This title appears in the Scientific Report :
2013
Please use the identifier:
http://dx.doi.org/10.1016/j.jnucmat.2013.01.007 in citations.
Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET
Tungsten divertor erosion in all metal devices: Lessons from the ITER like wall of JET
Tungsten erosion in the outer divertor of the JET ITER like wall was quantified by spectroscopy. Effective sputtering yields of typically 10−4 were measured in L-mode at ∼30 eV attached divertor conditions and beryllium was identified as the main cause of sputtering. The signature of prompt redeposi...
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Personal Name(s): | van Rooij, G. J. (Corresponding author) |
---|---|
Coenen, J. W. / Aho-Mantila, L. / Brezinsek, S. / Clever, M. / Dux, R. / Groth, M. / Krieger, K. / Marsen, S. / Matthews, G. F. / Meigs, A. / Neu, R. / Potzel, S. / Pütterich, T. / Rapp, J. / Stamp, M. F. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Journal of nuclear materials, 438 (2013) Supplement, S. S42 - S47 |
Imprint: |
Amsterdam [u.a.]
Elsevier Science
2013
|
DOI: |
10.1016/j.jnucmat.2013.01.007 |
Conference: | Proceedings of the 20th International Conference on Plasma-Surface Interactions in Controlled Fusion Devices |
Document Type: |
Journal Article |
Research Program: |
Plasma-wall interactions |
Publikationsportal JuSER |
Tungsten erosion in the outer divertor of the JET ITER like wall was quantified by spectroscopy. Effective sputtering yields of typically 10−4 were measured in L-mode at ∼30 eV attached divertor conditions and beryllium was identified as the main cause of sputtering. The signature of prompt redeposition was observed in the analysis of WI 400.9 nm and WII 364 nm line ratios and indicative of >50% redeposition fractions. Inter- and intra-ELM sputtering were compared for an example of 10 Hz ELMs with 13 MW NBI heating, in which intra-ELM sputtering was found to dominate by a factor of 5. Nitrogen seeding initially increased the tungsten sputtering threefold due to higher extrinsic impurity levels and effectively reduced the tungsten sputtering when the divertor plasma temperature was decreased from the initial 25 eV down to 15 eV. |