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Journal Articles

Nanoscale diffusion tracing by radioactive $$^{8}$$Li tracer

Ishiyama, Hironobu*; Jeong, S.-C.*; Watanabe, Yutaka*; Hirayama, Yoshikazu*; Imai, Nobuaki*; Miyatake, Hiroari*; Oyaizu, Mitsuhiro*; Katayama, Ichiro*; Osa, Akihiko; Otokawa, Yoshinori; et al.

Japanese Journal of Applied Physics, 53(11), p.110303_1 - 110303_4, 2014/11

 Times Cited Count:4 Percentile:21.42(Physics, Applied)

Journal Articles

Recent progress in the energy recovery linac project in Japan

Sakanaka, Shogo*; Akemoto, Mitsuo*; Aoto, Tomohiro*; Arakawa, Dai*; Asaoka, Seiji*; Enomoto, Atsushi*; Fukuda, Shigeki*; Furukawa, Kazuro*; Furuya, Takaaki*; Haga, Kaiichi*; et al.

Proceedings of 1st International Particle Accelerator Conference (IPAC '10) (Internet), p.2338 - 2340, 2010/05

Future synchrotron light source using a 5-GeV energy recovery linac (ERL) is under proposal by our Japanese collaboration team, and we are conducting R&D efforts for that. We are developing high-brightness DC photocathode guns, two types of cryomodules for both injector and main superconducting (SC) linacs, and 1.3 GHz high CW-power RF sources. We are also constructing the Compact ERL (cERL) for demonstrating the recirculation of low-emittance, high-current beams using above-mentioned critical technologies.

JAEA Reports

Analyses of benchmark problems for the shielding design of high intensity proton accelerator facilities

Matsuda, Norihiro; Iwamoto, Yosuke; Harada, Masahide; Teshigawara, Makoto; Meigo, Shinichiro; Maekawa, Fujio; Oguri, Tomomi*; Nakano, Hideo*; Nakao, Noriaki*; Nakane, Yoshihiro; et al.

JAEA-Technology 2008-030, 150 Pages, 2008/03

JAEA-Technology-2008-030.pdf:20.67MB

Radiation Shielding design/safety analysis required for licensing of the high intensity proton accelerator facility J-PARC (Japan Proton Accelerator Research Complex) is in progress, using various high-energy particle transport codes. Shielding benchmark problems, mainly based on experiments, on thick target neutron yield, beam dump geometry, deep penetration and radiation streaming were prepared and analyzed by the shielding design codes, in order to estimate the code's accuracy. The results of analyses show that the calculation results agree with the experiments within a factor of two on the whole.

Journal Articles

The H-Invitational Database (H-InvDB); A Comprehensive annotation resource for human genes and transcripts

Yamasaki, Chisato*; Murakami, Katsuhiko*; Fujii, Yasuyuki*; Sato, Yoshiharu*; Harada, Erimi*; Takeda, Junichi*; Taniya, Takayuki*; Sakate, Ryuichi*; Kikugawa, Shingo*; Shimada, Makoto*; et al.

Nucleic Acids Research, 36(Database), p.D793 - D799, 2008/01

 Times Cited Count:51 Percentile:74.53(Biochemistry & Molecular Biology)

Here we report the new features and improvements in our latest release of the H-Invitational Database, a comprehensive annotation resource for human genes and transcripts. H-InvDB, originally developed as an integrated database of the human transcriptome based on extensive annotation of large sets of fulllength cDNA (FLcDNA) clones, now provides annotation for 120 558 human mRNAs extracted from the International Nucleotide Sequence Databases (INSD), in addition to 54 978 human FLcDNAs, in the latest release H-InvDB. We mapped those human transcripts onto the human genome sequences (NCBI build 36.1) and determined 34 699 human gene clusters, which could define 34 057 protein-coding and 642 non-protein-coding loci; 858 transcribed loci overlapped with predicted pseudogenes.

