Premium
1D Fluid Regime of Plasma‐Neutral Interaction and Divertor Detachment
Author(s) -
Soboleva T. K.,
Krasheninnikov S. I.
Publication year - 1996
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150360241
Subject(s) - divertor , plasma , tokamak , atomic physics , energetic neutral atom , ionization , heat flux , hydrogen , physics , flux (metallurgy) , viscosity , materials science , ion , mechanics , thermodynamics , nuclear physics , heat transfer , quantum mechanics , metallurgy
We show that self consistent decrease of both plasma flux and neutral ionization in current tokamaks is only possible when neutrals can be treated in a short mean free path approximation. We investigate these fluid regimes of plasma‐neutral interaction with 1D fluid equations employing a neutral viscosity term to treat the neutral interaction with the divertor plate. We have found that plasma flux onto the target starts to decrease at a very low heat flux coming into the hydrogen recycling region, when the temperature near the target drops below 1 eV, which seems lower than observed in the experiments. We conclude that the neutral‐neutral collisions, 2D effects of plasma‐neutral interaction, and plasma recombination processes can play a very important role in divertor plasma detachment.