This title appears in the Scientific Report :
2006
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2005.09.020 in citations.
Velocity distribution of helium and neon atome released from graphite and tungsten limiters in TEXTOR
Velocity distribution of helium and neon atome released from graphite and tungsten limiters in TEXTOR
The release mechanisms of noble gases from plasma-facing components were observed spectroscopically in the TEX-TOR plasma boundary by determining the velocity distribution from Doppler broadening. For the first time, three different mechanisms for helium and neon release from graphite and tungsten l...
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Personal Name(s): | Lindner, P. |
---|---|
Brix, M. / Mertens, Ph. / Pospieszczyk, A. / Samm, U. / Schweer, B. / Unterberg, B. | |
Contributing Institute: |
Institut für Plasmaphysik; IPP JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of nuclear materials, 348 (2006) S. 283 - 293 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2006
|
Physical Description: |
283 - 293 |
DOI: |
10.1016/j.jnucmat.2005.09.020 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Journal of Nuclear Materials
348 |
Subject (ZB): | |
Publikationsportal JuSER |
The release mechanisms of noble gases from plasma-facing components were observed spectroscopically in the TEX-TOR plasma boundary by determining the velocity distribution from Doppler broadening. For the first time, three different mechanisms for helium and neon release from graphite and tungsten limiters could be distinguished quantitatively in a tokamak: thermal desorption, ion-induced desorption and particle reflection. Under the assumption that the thermal desorption follows a Maxwellian velocity distribution, the ion-induced desorption can be expressed by a Thompson velocity distribution. Calculating the particle reflection by the Monte-Carlo code TRIM, these processes could be separated in the measured velocity distribution. (c) 2005 Elsevier B.V. All rights reserved. |