Electron thermal transport barrier and density fluctuation reduction in a toroidal helical plasma

被引:150
作者
Fujisawa, A
Iguchi, H
Minami, T
Yoshimura, Y
Sanuki, H
Itoh, K
Lee, S
Tanaka, K
Yokoyama, M
Kojima, M
Itoh, SI
Okamura, S
Akiyama, R
Ida, K
Isobe, M
Morita, S
Nishimura, S
Osakabe, M
Shimizu, A
Takahashi, C
Toi, K
Hamada, Y
Matsuoka, K
Fujiwara, M
机构
[1] Natl Inst Fus Sci, Toki 50952, Japan
[2] Kyushu Univ, RIAM, Kasuga, Fukuoka 816, Japan
关键词
D O I
10.1103/PhysRevLett.82.2669
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
A thermal transport barrier resulting in a high central electron temperature of similar to 2 keV is established in the core of electron-cyclotron-resonance heated plasmas of the Compact Helical System Heliotron/Torsatron. The formation of the barrier is correlated with the reduction in the density fluctuations and with a structural change of the radial electric field profile at the barrier location. The results suggest that the decrease in fluctuation should contribute to a reduction of anomalous transport and a drastic increase in electron temperature at the barrier. [S0031-9007(99)08825-0].
引用
收藏
页码:2669 / 2672
页数:4
相关论文
共 30 条
[1]   Poloidal rotation in TFTR reversed shear plasmas [J].
Bell, RE ;
Levinton, FM ;
Batha, SH ;
Synakowski, EJ ;
Zarnstorff, MC .
PHYSICAL REVIEW LETTERS, 1998, 81 (07) :1429-1432
[2]   INFLUENCE OF SHEARED POLOIDAL ROTATION ON EDGE TURBULENCE [J].
BIGLARI, H ;
DIAMOND, PH ;
TERRY, PW .
PHYSICS OF FLUIDS B-PLASMA PHYSICS, 1990, 2 (01) :1-4
[3]   Confinement in W7-AS and the role of radial electric field and magnetic shear [J].
Brakel, R ;
Anton, M ;
Baldzuhn, J ;
Burhenn, R ;
Erckmann, V ;
Fiedler, S ;
Geiger, J ;
Hartfuss, HJ ;
Heinrich, O ;
Hirsch, M ;
Jaenicke, R ;
Kick, M ;
Kuhner, G ;
Maassberg, H ;
Stroth, U ;
Wagner, F ;
Weller, A .
PLASMA PHYSICS AND CONTROLLED FUSION, 1997, 39 :B273-B286
[4]  
Crume, 1989, PLASMA PHYS CONTROLL, V2, P13
[5]   Dynamics of transition to enhanced confinement in reversed magnetic shear discharges [J].
Diamond, PH ;
Lebedev, VB ;
Newman, DE ;
Carreras, BA ;
Hahm, TS ;
Tang, WM ;
Rewoldt, G ;
Avinash, K .
PHYSICAL REVIEW LETTERS, 1997, 78 (08) :1472-1475
[6]   Dynamic behavior of potential in the plasma core of the CHS heliotron/torsatron [J].
Fujisawa, A ;
Iguchi, H ;
Sanuki, H ;
Itoh, K ;
Lee, S ;
Hamada, Y ;
Kubo, S ;
Idei, H ;
Crowley, TP ;
Akiyama, R ;
Tanaka, K ;
Minami, T ;
Ida, K ;
Nishimura, S ;
Morita, S ;
Kojima, M ;
Hidekuma, S ;
Itoh, SI ;
Takahashi, C ;
Inoue, N ;
Suzuki, H ;
Okamura, S ;
Matsuoka, K .
PHYSICAL REVIEW LETTERS, 1997, 79 (06) :1054-1057
[7]   Discovery of electric pulsation in a toroidal helical plasma [J].
Fujisawa, A ;
Iguchi, H ;
Idei, H ;
Kubo, S ;
Matsuoka, K ;
Okamura, S ;
Tanaka, K ;
Minami, T ;
Ohdachi, S ;
Morita, S ;
Zushi, H ;
Lee, S ;
Osakabe, M ;
Akiyama, R ;
Yoshimura, Y ;
Toi, K ;
Sanuki, H ;
Itoh, K ;
Shimizu, A ;
Takagi, S ;
Ejiri, A ;
Takahashi, C ;
Kojima, M ;
Hidekuma, S ;
Ida, K ;
Nishimura, S ;
Isobe, M ;
Inoue, N ;
Sakamoto, R ;
Itoh, SI ;
Hamada, Y ;
Fujiwara, M .
PHYSICAL REVIEW LETTERS, 1998, 81 (11) :2256-2259
[8]   Consideration of fluctuation in secondary beam intensity of heavy ion beam probe measurements [J].
Fujisawa, A ;
Iguchi, H ;
Lee, S ;
Hamada, Y .
REVIEW OF SCIENTIFIC INSTRUMENTS, 1997, 68 (09) :3393-3399
[9]   THEORY OF IMPROVED CONFINEMENT IN HIGH-BETA(P) TOKAMAKS [J].
FUKUYAMA, A ;
ITOH, K ;
ITOH, SI ;
YAGI, M ;
AZUMI, M .
PLASMA PHYSICS AND CONTROLLED FUSION, 1994, 36 (09) :1385-1390
[10]   THE AMBIPOLAR ELECTRIC-FIELD IN STELLARATORS [J].
HASTINGS, DE ;
HOULBERG, WA ;
SHAING, KC .
NUCLEAR FUSION, 1985, 25 (04) :445-454