato, Tatsuhiko
Nippon Genshiryoku Gakkai-Shi 48(12), p.949-954(2006) ; (JAEA-J 01919)
 
35000365
A Case study of analysis of faults in Neogene siliceous rocks (in Japanese)
Ishii, Eiichi; Fukushima, Tatsuo
Oyo Chishitsu 47(5), p.280-291(2006) ; (JAEA-J 01921)
 Because some fractures might be water conducting features in rocks, it is necessary to consider sufficiently the fractures, for development of a geological model. In this study, we have tried to understand geological characteristics and formative processes of faults in Neogene siliceous rocks, based on results of outcrop observation, boring-core observation, and borehole-wall observation, in order to develop an investigation technique for water conducting features. In addition, we have tried to estimate permeability of faults and to develop a geological conceptual model including water conducting features. The results of this study suggest the follow: Concerning faults without filling minerals and hydro-thermal alteration in Neogene siliceous rocks including fold structures, (1) in order to classify the faults, an attention of relation between fault direction and fold axis/bedding direction, of displacement sense, and of displacement is effective. (2) in order to understand the formative process of the faults, an observation of crosscutting relations of faults, an analysis of relationship between faulting and folding, and an inference of stress conditions of faulting by fault striation analysis are effective. (3) in order to estimate hydro-geological property, an observation of redox front along faults near the surface, and an analysis of fault density, of formative process of faults, and of relation between fault direction and stress axis are effective.
35000366
Development of high performance polymer electrolyte fuel cell membrane by γ-irradiation process (in Japanese)
Asano, Masaharu; Chen, J.; Maekawa, Yasunari; Yoshida, Masaru
Purasuchikkusu 57(5), p.9-15(2006) ; (JAEA-J 01922)
 To development a high chemical stable proton exchange membrane for application in DMFC, four styrene derivative monomers, p-methylstyrene (MeSt), p-tert-butylstyrene (tBuSt), divinylbenzene (DVB) and bis(vinyl phenyl) ethane (BVPE) were graft copolymerized into the poly(ethylene-co-tetrafluoroethylene) (ETFE) film by a radiation graft technique and followed by sulfonation the grafted ETFE film. Ion exchange capacity (IEC), proton conductivity, water uptake, chemical stability and methanol permeability of the proton exchange membrane were determined. The four monomers-grafted membrane with proton conductivity as high as Nafion membrane was several times stabler than the traditional styrene/DVB-grafted membrane, and five times lower methanol permeability compared to Nafion 112 membrane. Therefore, the developed four monomers-grafted membrane was a more promising material for the application in DMFC.
35000367
Development of alumina ceramics vacuum chamber for J-PARC
Kinsho, Michikazu; Saito, Yoshio*; Kabeya, Zenzaburo*; Ogiwara, Norio
Shinku 49(12), p.728-733(2006) ; (JAEA-J 01926)
 It was success to develop alumina ceramics vacuum duct for the 3GeV-RCS of J-PARC at JAERI. This duct has titanium flanges and the exterior RF shield to reduce duct impedance. The production process of the alumina ceramics vacuum duct could be established, and mass production has been performing.
35000368
Real-time photoelectron spectroscopy for Nitridation at Ti(0001) surface using supersonic N2 molecular beams (in Japanese)
Ogawa, Shuichi*; Takakuwa, Yuji*; Ishizuka, Shinji*; Yoshigoe, Akitaka; Teraoka, Yuden; Mizuno, Yoshiyuki*
Shinku 49(12), p.775-779(2006) ; (JAEA-J 01927)
 Nitridation on a Ti(0001)-1×1 surface using a supersonic N2 molecular beam was investigated by real-time photoelectron spectroscopy to clarify the adsorption reaction dynamics of N2 molecule on the Ti surface. In a whole N2 dosage region examined, N 1s spectra can be fitted well with two chemically-shifted components, the binding energies of which are 396.9 and 396.6 eV, respectively. For both the components, the initial sticking probability S0 shows a decrease with increasing incident energy in the overall trend, while has significant minima at 0.3 and 1.5 eV. Such incident energy dependences of S0 suggest that the chemisorbed states are similarly caused by a trapping-mediated adsorption process through a physisorption state at lower incident energy than 0.3 eV and an activated adsorption process becomes dominant at higher incident energy than 0.3 eV.
35000369
Neutrino-nucleus reactions induced by supernova neutrinos
Suzuki, Toshio*; Chiba, Satoshi; Iwamoto, Osamu; Kajino, Toshitaka*
AIP Conference Proceedings 847 , p.479-481(2006) ; (JAEA-J 01930)
 
