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Ozeki, Takahisa; JT-60 Team
Physics of Plasmas, 14(5), p.056114_1 - 056114_12, 2007/05
Times Cited Count：4 Percentile：15.02(Physics, Fluids & Plasmas)no abstracts in English
n modes in JT-60UBriguglio, S.*; Fogaccia, G.*; Vlad, G.*; Zonca, F.*; Shinohara, Koji; Ishikawa, Masao; Takechi, Manabu
Physics of Plasmas, 14(5), p.055904_1 - 055904_10, 2007/05
Times Cited Count：42 Percentile：79.43(Physics, Fluids & Plasmas)Fukuda, Yuji; Akahane, Yutaka; Aoyama, Makoto; Hayashi, Yukio; Homma, Takayuki; Inoue, Norihiro*; Kando, Masaki; Kanazawa, Shuhei; Kiriyama, Hiromitsu; Kondo, Shuji; et al.
Physics Letters A, 363(2-3), p.130 - 135, 2007/02
Collimated relativistic electrons up to 58 MeV with an electron charge of 2.1 nC were generated by the interaction of intense laser pulses with the Ar cluster target at the laser intensity of 3.5
10
W/cm
. The resulting spectrum does not fit a Maxwellian distribution, but is well described by a two-temperature Maxwellian, which indicates two mechanisms of the electron acceleration. Two dimensional particle-in-cell simulations demonstrate an important role of clusters. The higher energy electrons are injected when they are expelled from the clusters by the laser pulse field. They then gain their energy during the direct acceleration by the laser pulse, whose phase velocity in the underdense plasma is larger than speed of light in vacuum. The lower energy electrons, which are injected during the plasma wave breaking, are accelerated by the wakefield.
Fujita, Takaaki; JT-60 Team
Physics of Plasmas, 13(5), p.056112_1 - 056112_10, 2006/05
Times Cited Count：5 Percentile：18.19(Physics, Fluids & Plasmas)no abstracts in English
plasmas through stability control in Japan Atomic Energy Research Institute tokamak-60 upgradeIsayama, Akihiko; JT-60 Team
Physics of Plasmas, 12(5), p.056117_1 - 056117_10, 2005/05
Times Cited Count：28 Percentile：65.6(Physics, Fluids & Plasmas)no abstracts in English
Miura, Yukitoshi; JT-60 Team
Physics of Plasmas, 10(5), p.1809 - 1815, 2003/05
Times Cited Count：10 Percentile：31.59(Physics, Fluids & Plasmas)no abstracts in English
Kubo, Hirotaka; JT-60 Team
Physics of Plasmas, 9(5), p.2127 - 2133, 2002/05
Times Cited Count：18 Percentile：50.76(Physics, Fluids & Plasmas)no abstracts in English
Takenaga, Hidenobu; JT-60 Team
Physics of Plasmas, 8(5), p.2217 - 2223, 2001/05
Times Cited Count：44 Percentile：76.85(Physics, Fluids & Plasmas)no abstracts in English
Ide, Shunsuke; JT-60 Team
Physics of Plasmas, 7(5), p.1927 - 1934, 2000/05
Times Cited Count：21 Percentile：54.4(Physics, Fluids & Plasmas)no abstracts in English
Niimi, Hironobu*; Ogawa, Toshihide; Ogawa, Hiroaki; Fukumoto, Naoyuki*; Kimura, Haruyuki; Miura, Yukitoshi; Shibata, Takatoshi; Nagata, Masayoshi*; Yatsu, Shigeo*; Uyama, Tadao*; et al.
