000120020 001__ 120020
000120020 005__ 20181203021211.0
000120020 020__ $$a0022-3115
000120020 0247_ $$2doi$$a10.1016/S0022-3115(02)01538-6
000120020 022__ $$a0022-3115
000120020 02470 $$2DAR$$a3543
000120020 02470 $$2ISI$$a000182146700193
000120020 037__ $$aARTICLE
000120020 245__ $$aDeuterium to helium plasma-wall change-over experiments in the JET MkII-gas box divertor
000120020 260__ $$c2003
000120020 269__ $$a2003
000120020 336__ $$aJournal Articles
000120020 520__ $$aThe deuterium and helium dynamics in the plasma and subdivertor regions of JET are compared during a sequence of similar ohmic and ICRH pulses where 100% He gas is injected into the JET vacuum vessel, whose graphite walls were previously saturated with deuterium. After the first six He fueled change-over discharges, only He plasma operation was performed. Following this investigation, the situation is reversed and the change-over from an initially saturated He wall is investigated when only D-2 plasma fuelling is used. The He concentration is measured in the subdivertor with a species selective Penning gauge. Comparison of the time dependence of the divertor concentrations with those at the edge and strike point shows significant differences during the first six discharges. This difference along with a global He particle balance is used to assess the status of the wall saturation over the initial 6-7 He change-over discharges. (C) 2003 Elsevier Science B.V. All rights reserved.
000120020 6531_ $$aJET
000120020 700__ $$aHillis, D. L.
000120020 700__ $$aLoarer, T.
000120020 700__ $$aBucalossi, J.
000120020 700__ $$aPospieszczyk, A.
000120020 700__ $$aFundamenski, W.
000120020 700__ $$aMatthews, G.
000120020 700__ $$aMeigs, A.
000120020 700__ $$aMorgan, P.
000120020 700__ $$aPhillips, V.
000120020 700__ $$0240525$$aPitts, R.$$g106117
000120020 700__ $$aStamp, M.
000120020 700__ $$avon Hellermann, M.
000120020 773__ $$j313$$q1061-1065$$tJournal of Nuclear Materials
000120020 909C0 $$pCRPP
000120020 909C0 $$0252028$$pSPC
000120020 909CO $$ooai:infoscience.tind.io:120020$$pSB$$particle
000120020 937__ $$aCRPP-ARTICLE-2003-066
000120020 973__ $$aEPFL$$rREVIEWED$$sPUBLISHED
000120020 980__ $$aARTICLE