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

TY - JOUR

T1 - Identification of the primary processes that lead to the drop in divertor target ion current at detachment in TCV

AU - Fil, Alexandre Marie Denis

AU - Dudson, Benjamin Daniel

AU - Lipschultz, Bruce

AU - Moulton, D.

AU - Verhaegh, Kevin Henricus Annemarie

AU - Fevrier, O.

AU - Wensing, M.

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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.

U2 - 10.1002/ctpp.201700171

DO - 10.1002/ctpp.201700171

M3 - Article

SN - 0863-1042

VL - 58

JO - Contributions to plasma physics

JF - Contributions to plasma physics

IS - 6-8

ER -