35000370
First principles molecular dynamics simulation of solution
Boero, M.*; Ikeda, Takashi; Hirata, Masaru
Annual Report of the earth Simulator Center April 2005 - March 2006 , p.267-270(2007) ; (JAEA-J 01931)
 
35000371
Current status and potential needs of burn-up credit in Japan
Suyama, Kenya; Okuno, Hiroshi; Uchiyama, Gunzo; Yamamoto, Toru*
Need for Post Irradiation Experiments to Validate Fuel Depletion Calculation Methodologies , p.31-34(2006) ; (JAEA-J 01932)
 In Japan, burnup credit (BUC) has already been introduced into the criticality safety evaluation of Spent Nuclear Fuel (SNF) receiving pools and dissolver at Rokkasho Reprocessing Plant (RRP). BUC in other fuel cycle facilities including SNF transport is not considered. This is because the pressure of accumulation of SNF in Japan is decreased for a while since (1) the operation of spent fuel storage pools in RRP and (2) proposal of construction of an interim storage facility using dry-type metal casks by Recyclable-Fuel Storage Company (RFS) in Aomori. However, potential demands for adoption of BUC and improvement of related techniques have been still high. The technical development related to BUC is in progress continuously in the field of burnup analysis as post irradiation examinations (PIE) and reactor physics experiments. This concludes that BUC is an attractive concept and further adoption in spent fuel management process is expected in Japan.
35000372
Current status of spent fuel isotopic composition database SFCOMPO and related technical development by JAEA
Suyama, Kenya; Okuno, Hiroshi; Uchiyama, Gunzo
Need for Post Irradiation Experiments to Validate Fuel Depletion Calculation Methodologies , p.151-156(2006) ; (JAEA-J 01933)
 In the field of criticality safety evaluation of spent fuels, Japan Atomic Energy Agency (former Japan Atomic Energy Research Institute, JAERI) has carried out continuous research and development. The effort includes obtaining isotopic composition data of spent nuclear fuels by the post irradiation examinations (PIE) for spent fuels irradiated in light water reactors and developing burnup calculation code system SWAT and new libraries for ORIGEN2 code adopting latest nuclear data libraries. JAERI had developed isotopic composition database SFCOMPO. This report describes current status of SFCOMPO and a result of technical developments of burnup credit in JAEA, i.e. re-evaluation of burnup values of PIE data taken at JAERI.
35000373
Resonance self-shielding effect in covariance processing
Chiba, Go
Perspectives on nuclear data for the next decade , p.227-232(2007) ; (JAEA-J 01934)
 Covariance of energy-averaged cross section depend on a dilution cross section of target system because of the resonance self-shielding effect. In the present paper, we evaluate the dependency by using the covariance processing code, ERRORJ. We show that not only covariance for large resonance but also those for small resonance is important when the resonance self-shielding effect is considered. We also evaluate the effect on the uncertainty propagation from resonance parameters to nuclear characteristics.
35000374
Wideband low-output-impedance RF system for the second harmonic cavity in the ISIS synchrotron
Irie, Yoshiro; Dooling, J.*; Horan, D.*; Kustom, R.*; Middendorf, M.*; Pile, G.*; Bayley, D.*; Cross, G.*; Gardner, I.*; Glover, M.*; Jenkins, D.*; Morris, A.*; Seville, A.*; Stoneham, S.*; Thomason, J.*; Western, T.*; Fukumoto, Sadayoshi*; Muto, Kenichi*; Oki, Toshiyuki*; Takagi, Akira*; Takano, Susumu*
Proceedings of 10th European Particle Accelerator Conference (EPAC '06) (CD-ROM) , p.321-323(2006) ; (JAEA-J 01935)
 Wideband low-output-impedance RF system for the second harmonic cavity in the ISIS synchrotron has been developed by the collaboration between ANL (US), KEK (Japan) and RAL (UK). Low output impedance is realized by the feedback from plate to grid of the final triode amplifier, resulting in less than 30 ohms over a wide frequency range of 2.7 - 6.2 MHz. The vacuum tubes in the driver and final stages are both operated in class A. High power test was performed with a ferrite-loaded second harmonic cavity, where the bias current was swept at 50 Hz repetition rate. The maximum voltage of 12 kV peak per accelerating gap was obtained stably at earlier period of an acceleration cycle. A beam test with this system is planned at the ISIS synchrotron soon.
