Efficacy of photon cleaning of JET divertor tiles
| Autor: | Marek Rubel, N. Bekris, K. J. Gibson, M. J. Forrest, J.P. Coad, Jari Likonen, W. Parsons, Anna Widdowson, G. F. Counsell, T. Renvall, D.E. Hole |
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| Jazyk: | angličtina |
| Rok vydání: | 2007 |
| Předmět: |
Nuclear and High Energy Physics
Light nucleus Photon Nuclear physics ITER divertor General Materials Science Composite material plasma Jet (fluid) Chemistry tritium Divertor Fusion power surface analysis Pulse (physics) fusion energy Nuclear Energy and Engineering Deuterium JET visual_art visual_art.visual_art_medium desorption Tile deuterium inventory |
| Zdroj: | Widdowson, A, Coad, J P, Bekris, N, Counsell, G, Forrest, M J, Gibson, K J, Hole, D, Jari, L, Parsons, W, Renvall, T & Rubel, M 2007, ' Efficacy of photon cleaning of JET divertor tiles ', Journal of Nuclear Materials, vol. 363-365, pp. 341-345 . https://doi.org/10.1016/j.jnucmat.2007.01.030 |
| ISSN: | 1873-4820 0022-3115 |
| DOI: | 10.1016/j.jnucmat.2007.01.030 |
| Popis: | Photon cleaning by means of a flash-lamp was used for in-situ detritiation of the inner wall tiles of the JET divertor in May 2004. Additional trials were also performed ex-situ in October 2004 on divertor base tiles. Early work confirmed that for pulse energies between 150 J and 300 J some deposited material was removed. To increase the amount of material removed during photon cleaning, further experiments with higher pulse energies (500 J) were performed and are reported here. Analysis of cross sections confirmed a removal rate of 0.04 μm/pulse, removing ∼80 μm from 200 μm thick deposits over a treatment area of 15 × 10 −4 m 2 . During the photon cleaning tests at least 12% of the tritium inventory for the tile was removed. It was also shown that deuterium was desorbed from a depth ∼7 μm beyond the depth of material removed. |
| Databáze: | OpenAIRE |
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