Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Rapid Communications
Observation of Direct Ion Heating in Double-Pulsing CHI in Helicity Injected Spherical Torus Plasmas
Takafumi HANAOHidetoshi HIRONOTakahiro HYOBUKengo ITOKeisuke MATSUMOTOTakashi NAKAYAMAYusuke KIKUCHINaoyuki FUKUMOTOMasayoshi NAGATA
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2013 Volume 8 Pages 1202104

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Abstract

Anomalous ion heating has been observed for the first time during flux/current amplification by double-pulsing coaxial helicity injection (CHI) in the helicity injected spherical torus (HIST) device. Doppler ion temperature increases significantly near the separatrix on the inboard side during the second CHI pulse, whereas electron temperature remains constant. The experimental results indicate that selective ion heating may be associated with viscous damping of poloidal flows driven by the CHI pulse.

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© 2013 by The Japan Society of Plasma Science and Nuclear Fusion Research
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