This title appears in the Scientific Report :
2007
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2007.01.247 in citations.
In-situ diagnostic for monitoring of deuterium and tritium in re-deposited carbon layers by laser-induced desorption
In-situ diagnostic for monitoring of deuterium and tritium in re-deposited carbon layers by laser-induced desorption
Tritium retention in the plasma facing components and co-deposition in re-deposited layers is a key issue for ITER, since the operation of the machine will be restricted to a maximum inventory of tritium. Development of methods to detect in real time the amount of retained fuel in the in vessel comp...
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Personal Name(s): | Schweer, B. |
---|---|
Irrek, F. / Sergienko, G. / Philipps, V. / Samm, U. | |
Contributing Institute: |
Plasmaphysik; IEF-4 JARA-ENERGY; JARA-ENERGY |
Published in: | Journal of nuclear materials, 363-365 (2007) S. 1375 - 1379 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2007
|
Physical Description: |
1375 - 1379 |
DOI: |
10.1016/j.jnucmat.2007.01.247 |
Document Type: |
Journal Article |
Research Program: |
Fusion |
Series Title: |
Journal of Nuclear Materials
363-365 |
Subject (ZB): | |
Publikationsportal JuSER |
Tritium retention in the plasma facing components and co-deposition in re-deposited layers is a key issue for ITER, since the operation of the machine will be restricted to a maximum inventory of tritium. Development of methods to detect in real time the amount of retained fuel in the in vessel components is urgently required. A promising method for this is the pulsed laser induced desorption, by which the imbedded gas in such layers is released into the plasma where the injected atoms and molecules are excited and ionised and the characteristic line emission is detected spectroscopically. In this paper the release process is investigated in detail for amorphous hydrocarbon layers in a laboratory experiment, as a prerequisite for the later application and determination of conversion factors between line radiation and desorbed flux in TEXTOR plasmas. A Nd:YAG laser has been used with nearly constant output power leading to a smooth controllable increase of layer temperature, resulting in a complete desorption of D-2 and CD4 as well as preventing carbon sublimation. (c) 2007 Elsevier B.V. All rights reserved. |