35000375
Development of the feedforward system for beam loading compensation in the J-PARC RCS
Tamura, Fumihiko; Schnase, A.; Nomura, Masahiro; Yamamoto, Masanobu; Yoshii, Masahito*; Anami, Shozo*; Ezura, Eiji*; Hara, Keigo*; Omori, Chihiro*; Takagi, Akira*
Proceedings of 10th European Particle Accelerator Conference (EPAC '06) (CD-ROM) , p.1319-1321(2006) ; (JAEA-J 01936)
 In the J-PARC Rapid Cycling Synchrotron (RCS), the heavy beam loading effects due to the high intensity proton beam must be compensated for stable acceleration. The beam feedforward technique is used to compensate the beam loading in the RCS. We present the development of the feedforward system. We designed and built the full-digital system. Because of the low Q value of each accelerating cavity, the wake voltage consists of not only the accelerating harmonic component but also higher harmonics. Thus, the system is designed to compensate the beam loading at several harmonics. The vector components of the selected harmonic are detected from the beam signal picked up by a wall current monitor. The compensation RF signal is generated from the vector components with proper gain and phase in the latter part. The gain and phase are set individually for each harmonic and each cavity of the twelve cavities. We also present the preliminary test results of the newly developed modules.
35000376
Statistical characteristics of turbulent transport dominated by zonal flow dynamics
Matsumoto, Taro; Kishimoto, Yasuaki; Li, J.*
Proceedings of 21st IAEA Fusion Energy Conference (FEC 2006) (CD-ROM) , 8p.(2007) ; (JAEA-J 01938)
 Characteristics of ETG-driven turbulent transport dominated by zonal flows and nonlinearly generated large scale structures with low toroidal/poloidal wave numbers are investigated by gyro-fluid simulations in slab geometry. Main results found in this research are as follows. (1) The zonal flows change the characteristics of turbulence from "homogeneous" structure to "inhomogeneous" one, in which micro-scale vortices and nonlinearly generated macro-scale vortices coexist at different radial zones, exhibiting a two-scale nature in turbulence. (2) The fractal dimension is simultaneously reduced at any radial region with an increase of the ratio of zonal flow energy to that of total fluctuations, accompanied by the disappearance of exponential PDF tail of the heat flux. (3) The reduction of heat flux in strong zonal flow regime results from two mechanisms in the relation between poloidal electric field and pressure perturbation, i.e. the reduction of coherence in the zone of micro-scale vortices and the phase synchronization in that of macro-scale ones.
35000377
Development of on-line monitoring system for Nuclear Power Plant (NPP) using neuro-expert, noise analysis, and modified neural networks
Subekti, M.*; Ono, Tomio*; Kudo, Kazuhiko*; Nabeshima, Kunihiko; Takamatsu, Kuniyoshi
Proceedings of 5th American Nuclear Society International Topical Meeting on Nuclear Plant Instrumentation, Controls, and Human Machine Interface Technology (NPIC & HMIT 2006) (CD-ROM) , p.75-82(2006) ; (JAEA-J 01939)
 The neuro-expert has been utilized in previous monitoring-system research of Pressure Water Reactor (PWR). The research improved the monitoring system by utilizing neuro-expert, conventional noise analysis and modified neural networks for capability extension. The parallel method applications required distributed architecture of computernetwork for performing real-time tasks. The research aimed to improve the previous monitoring system, which could detect sensor degradation, and to perform the monitoring demonstration in High Temperature Engineering Tested Reactor (HTTR). The developing monitoring system based on some methods that have been tested using the data from online PWR simulator, as well as RSG-GAS (30 MW research reactor in Indonesia), will be applied in HTTR for more complex monitoring.
35000378
Generation of nanometer-sized silicon tadpoles irradiated with a high intensity laser pulse
Sagisaka, Akito; Azuma, Hirozumi*; Daido, Hiroyuki; Kamiya, Nobuo*; Ito, Tadashi*; Takeuchi, Akihiro*; Suzuki, Noritomo*; Nishimura, Akihiko; Mori, Michiaki; Orimo, Satoshi; Ogura, Koichi
Proceedings of 4th International Congress on Laser Advanced Materials Processing (LAMP 2006) (Internet) , 3p.(2006) ; (JAEA-J 01942)
 
