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Journal Articles

Response of toroidal rotation velocity to electron cyclotron wave injection in JT-60U

Sakamoto, Yoshiteru; Ide, Shunsuke; Yoshida, Maiko; Koide, Yoshihiko; Fujita, Takaaki; Takenaga, Hidenobu; Kamada, Yutaka

Plasma Physics and Controlled Fusion, 48(5A), p.A63 - A70, 2006/05

 Times Cited Count:33 Percentile:23.64(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Toroidal electric field effect and non-linear effect on electron cyclotron current drive in JT-60U

Suzuki, Takahiro; Ide, Shunsuke; Hamamatsu, Kiyotaka; Petty, C. C.*; Lao, L. L.*; Isayama, Akihiko; Fujita, Takaaki; Ikeda, Yoshitaka; Seki, Masami; Moriyama, Shinichi; et al.

Purazuma, Kaku Yugo Gakkai-Shi, 80(6), p.511 - 515, 2004/06

no abstracts in English

Journal Articles

Heating and current drive by electron cyclotron waves in JT-60U

Suzuki, Takahiro; Ide, Shunsuke; Hamamatsu, Kiyotaka; Isayama, Akihiko; Fujita, Takaaki; Petty, C. C.*; Ikeda, Yoshitaka; Kajiwara, Ken*; Naito, Osamu; Seki, Masami; et al.

Nuclear Fusion, 44(7), p.699 - 708, 2004/05

 Times Cited Count:28 Percentile:30.75(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Comparison of electron internal transport barriers in the large helical device and JT-60U plasmas

Ida, Katsumi*; Fujita, Takaaki; Fukuda, Takeshi*; Sakamoto, Yoshiteru; Ide, Shunsuke; Toi, Kazuo*; Inagaki, Shigeru*; Shimozuma, Takashi*; Kubo, Shin*; Idei, Hiroshi*; et al.

Plasma Physics and Controlled Fusion, 46(5A), p.A45 - A50, 2004/05

 Times Cited Count:19 Percentile:43.57(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Direct evaluation of spatio-temporal change in current density profile applied to a discharge with neo-classical tearing mode

Suzuki, Takahiro; Oikawa, Toshihiro; Isayama, Akihiko; Fujita, Takaaki

Purazuma, Kaku Yugo Gakkai-Shi, 80(5), p.362 - 363, 2004/05

An analytical method to evaluate spatio-temporal change in current density profile directly from the motional Stark effect (MSE) diagnostic is applied to a discharge, where a neo-classical tearing mode (NTM) appeared and was stabilized by electron cyclotron current drive (ECCD). The analysis clearly shows spatially localized decrease in current density at the magnetic island location, implying decrease in bootstrap current due to flattening of pressure profile within the island. When the NTM is stabilized after the start of the ECCD application, increase in current density at the island location is observed.

Journal Articles

Results and future plan of JT-60U towards steady-state tokamak reactor

Sakurai, Shinji; JT-60 Team

Plasma Science and Technology, 6(1), p.2151 - 2158, 2004/02

 Times Cited Count:0 Percentile:100(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Profile control and plasma start-up by RF waves towards advanced tokamak operation in JT-60U

Takase, Yuichi*; JT-60 Team

AIP Conference Proceedings 694, p.235 - 242, 2003/05

A central electron temperature of 23 keV was obtained by EC wave injection. A highly localized current density profile was obtained by central ECCD, indicating an upper limit on the diffusion coefficient for resonant electrons of $$1{rm m^{2}/s}$$. The experimentally obtained current drive figure of merit was lower than theoretical prediction, possibly because of the negative loop voltage induced by overdrive. A comparison of HFS and LFS off-axis ECCD confirmed the theoretically expected trapped particle effect on the current drive efficiency. Offaxis LHCD was used to broaden the qmin radius and the ITB foot radius. N-NBCD was used to shrink the current hole radius. An integrated scenario consisting of (1) a novel plasma start-up method using RF plasma production and induction by vertical field and shaping coils, (2) a noninductive ramp-up stage, and (3) a transition to a high-density, bootstrap-dominated, highconfinement plasma, without the use of the OH solenoid, has been demonstrated. The plasma created by this technique had both internal and edge transport barriers, with $$beta_{rm p}=3.6$$($$epsilonbeta_{rm p}=1$$), $$beta_{rm N}=1.6$$, $$H_{rm H98y2}=1.6$$ and $$f_{rm BS}geq90%$$ at $$I_{rm p}=0.6$$MA and $$n_{rm e}=0.5n_{rm GW}$$.

Journal Articles

ECRF experiments for local heating and current drive by fundamental O-mode launch from the low-field side on JT-60U

Ikeda, Yoshitaka; Ide, Shunsuke; Suzuki, Takahiro; Kasugai, Atsushi; Takahashi, Koji; Kajiwara, Ken; Isayama, Akihiko; Oikawa, Toshihiro; Hamamatsu, Kiyotaka; Kamada, Yutaka; et al.

