PARALLEL CURRENTS IN THE SCRAPE-OFF LAYER OF JET DIVERTED DISCHARGES

被引：24

作者：

CHANKIN, AV

CLEMENT, S

DEKOCK, L

ERENTS, SK

HARBOUR, PJ

TAGLE, JA

机构：

[1] IV KURCHATOV ATOM ENERGY INST,MOSCOW,USSR

[2] UKAEA,CULHAM LAB,ABINGDON OX14 3DB,OXON,ENGLAND

来源：

JOURNAL OF NUCLEAR MATERIALS | 1992年 / 196卷

关键词：

D O I：

10.1016/S0022-3115(06)80134-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Systematic analysis of currents passing between the two strike zones in the scrape-off layer of JET single-null divertor discharges has been performed. Using a set of Langmuir probes, stretched across the target tiles in poloidal direction, the relation between the asymmetry in plasma parameters at the strike zones and parallel currents has been established. It has been found that the direction of edge currents was entirely determined by the plasma density and electron temperature distributions at the two strike zones, with the thermoelectric current being the major contribution to the net edge current. However, to match the whole set of data, the existing theory of Staebler and Hinton (Nucl. Fusion 29 (1989) 1820), which accounts for the thermoelectric current, had to be extended to comprise the effect of electron pressure imbalance between the two strike zones. The remarkable phenomenon of pressure imbalance in favour of ion strike zone is discussed.

引用

页码：739 / 744

页数：6

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