35000379
Predictive analysis of groundwater flow due to the excavation of Horonobe URL (in Japanese)
Kumamoto, So*; Shimo, Michito*; Kurikami, Hiroshi
Chikasui Ryudo Kaiseki To Moderuka Ni Kansuru Shimpojium Happyo Romnbunshu , p.43-50(2007) ; (JAEA-J 01943)
 
35000380
Analytical study of groundwater flow evolution due to climatic and sealevel change (in Japanese)
Kurikami, Hiroshi; Yasue, Kenichi; Niizato, Tadafumi; Imai, Hisashi*; Shiozaki, Isao *; Yamashita, Ryo*
Chikasui Ryudo Kaiseki To Moderuka Ni Kansuru Shimpojium Happyo Romnbunshu , p.59-66(2007) ; (JAEA-J 01944)
 
35000381
The Cooling system of high power RF sorce at J-PARC linac (in Japanese)
Hori, Toshihiko; Chishiro, Etsuji; Yamazaki, Masayoshi; Hasegawa, Kazuo
Dai-17-Kai Bunshi Kagaku Kenkyusho Gijutsu Kenkyukai Hokokushu (CD-ROM) , 4p.(2006) ; (JAEA-J 01945)
 
35000382
Evaluation of fracturing process of soft rocks at great depth by AE measurement and DEM simulation (in Japanese)
Aoki, Kenji*; Mito, Yoshitada*; Kurokawa, Susumu*; Matsui, Hiroya; Niunoya, Sumio; Minami, Masayuki*
Dai-36-Kai Ganban Rikigaku Ni Kansuru Shimpojiumu Koen Rombunshu , p.235-238(2007) ; (JAEA-J 01946)
 The monitoring of EDZ (Excavation Disturbed Zone) is one of the most important required technologies for the design of rock caverns such as the high-level radioactive waste repository. The authors developed the stress-based evaluation system of EDZ by AE monitoring and DEM (Distinct Element Method) simulation. In order to apply this system to the soft rock site, the authors try to grasp the relationship between AE parameters, stress change and rock failure by performing the high stiffness tri-axial compression tests including AE measurements on the soft rock samples, and its simulations by DEM using bonded particle model.
35000383
Configuration of hydraulic effective porosity based on borehole investigation in fractured rock (in Japanese)
Sawada, Atsushi; Takeuchi, Shinji; Saegusa, Hiromitsu; Amano, Kenji
Dai-36-Kai Ganban Rikigaku Ni Kansuru Shimpojiumu Koen Rombunshu , p.273-278(2007) ; (JAEA-J 01947)
 The groundwater flow velocity in void space of rock mass is one of the important parameters for evaluating mass transport in deep underground, especially on the safety assessment of high-level radioactive waste disposal. In general, the groundwater velocity in void space of rock mass is calculated by darcy velocity devided by the effective porosity. For estimating the effective porosity, the groundwater flowing void space should be evaluated. This paper describes configuration of the hydraulic effective porosity of fractured rock, and the study of estimating the hydraulic effective porosity by using borehole investigation data drilled from the surface.
35000384
Evolution of permeability in diatomaceous rocks mediated by pressure solution (in Japanese)
Yasuhara, Hideaki*; Kurikami, Hiroshi; Kinoshita, Naoki*; Kishida, Kiyoshi*
Dai-36-Kai Ganban Rikigaku Ni Kansuru Shimpojiumu Koen Rombunshu , p.283-286(2007) ; (JAEA-J 01948)
 
