Current profile tailoring using localized electron cyclotron heating in highly elongated TCV plasmas

被引：18

作者：

Camenen, Y. ^{[1
]}

Hofmann, F. ^{[1
]}

Pochelon, A. ^{[1
]}

Scarabosio, A. ^{[1
]}

Alberti, S. ^{[1
]}

Arnoux, G. ^{[1
]}

Blanchard, P. ^{[1
]}

Coda, S. ^{[1
]}

Goodman, T. P. ^{[1
]}

Henderson, M. A. ^{[1
]}

Nelson-Melby, E. ^{[1
]}

Porte, L. ^{[1
]}

Sauter, O. ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Ctr Rech Phys Plasmas, Assoc Euratom Confederat Suisse, CH-1015 Lausanne, Switzerland

来源：

NUCLEAR FUSION | 2007年 / 47卷 / 07期

关键词：

D O I：

10.1088/0029-5515/47/7/010

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：

Radially localized electron cyclotron heating (ECH) at the 2nd harmonic (X2) is used to tailor the current profile through the modification of the temperature, and hence conductivity, profiles. The optimal conditions for current profile broadening are investigated and applied to decrease the plasma internal inductance at constant plasma current. Highly elongated plasmas are thus created at low current, where they are vertically unstable with peaked Ohmic current profiles, using active current profile broadening by far off-axis X2 ECH to ensure the vertical stability of IV the plasma. Central 3rd harmonic (X3) ECH is also applied and its impact on the current profile is described. The magnetohydrodynamic activity and in particular the replacement of the sawtooth by a multi-harmonics mode, resonant on the q = 1 surface and observed at high density and low internal inductance, is investigated.

引用

页码：586 / 598

页数：13

共 32 条

[1] Effects of localized electron heating and current drive on the sawtooth period [J].