Nuclear Fusion, 42(4), p.375 - 382, 2002/04

 Times Cited Count:25 Percentile:35.89(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Measurement of current driven by electron cyclotron waves in JT-60U

Suzuki, Takahiro; Ide, Shunsuke; Oikawa, Toshihiro; Ikeda, Yoshitaka; Kajiwara, Ken; Isayama, Akihiko; Fujita, Takaaki; Hamamatsu, Kiyotaka; JT-60 Team

Plasma Physics and Controlled Fusion, 44(1), p.1 - 9, 2002/01

 Times Cited Count:16 Percentile:50.33(Physics, Fluids & Plasmas)

no abstracts in English

Journal Articles

Upgrade of ECH system in JT-60U featuring an antenna for toroidal/poloidal beam scan

Moriyama, Shinichi; Ikeda, Yoshitaka; Kajiwara, Ken; Seki, Masami; Sakamoto, Keishi; Takahashi, Koji; Imai, Tsuyoshi; Fujii, Tsuneyuki; JT-60 Team

AIP Conference Proceedings 595, p.322 - 325, 2001/11

no abstracts in English

Journal Articles

Initial results of electron cycloton range of frequency (ECRF) operation and experiments in JT-60U

Ikeda, Yoshitaka; Kasugai, Atsushi; Takahashi, Koji; Kajiwara, Ken; Isayama, Akihiko; Ide, Shunsuke; Terakado, Masayuki; Shinozaki, Shinichi; Yokokura, Kenji; Anno, Katsuto; et al.

Fusion Engineering and Design, 53(1-4), p.351 - 363, 2001/01

 Times Cited Count:34 Percentile:8.87(Nuclear Science & Technology)

no abstracts in English

Journal Articles

High power and long pulse ECRF system in JT-60U

Kajiwara, Ken; Kasugai, Atsushi; Takahashi, Koji; Ikeda, Yoshitaka; Imai, Tsuyoshi; Anno, Katsuto; Haga, Koichi*; Sakamoto, Keishi; Yokokura, Kenji; Shimono, Mitsugu; et al.

Journal of Plasma and Fusion Research SERIES, Vol.3, p.372 - 375, 2000/00

no abstracts in English

Journal Articles

Recent progress towards steady state tokamak operation with improved confinement in JT-60U

Fujita, Takaaki; JT-60 Team

Journal of Plasma and Fusion Research SERIES, Vol.3, p.87 - 93, 2000/00

no abstracts in English

Journal Articles

Characteristis of tearing modes in steady state high $$beta_{p}$$ H-mode discharges in JT-60U

Isayama, Akihiko; Kamada, Yutaka; Ozeki, Takahisa; Ide, Shunsuke

Proceedings of 10th International Toki Conference on Plasma Physics and Controlled Nuclear Fusion (ITC-10), p.94 - 98, 2000/00

no abstracts in English

JAEA Reports

Journal Articles

Recent RF activities on JT-60U

Ikeda, Yoshitaka; Fujita, Takaaki; Hamamatsu, Kiyotaka; Ide, Shunsuke; Imai, Tsuyoshi; Isayama, Akihiko; Iwase, Makoto; Kasugai, Atsushi; Kondoh, Takashi; Kusama, Yoshinori; et al.

AIP Conference Proceedings 485, p.279 - 287, 1999/09

no abstracts in English

JAEA Reports

Numerical analysis of electron cyclotron resonance heating on JT-60U and JFT-2M

Hamamatsu, Kiyotaka; Azumi, Masafumi

JAERI-M 94-062, 19 Pages, 1994/03

JAERI-M-94-062.pdf:0.71MB

no abstracts in English

Journal Articles

Measurement of anisotropic soft X-ray emission during radio-frequency current drive in the JFT-2M tokamak

Kawashima, Hisato; Hasegawa, Mitsuru*; Fuchs, G.*; Matoba, Toru; *; Hoshino, Katsumichi; Kawakami, Tomohide; Yamamoto, Takumi

Japanese Journal of Applied Physics, 33(6A), p.3590 - 3596, 1994/00

 Times Cited Count:4 Percentile:69.12(Physics, Applied)

no abstracts in English

Journal Articles

X-ray energy analysis for radio frequency current drive experiments in the DIII-D tokamak

Kawashima, Hisato; V.M.Trukhin*; J.Lohr*; R.W.Harvey*; R.James*; T.C.Luce*; C.C.Petty*; R.I.Pinsker*; R.Prater*

Japanese Journal of Applied Physics, 32(9A), p.3975 - 3984, 1993/09

 Times Cited Count:1 Percentile:90.82(Physics, Applied)

no abstracts in English

19 (Records 1-19 displayed on this page)
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