Identification of the primary processes that lead to the drop in divertor target ion current at detachment in TCV. Issue 6 (14th February 2018)

• Record Type: Journal Article
• Authors: Fil, A.; Dudson, B.; Lipschultz, B.; Moulton, D.; Verhaegh, K.; Fevrier, O.; Wensing, M.
• Other Names: Marandet Y. guestEditor.; Ciraolo G. guestEditor.; Rosato J. guestEditor.; Serre E. guestEditor.
• Is Part Of: Contributions to plasma physics. Volume 58:Issue 6/7/8(2018)
• Page Start: 746
• Page End: 750
• Publication Date: 2018-02-14
• Subjects: detachment -- SOL -- TCV -- tokamak; Plasma (Ionized gases) -- Periodicals; Electronic journals; 530.44
• DOI: 10.1002/ctpp.201700171
• Languages: English
• ISSNs: 0863-1042

Abstract

Abstract : 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.