Plasma ion heating by cryogenic pellet injection

The injection of cryogenic pellets into a magnetically confined plasma is shown to be accompanied by a considerable transfer of thermal energy from the electrons in the background plasma to the ions. The resulting ion heating can be significant, particularly in plasmas with disparate electron and io...

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Bibliographic Details
Published in:Journal of plasma physics 2019-02, Vol.85 (1), Article 905850105
Main Authors: Aleynikov, Pavel, Breizman, Boris N., Helander, Per, Turkin, Yuriy
Format: Article
Language:English
Subjects:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Cold
Electric fields
Energy
Energy balance
Estimates
Heating
Injection
Magnetic fields
Plasma
Plasma physics
Plasmas (physics)
Thermal energy
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Summary:The injection of cryogenic pellets into a magnetically confined plasma is shown to be accompanied by a considerable transfer of thermal energy from the electrons in the background plasma to the ions. The resulting ion heating can be significant, particularly in plasmas with disparate electron and ion temperatures, and can affect the energy balance of the plasma. In recent Wendelstein 7-X experiments, this mechanism can account for a substantial fraction of the ion heating power during pellet injection.
ISSN:0022-3778
1469-7807
DOI:10.1017/S0022377818001332