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

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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 due to a drop in power available for ionization.
Original languageEnglish
JournalContributions to plasma physics
Issue number6-8
Early online date14 Feb 2018
Publication statusPublished - 2018

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