Identification of the primary processes that lead to the drop in divertor target ion current at detachment in TCV

Using SOLPS-ITER, we model a TCV conventional divertor discharge density ramp to understand the role of various processes in the loss of target ion current. We find that recombination is not a strong contributor to the rollover of the target ion current at detachment. In contrast, the divertor ion source appears to play a central role in magnitude (the source of most of the ion target current) and time, apparently dropping during the density ramps as a result of a drop in power available for ionization.


Published in:
Contributions To Plasma Physics, 58, 6-8, 746-750
Presented at:
16th International Workshop on Plasma Edge Theory in Fusion Devices (PET), Marseille, FRANCE, Sep 27-29, 2017
Year:
Jul 01 2018
ISSN:
0863-1042
1521-3986
Keywords:
Laboratories:




 Record created 2018-12-13, last modified 2019-06-19


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