D Jablonski

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The achievement of large volumetric power losses (dissipation) in the Alcator C-Mod divertor region is demonstrated in two operational modes: radiative divertor and detached divertor. During radiative divertor operation, the fraction of SOL power lost by radiation is P R/PSOL0.8 with single null plasmas, n e < 2x10 20 m-3 and I < 1 MA. These plasmas(More)
The divertor of the Alcator C-Mod tokamak routinely radiates a large fraction of the power entering the scrape-off layer. This dissipative divertor operation occurs whether the divertor is detached or not, and large volumetric radiative emissivities, up to 60 MW-m-3 in ICRF-heated discharges, have been measured using bolometer arrays. An analysis of both(More)
Alcator C-Mod is a high-field tokamak with which experiments were initiated in April 1993. The divertor and the first-wall have plasma-facing surfaces of molybdenum. The divertor has a configuration which is closed in comparison to other, currently operating tokamaks. The combination of divertor geometry and high field (density) make Alcator C-Mod an ideal(More)
Alcator C-Mod has demonstrated H-mode confinement that exceeds recent empirical H-mode scalings by a factor of 1.5. A new type of ELM behavior has been observed that avoids high instantaneous heat outflux. The compact, high-field plasmas obtained have enabled divertor studies to be performed at parallel power fluxes close to those predicted for ITER.(More)
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