Fusion Technology · 1995 · 13 citations · 4 references
Natural SciencesNuclear EngineeringPhysicsFusion EngineeringPlasma PhysicsReactor PhysicsDivertor EngineeringFusion PlasmasHigh-temperature PlasmasPlasma ConfinementPlasma SourcesTokamak EngineeringDivertor Heat ExhaustDivertor PhysicsParticle Exhaust EfficiencyPlasma Density ControlThroughputTokamak ConfinementTokamak PhysicsTokamak Plasmas
A particle exhaust scheme, employing a cryocon-densation pump in the outboard divertor region under a baffle, has been installed and operated in the DIII-D tokamak. The cryopump provides toroidally symmetric pumping at a rate of 30 000 to 40 000 ℓ/s for D2 in the pressure range of 1 to 4 mTorr. Pressures in the 2 to 3 mTorr range are routinely observed under the baffle. This translates to particle exhaust throughputs of ~100 Torr ℓ/s. The exhaust throughput could be controlled by selecting the position of the plasma strike region with respect to the opening to the baffle chamber. The pump has been used quite effectively for plasma density control.
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A Monte-Carlo model of neutral-particle transport in diverted plasmas
D. Heifetz, D.E. Post, M. Petravić et al. · Journal of Computational Physics · 1982 · 308 citations
Ionization Avalanches and Breakdown
Students Quarterly Journal · 1967 · 31 citations
Divertor neutral pressure enhancement with a baffle in DIII-D
C. C. Klepper, J. Hogan, D. N. Hill et al. · Nuclear Fusion · 1993 · 23 citations