在紧凑型螺旋系统的热电子模等离子体中观测到与<E(r)×B(直θ)>漂移方向反平行的环形流。

Observation of toroidal flow antiparallel to the <E(r) x B(straight theta)> drift direction in the hot electron mode plasmas in the compact helical system.

作者信息

Ida K, Minami T, Yoshimura Y, Fujisawa A, Suzuki C, Okamura S, Nishimura S, Isobe M, Iguchi H, Itoh K, Kado S, Liang Y, Nomura I, Osakabe M, Takahashi C, Tanaka K, Matsuoka K

机构信息

National Institute for Fusion Science, Toki 509-5292, Japan.

出版信息

Phys Rev Lett. 2001 Apr 2;86(14):3040-3. doi: 10.1103/PhysRevLett.86.3040.

DOI:10.1103/PhysRevLett.86.3040

PMID:11290102

Abstract

A toroidal flow antiparallel to the <E(r) x B(straight theta)> drift direction is observed in the hot electron mode plasmas when a large positive electric field and a sharp electron temperature gradient are sustained inside the internal transport barrier in the Compact Helical System. This toroidal flow reaches up to 5x10(4) m/s at the plasma center, and it is large enough to reverse the toroidal flow driven by a tangentially injected neutral beam. These observations clearly show the plasma favors flow in the minimum nablaB direction at the transport barrier.

摘要

在紧凑型螺旋装置的内部输运垒内维持大的正电场和陡峭的电子温度梯度时，在热电子模等离子体中观察到与<E(r)×B(直θ)>漂移方向反平行的环形流。该环形流在等离子体中心达到高达5×10⁴米/秒，其大小足以反转由切向注入中性束驱动的环形流。这些观测结果清楚地表明，在输运垒处等离子体倾向于沿最小▽B方向流动。