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Dynamic erosion of plasma facing materials under ITER relevant thermal shock loads in the electron beam facility, JUDITH
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kuehnlein, Walter L. Linke, Jochen Sergienko, Gennady |
| Copyright Year | 2004 |
| Abstract | ITER relevant thermal shock loads have been perform ed in the electron beam facility, JUDITH. Dynamic erosion processes of fine grain graphite, c arbon fiber composite (CFC) and W-1%La 2O3 were observed by optical diagnostics. Collective small p rticle release which may correspond to erosion of graphite binder phase was observed at 2 GW/m 2 in graphite, whereas, distinguished particle relea se was observed at the same power density in CFC. The distinguished partic le release was concluded to be due to brittle destr uction of overheated PAN fibers which has lower thermal condu ctivity in vertical direction. Most particles relea sed from W-1%La2O3 were appeared to be droplets splashed from the mol ten surface. The contribution of brittle destruction in W-1%La 2O3 was not clearly observed in this particular therma l shock loads. Release of tungsten atoms and WO molecules was not observed by emission pectrometer even at high power density, 1.1 GW/m 2 which caused melting of the surfaces, however, rele as of LaO molecules was detected even at lower pow er density, 0.6 GW/m where and the surface did not show significant mod ification. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www-pub.iaea.org/MTCD/Meetings/PDFplus/fusion-20-preprints/FT_P1-20.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
