This title appears in the Scientific Report :
2001
Please use the identifier:
http://dx.doi.org/10.1023/A:1012842000311 in citations.
Numerical modelling of limiter biasing experiments on TEXTOR-94
Numerical modelling of limiter biasing experiments on TEXTOR-94
The 2D multifluid code TECXY has been used to model the experimental biasing of the toroidal belt limiter ALT-II on the tokamak TEXTOR-94 with respect to the first wall. It is well known that the edge flow pattern can be influenced by the poloidal electric drifts from imposing radial electric fields...
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Personal Name(s): | Gerhauser, H. |
---|---|
Zagorski, R. / Mank, G. / Loarer, T. / Gunn, J. / Boucher, C. | |
Contributing Institute: |
Institutsbereich I; IPP-1 Institutsbereich II; IPP-2 |
Published in: | Czechoslovak journal of physics, 51 (2001) S. 1033 - 1046 |
Imprint: |
Praha
Academy of Sciences of the Czech Republic
2001
|
Physical Description: |
1033 - 1046 |
DOI: |
10.1023/A:1012842000311 |
Document Type: |
Journal Article |
Research Program: |
Apparative Methoden zum Teilchenkreislauf und zur Leistungsauskopplung Teilchen- und Energietransport in der Plasmarandschicht |
Series Title: |
Czechoslovak Journal of Physics
51 |
Subject (ZB): | |
Publikationsportal JuSER |
The 2D multifluid code TECXY has been used to model the experimental biasing of the toroidal belt limiter ALT-II on the tokamak TEXTOR-94 with respect to the first wall. It is well known that the edge flow pattern can be influenced by the poloidal electric drifts from imposing radial electric fields. The modelling with TECXY introduces imprinted bias currents in the scrape-off layer for the case of negative (limiter) biasing, and imprinted bias potentials for the case of positive biasing. This allows to simulate sufficiently well the experimental current-voltage characteristics for either biasing and also reproduces the essential features and trends of the observed plasma profiles in the SOL. A moderate negative biasing is found to be optimal for the exhaust efficiency of the pump limiter. |