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Journal Articles

Heating, current drive, and advanced plasma control in JFT-2M

Hoshino, Katsumichi; Yamamoto, Takumi; Tamai, Hiroshi; Oasa, Kazumi; Kawashima, Hisato; Miura, Yukitoshi; Ogawa, Toshihide; Shoji, Teruaki*; Shibata, Takatoshi; Kikuchi, Kazuo; et al.

Fusion Science and Technology, 49(2), p.139 - 167, 2006/02

 Times Cited Count:2 Percentile:81.1(Nuclear Science & Technology)

The main results obtained by the various heating and current drive systems, external coil system and divertor bias system are reviewed from the viewpoint of the advanced active control of the tokamak plasma. Also, the features of each system are described. The contribution of the JFT-2M in these areas are summarized.

Journal Articles

Concept and results of new operation scheme with improved control system for radio frequency heating in JT-60U

Moriyama, Shinichi; Shinozaki, Shinichi

Japanese Journal of Applied Physics, Part 1, 44(8), p.6224 - 6229, 2005/08

 Times Cited Count:0 Percentile:100(Physics, Applied)

The control system of RF heating system in JT-60U has been improved with a concept of dispersion processing and featuring a real time waveform shaping method. It is proper that the brand-new, dispersion processing system has higher performance and reliability than old single processor system before modification, however it is worthy of mention that improvement on operation roll sharing, using the real time waveform shaping, has enabled more efficient and smooth operation. The typical roll sharing is that a simple rectangular waveform of the RF heating power is set by the experiment operator, and the waveform is re-shaped with the parameter set by the RF operator who knows deeply the condition of the RF system at that time. The simple and flexible composition of the new control system will also enable further improvement of hardware to enhance plasma performance that is inevitable to the devices for fusion experiment.

JAEA Reports

Research and development plan of fusion technologies in JAERI toward DEMO reactors

Department of Fusion Engineering Research

JAERI-Review 2005-011, 139 Pages, 2005/03

JAERI-Review-2005-011.pdf:11.95MB

no abstracts in English

Journal Articles

Intelligible seminor on fusion reactors, 3; Plasma heating system to generate high temperature fusion palsmas

Inoue, Takashi; Sakamoto, Keishi

Nippon Genshiryoku Gakkai-Shi, 47(2), p.120 - 127, 2005/02

no abstracts in English

Journal Articles

Operational progress of the 110GHz-4MW ECRF heating system in JT-60U

Fujii, Tsuneyuki; Seki, Masami; Moriyama, Shinichi; Terakado, Masayuki; Shinozaki, Shinichi; Hiranai, Shinichi; Shimono, Mitsugu; Hasegawa, Koichi; Yokokura, Kenji; JT-60 Team

Journal of Physics; Conference Series, 25, p.45 - 50, 2005/00

The JT-60U electron cyclotron range of frequency (ECRF) is utilized to realize high performance plasma. Its output power is 4 MW at 110 GHz. By controlling the anode voltage of the gyrotron used in the JT-60U ECRF heating system, the gyrotoron output can be controlled. Then, the anode voltage controller was developed to modulate the injected power into plasmas. This low cost controller achieved the modulation frequency 12 - 500 Hz at 0.7 MW. This controller also extended the pulse width from 5s to 16 s at 0.5 MW. For these long pulses, temperature rise of the DC break made of Alumina ceramics is estimated. Its maximum temperature becomes $$sim$$ 140 deg. From the analysis of this temperature rise, DC break materials should be changed to low loss materials for the objective pulse width of 30 s. The stabilization of neoclassical tearing mode (NTM) was demonstrated by ECRF heating using the real-time system in which the ECRF beams are injected to the NTM location predicted from ECE measurement every 10 ms.