Proceedings of 2000 International Congress on Plasma Physics (ICPP 2000), Vol.3, p.768 - 771, 2000/00
no abstracts in English
Saigusa, Mikio*; Kanazawa, Sadayoshi; Ogawa, Toshihide; Ido, Takeshi*; Kawashima, Hisato; Kikuchi, Kazuo; Fukuyama, Atsushi*; Kamiya, Kensaku; JFT-2M Team
Proceedings of 2000 International Congress on Plasma Physics (ICPP 2000), Vol.3, p.844 - 847, 2000/00
no abstracts in English
Hosogane, Nobuyuki
Phys. Fluids B, 5(7), p.2412 - 2419, 1993/07
Times Cited Count：10 Percentile：38.4(Physics, Fluids & Plasmas)no abstracts in English
Peterson, B. J.*; Alekseyev, A. G.*; Konoshima, Shigeru; Ashikawa, Naoko*; Parchamy, H.*; Sasao, Mamiko*; Miura, Yukitoshi
no journal, ,
The imaging bolometer concept is based on a thin foil which absorbs the broad-band radiation and/or energetic particles from the plasma. The resulting temperature change in the foil is measured by an infrared camera located outside the vacuum vessel. Development of imaging bolometers is being carried out for application in bolometry and lost alpha diagnosis for fusion reactors. In the case of an imaging bolometer, placing the foil behind a pinhole camera provides a two-dimensional image of the plasma radiation. In the case of a lost alpha diagnostic the foil is placed behind multiple layers of thin foils with one dimension being used for energy discrimination and the other layer being used for pitch angle discrimination. The work described includes the operation of imaging bolometers on the Large Helical Device and the JT-60U Tokamak, calibration experiments, testing prototype lost alpha diagnostic detectors on an ion beam facility and the design of an imaging bolometer and a lost alpha diagnostic for ITER.
Aiba, Nobuyuki; Tokuda, Shinji; Ishizawa, Tomoko*; Ozeki, Takahisa
no journal, ,
no abstracts in English
Ishii, Yasutomo; Azumi, Masafumi; Smolyakov, A. I.*
no journal, ,
no abstracts in English
tokamak plasmasKagei, Yasuhiro; Kishimoto, Yasuaki; Miyoshi, Takahiro*
no journal, ,
no abstracts in English
Kagei, Yasuhiro; Kishimoto, Yasuaki; Miyoshi, Takahiro*; Takechi, Manabu
no journal, ,
no abstracts in English
Yogo, Akifumi; Daido, Hiroyuki; Mori, Michiaki; Sagisaka, Akito; Ogura, Koichi; Orimo, Satoshi; Kiriyama, Hiromitsu; Pirozhkov, A. S.; Kanazawa, Shuhei; Nakai, Yoshiki; et al.
no journal, ,
We report the result on a novel online analysis of fast ions generated in an ultraintense laser-foil interaction. Fast protons are observed by a time-of-flight (TOF) detector, which is precisely calibrated using proton beams from an ion accelerator as to its detection efficiency depending on the proton energy. The TOF detector provides shot-to-shot energy distributions of protons immediately after the irradiation of a high-intensity laser pulse of 10
W/cm
. Definite correlations are found between the prepulse intensity and the high energy cutoff of protons as well as the conversion efficiency of the laser energy into the proton energy, governing the stability of the repetitive proton generation.
Kurita, Genichi; Bialek, J.*; Fujita, Takaaki; Tamai, Hiroshi; Matsukawa, Makoto; Matsunaga, Go; Takechi, Manabu; Tsuda, Takashi; Ozeki, Takahisa; Navratil, G. A.*; et al.
no journal, ,
JT-60SA is a tokamak device, being now designed at JAEA with collaboration of EU. One of the main purpose of JT-60SA is to realize the steady state plasma with high normallized beta values, 3.5
5.5. Our previous analyses have shown that the critical normalized beta value was 3.8 with the effect of the stabilizing structure with finite resitivity and the active feedback control. The critical beta value is very low compared to the critical normalized beta of 5.5 in the case using ideal stabilizing structure, which results in very low C value of 0.37 and bad efficiency of feedback control. To overcome these, we consider the new configuration of stabilizing structure and feedbacck control coil. The analyses are being carried out by VALEN code developed in Columbia University for new equiilibrium including transport analyses of JT-60SA plasma. We also present the results of analyses of experimental data of current driven and pressure driven RWM in JT-60U tokamak.
Ishii, Yasutomo; Azumi, Masafumi; Smolyakov, A. I.*
no journal, ,
no abstracts in English
