Plasma ion heating by cryogenic pellet injection. (11th January 2019)

• Record Type: Journal Article
• Authors: Aleynikov, Pavel; Breizman, Boris N.; Helander, Per; Turkin, Yuriy
• Is Part Of: Journal of plasma physics. Volume 85:Number 1(2019)
• Publication Date: 2019-01-11
• Subjects: fusion plasma, -- plasma heating; Plasma (Ionized gases) -- Periodicals; 530.4405
• DOI: 10.1017/S0022377818001332
• Languages: English
• ISSNs: 0022-3778

Abstract

Abstract : 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.