JAEA Reports

Neutronic studies of bare targets for JAERI 5MW pulsed spallation neutron source

Teshigawara, Makoto*; Watanabe, Noboru*; Takada, Hiroshi; Nakashima, Hiroshi; *; Oyama, Yukio; Kosako, Kazuaki*

JAERI-Research 99-010, 16 Pages, 1999/02

JAERI-Research-99-010.pdf:0.86MB

no abstracts in English

Journal Articles

ITER physics basis, 6; Plasma auxiliary heating and current drive

ITER Physics Expert Group on Energetic Particles, Heating and Current Drive

Nuclear Fusion, 39(12), p.2495 - 2539, 1999/00

no abstracts in English

Journal Articles

Production of sheared flow during ion cyclotron resonance heating in tokamak plasmas

C.G.Liu*; Yamagiwa, Mitsuru; S.J.Qian*

Physics of Plasmas, 4(8), p.2788 - 2790, 1997/08

 Times Cited Count:3 Percentile:86.1(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Production of sheared flow by means of ICRF heating in tokamak plasmas

C.Liu*; Yamagiwa, Mitsuru; S.Qian*

JAERI-Research 96-068, 17 Pages, 1997/01

JAERI-Research-96-068.pdf:0.84MB

no abstracts in English

Journal Articles

Gamma-ray measurements in JT-60U ICRF heated plasma

Kondoh, Takashi; Kimura, Haruyuki; Kusama, Yoshinori; Morioka, Atsuhiko; Moriyama, Shinichi; Saigusa, Mikio; Nagashima, Keisuke; Yoshino, Ryuji; Harano, Hideki*

Purazuma, Kaku Yugo Gakkai-Shi, 72(12), p.1397 - 1405, 1996/12

no abstracts in English

Journal Articles

Effects of radio-frequency-induced radial diffusion on triton burnup

Yamagiwa, Mitsuru

Physics of Plasmas, 1(1), p.205 - 207, 1994/01

 Times Cited Count:4 Percentile:71.6(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Study of combined NBI and ICRF enhancement of the D-$$^{3}$$He fusion yield with a Fokker-Planck code

Yamagiwa, Mitsuru; Kishimoto, Yasuaki; Fujii, Tsuneyuki; Kimura, Haruyuki

Nuclear Fusion, 33(3), p.493 - 500, 1993/00

 Times Cited Count:4 Percentile:68.97(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Test results of X2242 and X2274 high power tetrodes with the JT-60 ICRF amplifier in a frequency range of 110-130MHz

Moriyama, Shinichi; *; Fujii, Tsuneyuki; ; ; Terakado, Masayuki; Kimura, Haruyuki; Saigusa, Mikio; Nagashima, Takashi; Ota, Mitsuru; et al.

Fusion Engineering and Design, 19, p.41 - 52, 1992/00

 Times Cited Count:8 Percentile:36.81

no abstracts in English

Journal Articles

D-$$^{3}$$He fusion yield with higher harmonic ICRF heating of $$^{3}$$He beams

Yamagiwa, Mitsuru; Kimura, Haruyuki

Nuclear Fusion, 31(8), p.1519 - 1526, 1991/00

 Times Cited Count:4 Percentile:70.54(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

D-He$$^{3}$$ fusion yield in higher harmonic ICRF heated plasma

Yamagiwa, Mitsuru; Kimura, Haruyuki; Takizuka, Tomonori; Fujii, Tsuneyuki

Proc. of the 17th EPS Conf. on Controlled Fusion and Plasma Heating, p.1007 - 1010, 1990/00

no abstracts in English

Journal Articles

Simulation of high Q plasma by ICRF heating of alpha particles

Yamagiwa, Mitsuru; Kimura, Haruyuki; Takizuka, Tomonori

Nuclear Fusion, 29(10), p.1799 - 1806, 1989/10

 Times Cited Count:1 Percentile:96.91(Physics, Fluids & Plasmas)

no abstracts in English

JAEA Reports

Conceptual design study of fusion experimental reactor FY86 FER; RE heating and current drive system design

Nakajima, Kunihiko*; *; *

JAERI-M 87-154, 106 Pages, 1987/09

JAERI-M-87-154.pdf:2.49MB

no abstracts in English

Journal Articles

Measurement of secondary electron emission coefficient of wall materials using auger electron spectromter

Hiroki, S.; ; ; Murakami, Yoshio

Shinku, 30(1), p.14 - 21, 1987/01

no abstracts in English

JAEA Reports

JAEA Reports

Measurement of Secondary Electron Emission Coefficient of Wall Materials Using Auger Electron Spectroscopy

Hiroki, S.; ; *; ; Murakami, Yoshio

JAERI-M 85-123, 23 Pages, 1985/08

JAERI-M-85-123.pdf:0.71MB

no abstracts in English

27 (Records 1-20 displayed on this page)