Impact of a Langmuir Probe on Turbulence Measurements in the Scrape-Off-Layer of Tokamaks

被引：6

作者：

Colin, C. ^{[1
]}

Tamain, P. ^{[2
]}

Ghendrih, P. ^{[2
]}

Schwander, F. ^{[1
]}

Serre, E. ^{[1
]}

机构：

[1] Aix Marseille Univ, CNRS, M2P2, UMR 7340, F-13451 Marseille, France

[2] CEA Cadarache, Assoc Euratom CEA, Inst Rech Fus Magnet, F-13108 St Paul Les Durance, France

来源：

CONTRIBUTIONS TO PLASMA PHYSICS | 2014年 / 54卷 / 4-6期

关键词：

Scrape-Off-Layer; turbulent transport; interchange instability; synthetic measurement; Langmuir probes; TRANSPORT;

D O I：

10.1002/ctpp.201410087

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：

An issue for Langmuir probe measurements of SOL turbulence concerns the impact of the probe itself on plasma transport. The aim of this paper is to investigate this issue with a synthetic reconstruction of Langmuir probe measurements by inserting a synthetic probe into a 2D fluid SOL turbulence code. The effect of a biased probe is analysed as a function of its size. It is shown that the probe creates a transport barrier whose effect is non-local and affects the current's circulation in the plasma. The plasma density is depleted by the presence of the probe as well as the electrostatic potential. A strong impact on turbulence can also be observed. Such observations imply that the probed turbulence can differ significantly from the probe-free turbulence. (C) 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：543 / 548

页数：6

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