TY  - JOUR
AU  - Vuoriheimo, Tomi
AU  - Hakola, Antti
AU  - Likonen, Jari
AU  - Brezinsek, Sebastijan
AU  - Dittmar, Timo
AU  - Mayer, Matej
AU  - Prakash Dhard, Chandra
AU  - Naujoks, Dirk
AU  - Tuomisto, Filip
TI  - Deposition of 13C tracer and impurity elements on the divertor of Wendelstein 7-X
JO  - Physica scripta
VL  - 96
IS  - 12
SN  - 0031-8949
CY  - Stockholm
PB  - The Royal Swedish Academy of Sciences
M1  - FZJ-2022-04014
SP  - 124023 -
PY  - 2021
AB  - Carbon impurity transport and deposition were investigated in the Wendelstein 7-X stellarator by injecting isotopically labelled methane (13CH4) into the edge plasma during the last plasma operations of its Operational Phase (OP) 1.2B experimental campaign. 13C deposition was measured by secondary ion mass spectrometry (SIMS) on three upper divertor tiles located on the opposite side of the vessel to the13CH4 inlet. The highest 13C inventories were found as stripe-like patterns on both sides of the different strike lines. These high deposition areas were also analysed for their impurity contents and the depth profiles of the main elements in the layers. Layered deposition of different impurity elements such as Cr, Ni, Mo and B was found to reflect various events such as high metallic impurities during the OP1.2A and three boronizations carried out during OP1.2B.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000695704300001
DO  - DOI:10.1088/1402-4896/ac2381
UR  - https://juser.fz-juelich.de/record/910641
ER  -