Cross-Field Motion of Plasma Blobs in an Open Magnetic Field Line Configuration

被引：107

作者：

Theiler, C. ^{[1
]}

Furno, I. ^{[1
]}

Ricci, P. ^{[1
]}

Fasoli, A. ^{[1
]}

Labit, B. ^{[1
]}

Mueller, S. H. ^{[1
,2
]}

Plyushchev, G. ^{[1
]}

机构：

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

[2] Univ Calif San Diego, Energy Res Ctr, La Jolla, CA 92093 USA

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 06期

关键词：

SCRAPE-OFF-LAYER; TURBULENCE; TRANSPORT; TOKAMAK; CONVECTION;

D O I：

10.1103/PhysRevLett.103.065001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The radial propagation of blobs generated from plasma instabilities is investigated in an open magnetic field line configuration. Blob cross-field velocities and sizes are obtained from internal probe measurements using pattern recognition. By varying the ion mass, the normalized vertical blob scale a approximate to is scanned from a approximate to < 1 to a approximate to > 1. An analytical expression for the blob velocity including cross-field ion polarization currents, parallel currents to the sheath, and ion-neutral collisions is derived and shows good quantitative agreement with the experimental data. In agreement with previous theoretical studies, this scaling shows that, for a approximate to < 1, the blob velocity is limited by cross-field ion polarization currents, while for a approximate to > 1 it is limited by parallel currents to the sheath.

引用

页数：4

共 32 条

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[Anonymous], PLASMA BOUNDARY MAGN

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