JAEA Reports

Evaluation of deuteron-induced activation for IFMIF accelerator structural materials

Nakao, Makoto*; Hori, Junichi*; Ochiai, Kentaro; Kubota, Naoyoshi; Sato, Satoshi; Yamauchi, Michinori; Ishioka, Noriko; Suto, Hiroyuki*; Nishitani, Takeo

JAEA-Research 2006-071, 37 Pages, 2006/11

JAEA-Research-2006-071.pdf:6.72MB

In the design of IFMIF, long-term operation with total facility availability of at least 70 % is required. However, activation of structural materials by deuteron beam limits maintenance, which causes lower facility availability. Thus it is essential to prepare deuteron-induced activation cross section database and to select low activation materials based on it. In this work, we measured deuteron-induced activation cross sections of aluminum, vanadium, chromium, manganese, iron, nickel, copper, tantalum, tungsten and gold. The measured cross sections were compared with other experimental data and calculations. Deuteron-induced activities of nuclides produced in SS316 and F82H alloys used as the accelerator structural material were also measured to validate the measured cross sections comprehensively. It demonstrated that the measured activities of almost all the nuclides were in agreement with evaluated ones based on the measured cross sections within error.

Journal Articles

Measurements of deuteron-induced activation cross-sections for IFMIF accelerator structural materials

Nakao, Makoto*; Hori, Junichi*; Ochiai, Kentaro; Kubota, Naoyoshi; Sato, Satoshi; Yamauchi, Michinori*; Ishioka, Noriko; Nishitani, Takeo

Nuclear Instruments and Methods in Physics Research A, 562(2), p.785 - 788, 2006/06

 Times Cited Count:23 Percentile:84.38(Instruments & Instrumentation)

Activation cross sections for deuteron-induced reactions on aluminum, iron, copper, tantalum and tungsten were measured by using stacked-foil method. The stacked-foils were irradiated with deuteron beam at the AVF cyclotron in TIARA facility, JAERI. We obtained the activation cross-sections for $$^{27}$$Al(d,x)$$^{22,24}$$Na, $$^{nat}$$Fe(d,x)$$^{55,56}$$Co, $$^{nat}$$Cu(d,x)$$^{61}$$Cu, $$^{nat}$$Cu(d,x)$$^{62}$$Zn, $$^{nat}$$Ta(d,x)$$^{178,180}$$Ta and $$^{nat}$$W(d,x)$$^{181,183}$$Re in 20-40MeV region. These cross-sections were compared with other experimental ones and the data in the ACSELAM library calculated by the ALICE-F code.

Journal Articles

Measurements of deuteron-induced activation cross sections for IFMIF accelerator structural materials

Nakao, Makoto; Hori, Junichi*; Ochiai, Kentaro; Kubota, Naoyoshi; Sato, Satoshi; Yamauchi, Michinori; Ishioka, Noriko; Nishitani, Takeo

FAPIG, (172), p.3 - 7, 2006/03

The IFMIF (International Fusion Materials Irradiation Facility) is in the design planning stage as neutron source to test fusion reactor materials for high fluence neutron. In the design of it long-term operation that total facility is 70 % at least is required. However, deuteron beam activates the structural materials and these activation limits maintenance and makes long-term operation difficult. Thus the accurate estimation of deuteron-induced activity and the selection of structural materials are important. In this work, measurements of deuteron-induced activation cross sections for aluminum, iron, copper, tantalum, and tungsten were performed.

