Gierse, N., Brezinsek, S., Giesen, T. F., Huber, A., Laengner, M., Leyte-Gonzales, R., Marot, L., Meyer, E., Moeller, S., Naiim-Habib, M., Philipps, V., Pospieszczyk, A., Schweer, B., Sergienko, G., Zlobinski, M. and Samm, U. (2011). Characterization of hydrocarbon and mixed layers in TEXTOR by laser induced ablation spectroscopy. Phys. Scr., T145. BRISTOL: IOP PUBLISHING LTD. ISSN 1402-4896

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Abstract

Laser-based methods are investigated for the development of an in situ diagnostic for spatially and temporally resolved characterization of the first wall in fusion devices. Here we report on the first systematic laser-induced ablation spectroscopy (LIAS) measurements carried out on various surface layers in the TEXTOR tokamak. These materials include a-C: D, mixed W/C/Al/D-2, Oerlikon Balzers 'Balinit' diamond-like carbon layers and EK98 fine-grain graphite. In LIAS, the bulk or deposited material is evaporated during the plasma discharge by intense laser radiation. The light emitted by particles entering the edge of the ionizing tokamak plasma is then observed by optical spectroscopy. In the measurements taken, it was found that the studied layers can be identified by their characteristic line emission. A good correlation between the observed line intensity and layer thickness is found. The observed plumes show target material dependence. To analyze layers formed during tokamak operation, further investigation of the ablation process and reference materials for cross calibration is required.

Item Type: Journal Article
Creators:
CreatorsEmailORCIDORCID Put Code
Gierse, N.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Brezinsek, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Giesen, T. F.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Huber, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Laengner, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Leyte-Gonzales, R.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Marot, L.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Meyer, E.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Moeller, S.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Naiim-Habib, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Philipps, V.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Pospieszczyk, A.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schweer, B.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Sergienko, G.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Zlobinski, M.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Samm, U.UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
URN: urn:nbn:de:hbz:38-484195
DOI: 10.1088/0031-8949/2011/T145/014026
Journal or Publication Title: Phys. Scr.
Volume: T145
Date: 2011
Publisher: IOP PUBLISHING LTD
Place of Publication: BRISTOL
ISSN: 1402-4896
Language: English
Faculty: Unspecified
Divisions: Unspecified
Subjects: no entry
Uncontrolled Keywords:
KeywordsLanguage
Physics, MultidisciplinaryMultiple languages
URI: http://kups.ub.uni-koeln.de/id/eprint/48419

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