Towards Fast Measurement of the Electron Temperature in the SOL of ASDEX Upgrade Using Swept Langmuir Probes

被引：18
作者：
Mueller, H. W. [1 ]
Adamek, J. [2 ]
Horacek, J. [2 ]
Ionita, C. [3 ]
Mehlmann, F. [3 ]
Rohde, V. [1 ]
Schrittwieser, R. [2 ]
机构：
[1] EURATOM, Max Planck Inst Plasmaphys, Garching, Germany
[2] Assoc EURATOM IPP CR, Inst Plasma Phys, Prague, Czech Republic
[3] Univ Innsbruck, Inst Ion Phys & Appl Phys, Assoc EURATOM OAW, A-6020 Innsbruck, Austria
来源：
CONTRIBUTIONS TO PLASMA PHYSICS | 2010年 / 50卷 / 09期
基金：
奥地利科学基金会;
关键词：
Tokamak; Langmuir probe; swept probe; ball-pen probe; fast temperature measurement; ELM; SCRAPE-OFF LAYER; TRANSPORT; ELMS; BOUNDARY;
D O I：
10.1002/ctpp.201010144
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：
On ASDEX Upgrade first experiments were made using single probes with a voltage sweep frequency up to 100kHz. Possibilities and limitations using fast swept probes with a standard diagnostic and analysis tools are discussed. A good agreement between the data derived from fast swept single probe characteristics and floating as well as saturation current measurements was found. In a stationary (non ELMing) plasma the data of the fast swept probe are compared to standard slow swept probes (kHz range) showing an improvement of the measurement by faster sweeping. While ELM filaments already could be resolved the access of electron temperature fluctuations in small scale turbulence still has to be improved. Further comparisons are done in ELMy H-mode with combined ball-pen probe/floating potential measurements which can deliver electron temperatures with 25 mu s time resolution at reduced spatial resolution compared to pin probes. During ELMs the electron temperatures derived from the ball-pen probe and fast swept single probes agreed. (C) 2010 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码：847 / 853
页数：7
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