Journal Articles

Measurements of deuteron-induced activation cross sections for IFMIF accelerator structural materials in the energy range of 22-40 MeV

Ochiai, Kentaro; Nakao, Makoto*; Hori, Junichi*; Sato, Satoshi; Yamauchi, Michinori*; Ishioka, Noriko; Nishitani, Takeo

Fusion Engineering and Design, 81(8-14), p.1459 - 1464, 2006/02

 Times Cited Count:2 Percentile:18.25(Nuclear Science & Technology)

The IFMIF consists of two 40 MeV deuteron linear accelerators with 125 mA beam current each. The structure materials of the accelerators are activated with high energetic deuteron. To measure the activation cross sections with $$^{27}$$Al, $$^{rm nat}$$Cu, $$^{rm nat}$$W, $$^{rm nat}$$V, $$^{rm nat}$$Ni, $$^{rm nat}$$Fe, and $$^{rm nat}$$Ta samples irradiated with 22-40 MeV deuteron beams, we have carried out the irradiation experiment of the main elements of the IFMIF candidate materials by using the deutron beam of the AVF cyclotron of the TIARA facility in JAERI/Takasaki.

Journal Articles

Progress in the blanket neutronics experiments at JAERI/FNS

Sato, Satoshi; Verzilov, Y. M.; Ochiai, Kentaro; Nakao, Makoto*; Wada, Masayuki*; Kubota, Naoyoshi; Kondo, Keitaro; Yamauchi, Michinori*; Nishitani, Takeo

Fusion Engineering and Design, 81(8-14), p.1183 - 1193, 2006/02

 Times Cited Count:17 Percentile:77.1(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Measurements of deuteron-induced activation cross sections for vanadium, iron, nickel and tantalum in 14-40 MeV region

Nakao, Makoto*; Ochiai, Kentaro; Kubota, Naoyoshi; Sato, Satoshi; Ishioka, Noriko; Nishitani, Takeo

JAEA-Review 2005-001, TIARA Annual Report 2004, p.283 - 285, 2006/01

Measurements of deuteron-induced activation cross sections for IFMIF accelerator structural materials (vanadium, iron, nickel and tantalum) were performed. In this work, we have obtained the cross sections for $$^{51}$$V(d,x)$$^{49}$$Cr, $$^{nat}$$Fe(d,x)$$^{55,56}$$Co, $$^{nat}$$Ni(d,x)$$^{55}$$Co, $$^{60,61}$$Cu and $$^{181}$$Ta(d,x)$$^{178,180}$$Ta reactions in 14-40 MeV region. These cross sections will be compared with other experimental ones and calculated value.

Journal Articles

Experimental studies on tungsten-armour impact on nuclear responses of solid breeding blanket

Sato, Satoshi; Nakao, Makoto*; Verzilov, Y. M.; Ochiai, Kentaro; Wada, Masayuki*; Kubota, Naoyoshi; Kondo, Keitaro; Yamauchi, Michinori*; Nishitani, Takeo

Nuclear Fusion, 45(7), p.656 - 662, 2005/07

 Times Cited Count:8 Percentile:30.16(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Neutronics experiments using small partial mockups of the ITER test blanket module with a solid breeder

Sato, Satoshi; Verzilov, Y. M.; Nakao, Makoto*; Ochiai, Kentaro; Wada, Masayuki*; Nishitani, Takeo

Fusion Science and Technology, 47(4), p.1046 - 1051, 2005/05

 Times Cited Count:12 Percentile:65.49(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Fusion neutron skyshine experiment at FNS

Nakao, Makoto*; Nishitani, Takeo; Ochiai, Kentaro

FAPIG, (168), p.9 - 13, 2004/11

Fusion neutron skyshine experiment have been carried out at the FNS(Fusion Neutronics Source) facility of Japan Atomic Energy Research and Institute. In this experiment, the skyshine port located just above the tritium target from which fusion neutron produced was open and the radiation dose rate of skyshine neutron that went out through the skyshine port was measured as far as about 550 m away from the tritium target with a spherical rem-counter. The measured neutron dose rate was compared with the calculation value by Monte Carlo simulation code MCNP-4B and a simple line source model.

