ICRH current ramp discharges and Alfven cascades in alcator C-mod

被引：0

作者：

Porkolab, M ^{[1
]}

Edlund, E ^{[1
]}

Snipes, J ^{[1
]}

Wukitch, S ^{[1
]}

Basse, N ^{[1
]}

Bonoli, P ^{[1
]}

Boswell, C ^{[1
]}

Fiore, C ^{[1
]}

Gorelenkov, N ^{[1
]}

Hubbard, A ^{[1
]}

Kramer, GJ ^{[1
]}

Lin, L ^{[1
]}

Lin, Y ^{[1
]}

Marmar, E ^{[1
]}

Schilling, G ^{[1
]}

机构：

[1] MIT Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

来源：

Radio Frequency Power in Plasmas | 2005年 / 787卷

关键词：

D O I：

暂无

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：

Current ramp experiments with intense ICRF power injected early in the ramp phase in Alcator C-Mod have been carried out. The goal of these experiments is to produce suitable reversed shear (RS) target plasmas for future Advanced Tokamak (AT) plasma research. Future plans call for off-axis injection of Lower Hybrid current drive (LHCD) to maintain the RS plasmas while increasing beta with additional ICRH1. In the present experiments evidence of RS q-profiles has been demonstrated in the ramp stage of the discharge with the observation of Alfven-Cascades (or Reversed Shear Alfven-Eigenmodes or RSAE) driven by the energetic ICRF, ion tail. The frequencies are in agreement with NMD code predictions. Evidence of sawtooth delay has also been observed by increasing the injected ICRF power.

引用

页码：114 / 117

页数：4

共 9 条

[1] Negative magnetic shear modes of operation in the Alcator C-Mod tokamak near the beta limit [J].