35000385
Radiation resistance of bacteria (in Japanese)
Narumi, Issei
Kogosei Biseibutsu No Kino To Oyo , p.311-317(2006) ; (JAEA-J 01950)
 DNA that plays a central role in genetic information is continually exposed to environmental factors such as UV light from solar radiation and reactive oxygen species that could induce damage to DNA. Living organisms that have acquired DNA protection and repair mechanisms cope with genetic lesions. All the organisms live in the presence of natural radiation. However, there exist non-spore forming bacteria that survive following exposure to strong radiation more than 300 million-times the dose of natural radiation. These bacteria are collectively dubbed radioresistant bacteria. In chapter 8 "Application of Photosynthetic Microorganisms to Outer Space and Radiation" of a book "Photosynthetic Microorganisms: Fundamentals and Novel Applications of their Bio-functions", the author provided commentaries on the radioresistant bacteria belonging to the genus Deinococcus, the radioresistant bacteria belonging to other genus, and the origin of evolution of radioresistance with quoting latest journal articles.
35000386
Optimization of deep borehole investigation layout under spatial restriction (in Japanese)
Eguchi, Takao; Amano, Kenji
Nippon Oyo Chishitsu Gakkai Heisei-18-Nendo Kenkyu Happyokai Koen Rombunshu , p.175-178(2006) ; (JAEA-J 01952)
 
35000387
Estimation of fault zone intervals by multivariate analysis (in Japanese)
Abumi, Kensho; Amano, Kenji
Nippon Oyo Chishitsu Gakkai Heisei-18-Nendo Kenkyu Happyokai Koen Rombunshu , p.263-266(2006) ; (JAEA-J 01953)
 
35000388
Groundwater flow monitoring around the MIU-site using fluid flow tomography method (in Japanese)
Matsuoka, Toshiyuki; Semba, Takeshi; Ishigaki, Koichi; Sugimoto, Yoshihiro*; Tanoue, Masayoshi*; Narita, Norifumi*
Nippon Oyo Chishitsu Gakkai Heisei-18-Nendo Kenkyu Happyokai Koen Rombunshu , p.331-334(2006) ; (JAEA-J 01954)
 
35000389
Application of multivariate analysis in stratigraphic classification of sedimentary rocks (in Japanese)
Kikuchi, Teruyuki; Amano, Kenji
Nippon Oyo Chishitsu Gakkai Heisei-18-Nendo Kenkyu Happyokai Koen Rombunshu , p.521-524(2006) ; (JAEA-J 01955)
 
35000390
Equipments for EMC in the J-PARC linac (in Japanese)
Chishiro, Etsuji; Kobayashi, Tetsuya; Suzuki, Hiroyuki; Yamazaki, Masayoshi; Hori, Toshihiko; Fang, Z.*; Fukui, Yuji*; Kawamura, Masato*; Yamaguchi, Seiya*; Anami, Shozo*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.962-964(2006) ; (JAEA-J 01957)
 
