| Title | Interpretation of recent power width measurements in JET MkIIGB ELMy h-modes |
| Publication Type | Journal Article |
| Year of Publication | 2002 |
| Authors | W. Fundamenski, S. Sipila, G.F Matthews, V. Riccardo, P. Andrew, T. Eich, L.C Ingesson, T. Kiviniemi, T. Kurki-Suonio, V. Philipps |
| Journal | Plasma Physics and Controlled Fusion |
| Volume | 44 |
| Number | 6 |
| Pagination | 761-793 |
| Date Published | Jun |
| Type of Article | Article |
| ISBN Number | 0741-3335 |
| Accession Number | ISI:000177105000012 |
| Keywords | EDGE, TOKAMAKS |
| Abstract | Results of a novel technique of measuring the deposited power profile based on thermocouples embedded in the divertor plates a-re presented and discussed. Power profiles were obtained for a series of 2.5 MA/2.4 T discharges involving a scan in the NBI heating power (4-18 MW, where PL-H similar to 5 MW) and a scan in D-2 fuelling rate ((0-3) X 10(22) s(-1)). In H-mode plasmas, a narrow feature was observed in the power profile, which scaled inversely with power entering the scrape-off-layer, lambda(q,nw) infinity p(SOL)(-0.4+/-0.1), while the base profile showed virtually no power dependence. At constant input power, the peak heat flux was strongly reduced by D2 puffing (from similar to20 to 4 MW m(-2)), with the narrow feature in the power profile effectively suppressed. Based on numerical analysis using a guiding-centre Monte-Carlo code ASCOT, coupled to a fluid-like plasma-neutral code package OSM2/EIRENE, the above results are interpreted as a consequence of inter-ELM ion orbit loss from the pedestal region. |
| URL | <Go to ISI>://000177105000012 |
| Division | Fusion Physics |
| Department | Instrumentation development |
| PID | 083b66f0c5e894c58fe7cdcc9088ddcb |
| Alternate Title | Plasma Phys. Control. Fusion |
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