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

0349708 - ÚFP 2011 RIV DE eng J - Journal Article
Müller, H. W. - Adámek, Jiří - Horáček, Jan - Ionita, C. - Mehlmann, F. - Rohde, V. - Schrittwieser, R.
Towards Fast Measurement of the Electron Temperature in the SOL of ASDEX Upgrade Using Swept Langmuir Probes.
Contributions to Plasma Physics. Roč. 50, č. 9 (2010), s. 847-853. ISSN 0863-1042. E-ISSN 1521-3986.
[International Workshop on Electric Probes in Magnetized Plasmas/8th./. Innsbruck, 21.09.2009-24.09.2009]
R&D Projects: GA AV ČR KJB100430901; GA ČR GA202/09/1467
Institutional research plan: CEZ:AV0Z20430508
Keywords : Tokamak * Langmuir probe * swept probe * ball-pen probe * fast temperature measurement * ELM
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.006, year: 2010
http://onlinelibrary.wiley.com/doi/10.1002/ctpp.201010144/pdf

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. Further comparisons are done in ELMy H-mode with combined ball-pen probe/floating potential measurements which can deliver electron temperatures.
Permanent Link: http://hdl.handle.net/11104/0189870