35000391
Experimental and analysis of the injection bump system of the 3-GeV RCS in J-PARC (in Japanese)
Takayanagi, Tomohiro; Ueno, Tomoaki; Kinsho, Michikazu; Takeda, Osamu; Yamazaki, Yoshio; Yoshimoto, Masahiro; Kamiya, Junichiro; Watanabe, Masao; Kuramochi, Masaya; Irie, Yoshiro
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.74-76(2006) ; (JAEA-J 01958)
 The injection bump system of the 3-GeV RCS in J-PARC consists of the pulse bending magnets for the injection bump orbit, which are four horizontal bending magnets (shift bump), four horizontal painting magnets (h-paint bump) and two vertical painting magnets (v-paint bump). The magnetic field distributions of the shift bump magnet were measured with a long search coil, thus giving a BL product over the magnet gap area. Future more, the temperature distributions at the various points were measured by the thermocouples over 24 hours till they saturated. The good performance at the 181 MeV injection beam design was confirmed.
35000392
Pinpoint attack on cancer cell with ions (in Japanese)
Arakawa, Kazuo
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.85-89(2006) ; (JAEA-J 01959)
 
35000393
Uncut core loaded cavity with parallel inductor to reach Q=2 for J-PARC RCS
Schnase, A.; Hasegawa, Katsushi; Nomura, Masahiro; Tamura, Fumihiko; Yamamoto, Masanobu; Anami, Shozo*; Ezura, Eiji*; Hara, Keigo*; Hashimoto, Yoshinori*; Omori, Chihiro*; Takagi, Akira*; Toda, Makoto*; Yoshii, Masahito*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.145-147(2006) ; (JAEA-J 01960)
 The optimum quality factor of the acceleration cavities for the J-PARC Rapid Cycling Synchrotron is Q=2. The first approach used cut-cores, where the distance between core halves in the cavity tank defines the quality factor while keeping the shunt impedance. Problems in core manufacturing made it unlikely that such cavities can operate for long time. The next step was a Q=2 hybrid structure; 4 of the 6 cavity tanks are filled with uncut cores at Q=0.6 and only 2 tanks are loaded with cut cores at wider distance (Q=4), which is easier to manage. Issues with the cut-core manufacturing remained, so RCS day-1 operation will start with uncut core cavities. However, Q=0.6 limits the maximum beam power. We present an idea, based on the hybrid cavity to add a parallel high quality circuit of inductor and capacitor to change the resonant frequency from 1 to 1.7 MHz and the total Q-value from 0.6 to 2, thus enabling almost full beam power operation of RCS with uncut cores loaded cavities.
35000394
Construction of the J-PARC L3BT control system
Shen, G.; Watanabe, Kazuhiko*; Kato, Yuko; Sakaki, Hironao; Sako, Hiroyuki; Ito, Yuichi; Yoshikawa, Hiroshi; Hanawa, Katsushi*; Mizuno, Seiji*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.364-366(2006) ; (JAEA-J 01961)
 The control system of J-PARC project is under construction. After almost finishing the hardware installation of the L3BT section, an online device commissioning was performed for magnet power supply, stepping motor and vacuum system. Many components for device control have already been developed separately, but not integrated together yet. It is the first experience to combine all the components, including core software for a front-end IO controller, an EPICS run-time database, and a remote graphic user interface. This paper describes the detail of the recent construction status of the L3BT control system, including component development, system integration, and device commissioning.
35000395
Interlock systems for J-PARC LINAC (in Japanese)
Sakaki, Hironao; Takahashi, Hiroki; Ishiyama, Tatsuya*; Kawase, Masato; Sako, Hiroyuki; Kato, Yuko; Ito, Yuichi; Yoshikawa, Hiroshi; Ueda, Shinji*; Suzuki, Takahiro*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.367-369(2006) ; (JAEA-J 01962)
 This paper reports Personnel Interlock System, Machine Protection System, and other Interlock System in J-PARC LINAC. The noise measures is important in MPS, we describe the noise decreasing method. The number of accelerating particles in J-PARC LINAC that can be accelerated has been deciding by ministry's guideline. Therefore, it is necessary to do severe surveillance. Here we also explain this particle monitoring instrument.
35000396
Construction of GUI for J-PARC LINAC machine protection system (in Japanese)
Ishiyama, Tatsuya*; Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Ueda, Shinji*; Sugimoto, Makoto*; Suzuki, Takahiro*; Ikeda, Hiroshi*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.370-372(2006) ; (JAEA-J 01963)
 
