This title appears in the Scientific Report :
2003
Please use the identifier:
http://dx.doi.org/10.1016/S0022-3115(02)01409-5 in citations.
Simulation of hydrogen and hydrocarbon release from W-Ta and W-C twin test limiters in TEXTOR edge plasmas
Simulation of hydrogen and hydrocarbon release from W-Ta and W-C twin test limiters in TEXTOR edge plasmas
We have performed a Monte Carlo simulation of transport of atomic and molecular hydrogen and hydrocarbons released from W, Ta and C in edge plasmas of TEXTOR. The simulation derives thermal, dissociation and reflection components from the observed radial distribution of D-gamma line intensity around...
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Personal Name(s): | Ohya, K. |
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Hirai, T. / Tanabe, T. / Wada, M. / Ohgo, T. / Philipps, V. / Pospieszczyk, A. / Huber, A. / Sergienko, G. / Brezinsek, S. / Noda, N. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP Werkstoffstruktur und Eigenschaften; IWV-2 |
Published in: | Journal of nuclear materials, 313-316 (2003) S. 568 - 572 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2003
|
Physical Description: |
568 - 572 |
DOI: |
10.1016/S0022-3115(02)01409-5 |
Document Type: |
Journal Article |
Research Program: |
Kernfusion und Plasmaforschung |
Series Title: |
Journal of Nuclear Materials
313 -316 |
Subject (ZB): | |
Publikationsportal JuSER |
We have performed a Monte Carlo simulation of transport of atomic and molecular hydrogen and hydrocarbons released from W, Ta and C in edge plasmas of TEXTOR. The simulation derives thermal, dissociation and reflection components from the observed radial distribution of D-gamma line intensity around W Ta and W C twin test limiters. The D-gamma intensity in front of the limiter is dominated by thermal reemission of atomic hydrogen, whereas at the position well away from the limiter, dissociation of reemitted molecular hydrogen and reflection of incident hydrogen are important. The simulation allows us to estimate the surface temperature and material dependence of atomic and molecular fractions of hydrogen reemitted from the limiter. For Ta, hydrogen is reemitted as a mixture of atoms and molecules at 1200 K and the atomic fraction increases with increasing temperature (1400 K), whereas for W, the atomic release dominates the reemission process at the temperatures. (C) 2003 Elsevier Science B.V. All rights reserved. |