Be wall sources and migration in L-mode discharges after Be evaporation in the JET tokamak
2009 (English)In: Journal of Nuclear Materials, ISSN 0022-3115, E-ISSN 1873-4820, Vol. 390-91, 110-114 p.Article in journal (Refereed) Published
First wall material erosion and migration after fresh Be evaporation in the JET tokamak were studied in a series of consecutive identical L-mode discharges. The evolution of Be and C wall and divertor sources towards steady state conditions after deposition of a finite amount of Be at the carbon first wall of JET by the beryllium evaporation procedure provides a data set for benchmarking impurity transport simulations. Furthermore the experiment serves as a reference case for comparison of Be erosion to that of the planned ITER-like wall experiment with mainly Be plasma facing components (PFCs) in the main chamber. The experimental results confirm the migration pattern obtained by campaign integrated accounting of impurity sources and sinks, which is characterised by the main chamber wall and outer divertor as erosion dominated zones and migration of eroded material predominantly to the inner divertor where the material is finally deposited at the target plates.
Place, publisher, year, edition, pages
2009. Vol. 390-91, 110-114 p.
Fusion, Plasma and Space Physics
IdentifiersURN: urn:nbn:se:kth:diva-30781DOI: 10.1016/j.jnucmat.2009.01.131ISI: 000267747300024OAI: oai:DiVA.org:kth-30781DiVA: diva2:404607
QC 201103172011-03-172011-03-042011-03-17Bibliographically approved