STEADY-STATE CONVECTION AND FLUCTUATION-DRIVEN PARTICLE-TRANSPORT IN THE H-MODE TRANSITION

被引：104

作者：

TYNAN, GR

SCHMITZ, L

CONN, RW

DOERNER, R

LEHMER, R

机构：

[1] Institute for Plasma and Fusion Research, University of California, Los Angeles

来源：

PHYSICAL REVIEW LETTERS | 1992年 / 68卷 / 20期

关键词：

D O I：

10.1103/PhysRevLett.68.3032

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Large-scale steady-state convection is found to dominate the particle transport just inside the last closed flux surface (LCFS) in Ohmic discharges in the CCT tokamak. Near the limiter radius and in the scrape-off layer, fluctuation-induced transport is prevalent. At the L-H transition, the convection pattern near the LCFS is disrupted and a more poloidally symmetric, near-sonic plasma flow develops. Convective and turbulent particle transport are reduced across the entire edge region, resulting in the formation of the H-mode edge transport barrier.

引用

页码：3032 / 3035

页数：4

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