TY  - JOUR
AU  - Stamp, M.F.
AU  - Krieger, K.
AU  - Brezinsek, S.
TI  - Measurements of beryllium sputtering yields at JET
JO  - Journal of nuclear materials
VL  - 415
SN  - 0022-3115
CY  - Amsterdam [u.a.]
PB  - Elsevier Science
M1  - PreJuSER-10649
SP  - S170 - S173
PY  - 2011
N1  - Record converted from VDB: 12.11.2012
AB  - The lifetime of the beryllium first wall in ITER will depend on erosion and redeposition processes. The physical sputtering yields for beryllium (both deuterium on beryllium (Be) and Be on Be) are of crucial importance since they drive the erosion process. Literature values of experimental sputtering yields show an order of magnitude variation so predictive modelling of ITER wall lifetimes has large uncertainty. We have reviewed the old beryllium yield experiments on JET and used current beryllium atomic data to produce revised beryllium sputtering yields. These experimental measurements have been compared with a simple physical sputtering model based on TRIM.SP beryllium yield data. Fair agreement is seen for beryllium yields from a clean beryllium limiter. However the yield on a beryllium divertor tile (with C/Be codeposits) shows poor agreement at low electron temperatures indicating that the effect of the higher sputtering threshold for beryllium carbide is important. (C) 2011 EURATOM. Published by Elsevier B.V. All rights reserved.
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000298128100037
DO  - DOI:10.1016/j.jnucmat.2010.12.038
UR  - https://juser.fz-juelich.de/record/10649
ER  -