Divertor and midplane materials evaluation system in DIII-D
نویسندگان
چکیده
منابع مشابه
An evaluation of kinetic eects in the DIII-D divertor
Under certain conditions, high temperature electrons diusing across the separatrix near the midplane can propagate to the divertor without collision and produce a high energy tail in the electron distribution function near the separatrix. We evaluate a kinetic criterion along the ®eld using measurements from divertor Thomson scattering and compare temperature measurements from target plate Lan...
متن کاملFlow reversal, convection, and modeling in the DIII-D divertor
Measurements of the parallel Mach number of background plasma in the DIII-D tokamak divertor @M. A. Mahdavi et al. in Proceedings, 16th International Conference, Montreal, 1996 ~International Atomic Energy Agency, Vienna, 1997! Vol. I, p. 397# were performed using a fast scanning Mach probe. The parallel particle flow shows evidence of complex behavior such as reverse flow, i.e., flow away from...
متن کاملDivertor Plasma Physics Experiments on the Diii–d Tokamak
DIVERTOR PLASMA PHYSICS EXPERIMENTS ON THE DIII–D TOKAMAK. In this paper we present an overview of the results and conclusions of our most recent divertor physics and development work. Using an array of new divertor diagnostics we have measured the plasma parameters over the entire divertor volume and gained new insights into several divertor physics issues. We present direct experimental evide...
متن کاملImpurity Feedback Control for Enhanced Divertor and Edge Radiation in Diii–d Discharges
Radiated power fractions above 90% have been achieved in DIII–D using impurity feedback control. Heat flux reductions up to a factor of 6 and confinement enhancements of 1.6 × ITER-89P L–mode scaling have been obtained with a radiated power fraction above 70%. When the outer separatrix strike point was positioned for pumping with the DIII–D cryopump, ELMing H–mode (Type III ELMs) was triggered ...
متن کاملAn experimental comparison of gross and net erosion of Mo in the DIII-D divertor
Experimental observation of net erosion of molybdenum being significantly reduced compared to gross erosion in the divertor of DIII-D is reported for well-controlled plasma conditions. For the first time, gross erosion rates were measured by both spectroscopic and non-spectroscopic methods. In one experiment a net erosion rate of 0.73 ± 0.03 nm/s was measured using ion beam analysis (IBA) of a ...
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ژورنال
عنوان ژورنال: Journal of Nuclear Materials
سال: 2007
ISSN: 0022-3115
DOI: 10.1016/j.jnucmat.2007.01.121