This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2009.01.252 in citations.
Ion cyclotron wall conditioning in reactive gases on TEXTOR
Ion cyclotron wall conditioning in reactive gases on TEXTOR
The influence of working gas on the performance of Ion Cyclotron Wall Conditioning (ICWC) has been studied in the TEXTOR tokamak. Several reactive gases (H-2, D-2, O-2, N-2, NH3) and their mixtures with He were tried and primary results about their efficiency to clean the wall from impurities and to...
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Personal Name(s): | Sergienko, G. |
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Lyssoivan, A. / Philipps, V. / Kreter, A. / Schulz, C. / Huber, A. / Esser, H. G. / Hu, J.S. / Freisinger, M. / Reimer, H. / Samm, U. | |
Contributing Institute: |
Plasmaphysik; IEF-4 JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of nuclear materials, 390-391 (2009) |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2009
|
DOI: |
10.1016/j.jnucmat.2009.01.252 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Journal of Nuclear Materials
390-391 |
Subject (ZB): | |
Publikationsportal JuSER |
The influence of working gas on the performance of Ion Cyclotron Wall Conditioning (ICWC) has been studied in the TEXTOR tokamak. Several reactive gases (H-2, D-2, O-2, N-2, NH3) and their mixtures with He were tried and primary results about their efficiency to clean the wall from impurities and to release the retained fuel have been obtained. The experiments have demonstrated in general that low temperature plasmas produced in these gas mixtures by a conventional ion cyclotron heating system are suitable for wall cleaning. For comparison of the cleaning efficiency of different gas mixtures (except O-2), the TEXTOR wall was pre-loaded with Ar and D in a glow discharge. The release of At atoms due to ICWC has shown a sequential reduction in series of ICWC plasma pulses. This reduction was used as a criterion for the cleaning efficiency. For the fist time ammonia has been tested for the wall conditioning in a tokamak and demonstrated Ar and D cleaning efficiencies similar to the He/H-2 mixtures. (C) 2009 Elsevier B.V. All rights reserved. |