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Temperature screening effect in two-ion-species Pfirsch-Schlüter transport

1977; IOP Publishing; Volume: 17; Issue: 4 Linguagem: Inglês

10.1088/0029-5515/17/4/013

1741-4326

K. T. Tsang, E.C. Crume,

Dust and Plasma Wave Phenomena

The particle and heat flux problems in the collisional or Pfirsch-Schlüter regime for a two-ion-species tokamak plasma are solved by using a kinetic approach with exact Fokker-Planck collision operators. These solutions are appropriate for analysing the behaviour of impurities in the low-temperature plasma edge region where impurities first enter the plasma from the outside. We find that low-charge states of low-mass impurities can be screened effectively from further penetration of the plasma.