Transition from L mode to high ion temperature mode in CHS heliotron/torsatron plasmas

被引：24

作者：

Ida, K

Osakabe, M

Tanaka, K

Minami, T

Nishimura, S

Okamura, S

Fujisawa, A

Yamazaki, K

Yoshimura, Y

Kubo, S

Akiyama, R

Darrow, DS

Idei, H

Iguchi, H

Isobe, M

Kado, S

Kondo, T

Lee, S

Matsuoka, K

Morita, S

Nomura, I

Ohdachi, S

Sasao, M

Shimizu, A

Takagi, S

Takahashi, C

Takayama, S

Takechi, M

Toi, K

Tsumori, K

Watari, T

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[2] Grad Univ Adv Studies, Hayama, Japan

[3] Nagoya Univ, Dept Energy Engn Sci, Nagoya, Aichi, Japan

来源：

NUCLEAR FUSION | 1999年 / 39卷 / 11Y期

关键词：

D O I：

10.1088/0029-5515/39/11Y/304

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

A high ion temperature (T-i) mode is observed for neutral beam heated plasmas in the Compact Helical System (CHS) heliotron/torsatron. The high T-i mode plasma is characterized by a high central ion temperature, T-i(0), and is associated with a peaked electron density profile produced by neutral beam fuelling with low wall recycling. Transition from L mode to high T-i mode has been studied in CHS. T-i(0) in the high T-i mode discharges reaches 1 keV, which is 2.5 times higher than that in the L mode discharges. The ion thermal diffusivity is significantly reduced by a factor of more than 2-3 in the high T-i mode plasma. The ion loss cone is observed in neutral particle flux in the energy range 1-6 keV with a narrow range of pitch angle (90 degrees +/- 20 degrees) in the high T-i mode. However, the degradation of ion energy confinement due to this loss cone is negligible.

引用

页码：1649 / 1658

页数：10

共 50 条

[31] ηi-mode in toroidal plasmas with anisotropic ion temperature and its gradient
Jia, M. X.
Li, J. C.
Liu, S. F.
Kong, W.
Zhu, K. E.
Dong, J. Q.
NUCLEAR FUSION, 2021, 61 (04)
[32] Global mode analysis of ideal magnetohydrodynamic modes in a heliotron/torsatron system: I. Mercier-unstable equilibria
Chen, J
Nakajima, N
Okamoto, M
PHYSICS OF PLASMAS, 1999, 6 (05) : 1562 - 1574
[33] Global mode analysis of ideal magnetohydrodynamic modes in a heliotron/torsatron system: I. Mercier-unstable equilibria
Chen, J.
Nakajima, N.
Okamoto, M.
Physics of Plasmas, 1999, 6 (5 I): : 1562 - 1574
[34] Trapped ion mode in toroidally rotating plasmas
Phys Plasmas, 9 (3384):
[35] L to H mode transition: parametric dependencies of the temperature threshold
Bourdelle, C.
Chone, L.
Fedorczak, N.
Garbet, X.
Beyer, P.
Citrin, J.
Delabie, E.
Dif-Pradalier, G.
Fuhr, G.
Loarte, A.
Maggi, C. F.
Militello, F.
Sarazin, Y.
Vermare, L.
Abhangi, M.
Abreu, P.
Aftanas, M.
Afzal, M.
Aggarwal, K. M.
Aho-Mantila, L.
Ahonen, E.
Aints, M.
Airila, M.
Albanese, R.
Alegre, D.
Alessi, E.
Aleynikov, P.
Alfier, A.
Alkseev, A.
Allan, P.
Almaviva, S.
Alonso, A.
Alper, B.
Alsworth, I.
Alves, D.
Ambrosino, G.
Ambrosino, R.
Amosov, V.
Andersson, F.
Andersson Sunden, E.
Angelone, M.
Anghel, A.
Anghel, M.
Angioni, C.
Appel, L.
Apruzzese, G.
Arena, P.
Ariola, M.
Arnichand, H.
Arnoux, G.
NUCLEAR FUSION, 2015, 55 (07)
[36] TRAPPED ION MODE IN TOROIDALLY ROTATING PLASMAS
ARTUN, M
TANG, WM
REWOLDT, G
PHYSICS OF PLASMAS, 1995, 2 (09) : 3384 - 3400
[37] A model equation of high-n TAE and ballooning modes in a L=2 heliotron/torsatron system
Nakajima, N
ICPP 96 CONTRIBUTED PAPERS - PROCEEDINGS OF THE 1996 INTERNATIONAL CONFERENCE ON PLASMA PHYSICS, VOLS 1 AND 2, 1997, : 158 - 161
[38] Transition to self-organized high confinement states in tokamak plasmas - Transition to H-mode in tokamak plasmas
Guzdar, PN
Kleva, RG
Groebner, RJ
Gohil, P
Nonequilibrium Phenomena in Plasmas, 2005, 321 : 219 - 237
[39] A jump in temperature gradient induced by the transition from density-gradient to temperature-gradient driven mode in L-mode edge
Kim, J. Y.
Han, H. S.
PHYSICS OF PLASMAS, 2018, 25 (10)
[40] ELECTRON-TEMPERATURE PROFILE INVARIANCE IN OH-MODE, L-MODE AND H-MODE PLASMAS AND CONSEQUENCES FOR THE ANOMALOUS TRANSPORT
BECKER, G
NUCLEAR FUSION, 1992, 32 (01) : 81 - 88

← 1 2 3 4 5 →