35000397
RDB system in J-PARC LINAC and its application to commissioning, 2 (in Japanese)
Sako, Hiroyuki; Sakaki, Hironao; Takahashi, Hiroki; Yoshikawa, Hiroshi; Ito, Yuichi; Kato, Yuko; Kawase, Masato; Shen, G.; Kiyomichi, Akio; Kamikubota, Norihiko*; Sugimoto, Makoto*; Watanabe, Kazuhiko*; Ikeda, Hiroshi*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.373-375(2006) ; (JAEA-J 01964)
 A Relational database (RDB) system, which is the core of the J-PARC Linac control system, has been developed. The beam commissioning of Linac is planned to start in December 2006. The RDB sytem consists of the following databases; "DB1", which records basic device parameters, "DB2", which acquires online EPICS data, "Operation Log DB", which records a history of operating parameters, and "Commissioning DB", which holds information on geometry of devices and commissioning. We report on the development status of each DB as well as status of the unified commissioning environment software which utilizes these databases.
35000398
Stabilization of accelerating field using FPGA for J-PARC linac
Fang, Z.*; Anami, Shozo*; Michizono, Shinichiro*; Yamaguchi, Seiya*; Kobayashi, Tetsuya; Suzuki, Hiroyuki
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.397-399(2006) ; (JAEA-J 01965)
 The FPGA based digital RF feedback system installed in a compact PCI (cPCI) is applied to the J-PARC linac in order to realize the accelerating field stability of ±1 percent in amplitude and ±1 degree in phase. A DSP board is used for digital signal processing and monitoring, cavity tuner controlling, and communication between FPGA and CPU. At first, the 12 MHz down converted ADC signals of accelerating fields are transferred to I and Q components. A PI is used in the feedback control. The feedback and cavity tuner control tests of the newly improved software will be performed in June and July 2006, and the test results will be presented in this paper.
35000399
The Measurement of magnetic field interference of adjacent to quadrupole magnets of J-PARC RCS (in Japanese)
Tani, Norio; Watanabe, Yasuhiro; Adachi, Toshikazu*; Someya, Hirohiko*; Igarashi, Susumu*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.415-417(2006) ; (JAEA-J 01966)
 
35000400
Development of the positioning system for field measurements of J-PARC RCS magnets (in Japanese)
Haga, Koichi; Tani, Norio; Watanabe, Yasuhiro; Someya, Hirohiko*; Adachi, Toshikazu*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.418-420(2006) ; (JAEA-J 01967)
 
35000401
Magnetic field measurement of the extraction Kicker in J-PARC RCS (in Japanese)
Kuramochi, Masaya; Kamiya, Junichiro; Kinsho, Michikazu; Takeda, Osamu; Yoshimoto, Masahiro; Takayanagi, Tomohiro; Watanabe, Masao; Yamazaki, Yoshio; Ueno, Tomoaki
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.421-423(2006) ; (JAEA-J 01968)
 Production of the extraction kicker magnet of 3GeV RCS in J-PARC has been completed. We performed the magnetic field measurement in vacuum at the actual operation condition, which means the charging voltage of 60 kV and repetition rate of 25 Hz. We especially discuss the stability of the magnetic field and the comparison of the magnetic field between the same type of magnets.
35000402
Development of current control system for resonant power supply in the J-PARC RCS (in Japanese)
Watanabe, Yasuhiro; Tani, Norio; Adachi, Toshikazu*; Igarashi, Susumu*; Someya, Hirohiko*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.424-426(2006) ; (JAEA-J 01969)
 