Journal Articles

Measurements of deuteron-induced activation cross sections for IFMIF accelerator structural materials in 22-40 MeV region

Nakao, Makoto*; Hori, Junichi*; Ochiai, Kentaro; Sato, Satoshi; Yamauchi, Michinori*; Ishioka, Noriko; Nishitani, Takeo

JAERI-Review 2004-025, TIARA Annual Report 2003, p.245 - 247, 2004/11

Measurements of deuteron-induced activation cross sections for IFMIF(International Fusion Materials Irradiation Facility) accelerator structural materials(aluminum,copper,tungsten) were performed by using the AVF cyclotron in TIARA. We obtained the activation cross sections for the reactions $$^{27}$$Al(d,x)$$^{27}$$Mg, $$^{24}$$Na, $$^{nat}$$Cu(d,x)$$^{62,63}$$Zn, $$^{61,64}$$Cu, and $$^{nat}$$W(d,x)$$^{187}$$W, $$^{181-184,186}$$Re in 22-40 MeV rigion. The present results were compared with other experimental ones and the data in the ACSELAM library.

JAEA Reports

Integral experiments for verification of tritium production on the beryllium/lithium titanate blanket mock-up with a one-breeder layer

Verzilov, Y. M.; Sato, Satoshi; Nakao, Makoto*; Ochiai, Kentaro; Wada, Masayuki*; Nishitani, Takeo

JAERI-Research 2004-015, 55 Pages, 2004/10

JAERI-Research-2004-015.pdf:3.29MB

no abstracts in English

Journal Articles

Measurements of deuteron-induced activation cross sections for IFMIF accelerator structural materials

Nakao, Makoto*; Hori, Junichi*; Ochiai, Kentaro; Sato, Satoshi; Yamauchi, Michinori*; Ishioka, Noriko; Nishitani, Takeo

Proceedings of International Conference on Nuclear Data for Science and Technology (ND 2004), p.1489 - 1492, 2004/09

no abstracts in English

Journal Articles

D-T neutron skyshine experiments and the MCNP analysis

Nishitani, Takeo; Ochiai, Kentaro; Yoshida, Shigeo*; Tanaka, Ryohei*; Wakisaka, Masashi*; Nakao, Makoto*; Sato, Satoshi; Yamauchi, Michinori*; Hori, Junichi; Wada, Masayuki*; et al.

Journal of Nuclear Science and Technology, 41(Suppl.4), p.58 - 61, 2004/03

no abstracts in English

Journal Articles

Initial results of neutronics experiments for evaluation of tritium production rate in solid breeding blanket

Nishitani, Takeo; Ochiai, Kentaro; Klix, A.; Verzilov, Y. M.; Sato, Satoshi; Yamauchi, Michinori*; Nakao, Makoto*; Hori, Junichi; Enoeda, Mikio

Proceedings of 20th IEEE/NPSS Symposium on Fusion Engineering (SOFE 2003), p.454 - 457, 2003/10

no abstracts in English

Journal Articles

Preliminary neutronic estimation for demo blanket with beryllide

Yamada, Hirokazu*; Nagao, Yoshiharu; Kawamura, Hiroshi; Nakao, Makoto*; Uchida, Munenori*; Ito, Haruhiko

Fusion Engineering and Design, 69(1-4), p.269 - 273, 2003/09

 Times Cited Count:13 Percentile:66.42(Nuclear Science & Technology)

no abstracts in English

Journal Articles

Measurement of radiation skyshine with D-T neutron source

Yoshida, Shigeo*; Nishitani, Takeo; Ochiai, Kentaro; Kaneko, Junichi*; Hori, Junichi; Sato, Satoshi; Yamauchi, Michinori*; Tanaka, Ryohei*; Nakao, Makoto*; Wada, Masayuki*; et al.

Fusion Engineering and Design, 69(1-4), p.637 - 641, 2003/09

 Times Cited Count:7 Percentile:47.54(Nuclear Science & Technology)

no abstracts in English

24 (Records 1-20 displayed on this page)