35000403
Vibration measurement of the injection pulse magnet of the 3-GeV RCS in J-PARC (in Japanese)
Ueno, Tomoaki; Takayanagi, Tomohiro; Kinsho, Michikazu; Takeda, Osamu; Yamazaki, Yoshio; Yoshimoto, Masahiro; Kamiya, Junichiro; Watanabe, Masao; Kuramochi, Masaya
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.427-429(2006) ; (JAEA-J 01970)
 The injection pulse magnets of the 3GeV RCS in J-PARC are vibrated by repeating the high current exciting waveform of a high speed rising and falling. The pulse magnets have the ceramic duct in order to suppress the generation of the heat load by the eddy current and the broken by the strong vibration. Therefore, the vibration of the horizontal shift bump magnet was measured by using the CCD laser displacement meter of a high speed and a high precision.
35000404
Development of J-PARC ring RF cavity (in Japanese)
Nomura, Masahiro; Tamura, Fumihiko; Schnase, A.; Yamamoto, Masanobu; Hasegawa, Katsushi; Anami, Shozo*; Ezura, Eiji*; Hara, Keigo*; Toda, Makoto*; Omori, Chihiro*; Takagi, Akira*; Yoshii, Masahito*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.454-456(2006) ; (JAEA-J 01971)
 
35000405
Diamond polished cut cores for the J-PARC MA RF cavities (in Japanese)
Hasegawa, Katsushi; Nomura, Masahiro; Schnase, A.; Tamura, Fumihiko; Yamamoto, Masanobu; Yoshii, Masahito*; Omori, Chihiro*; Hara, Keigo*; Toda, Makoto*; Takagi, Akira*; Anami, Shozo*; Ezura, Eiji*; Ueno, Kenji*; Funahashi, Yoshisato *
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.457-459(2006) ; (JAEA-J 01972)
 
35000406
Synchronization system for the J-PARC RCS (in Japanese)
Tamura, Fumihiko; Schnase, A.; Nomura, Masahiro; Yamamoto, Masanobu; Hasegawa, Katsushi; Yoshii, Masahito*; Omori, Chihiro*; Hara, Keigo*; Toda, Makoto*; Takagi, Akira*; Anami, Shozo*; Ezura, Eiji*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.460-462(2006) ; (JAEA-J 01973)
 The beam in the J-PARC RCS has to be extracted with the proper timingand phase to the MR (main ring) and the neutron target in the MLF (material and life science facility). The neutron beamfrom the neutron target is led to the group of spectrometers, such asthe fermi chopper. The choppers and the beam must be precisely synchronized to achieve high energy resolution. Also, the MR injection requires the proper RF bucket selection andprecise beam phase control to avoid the longitudinal dipole oscillations. In this presentation we describe the requirements of the beamsynchronization, the operational principle, and the newly developedmodules for the synchronization.
35000407
Acceleration cavity tuner controller noise measure (in Japanese)
Suzuki, Hiroyuki; Chishiro, Etsuji; Ito, Takashi; Hasegawa, Kazuo; Anami, Shozo*; Yamaguchi, Seiya*; Michizono, Shinichiro*; Fang, Z.*; Naito, Fujio*; Tanaka, Hirokazu*
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.493-495(2006) ; (JAEA-J 01974)
 
35000408
Output properties of IOT RF sources (in Japanese)
Sawamura, Masaru
Proceedings of 3rd Annual Meeting of Particle Accelerator Society of Japan and 31st Linear Accelerator Meeting in Japan (CD-ROM) , p.832-834(2006) ; (JAEA-J 01975)
 
35000409
Status of beryllium R&D in Japan
Kawamura, Hiroshi; Tsuchiya, Kunihiko; Mishima, Yoshinao*; Yoshida, Naoaki*; Munakata, Kenzo*; Ishida, Kiyohito*; Hatano, Yuji*; Shibayama, Tamaki*; Sato, Yoshiyuki*; Uchida, Munenori*; Tanaka, Satoru*
INL/EXT-06-01222 , p.1-7(2006) ; (JAEA-J 01976)
 
35000410
Geological distribution of plutonium isotopes of Nagasaki atomic bomb spread over Nagasaki and Kumamoto area (in Japanese)
Kokubu, Yoko; Yasuda, Kenichiro; Magara, Masaaki; Miyamoto, Yutaka; Sakurai, Satoshi; Usuda, Shigekazu; Yamazaki, Hideo*; Yoshikawa, Shusaku*
KEK Proceedings 2006-5 , p.36-40(2006) ; (JAEA-J 01979)
 
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