(EX/P4-19) Radiation processes of impurities and hydrogen in detached divertor plasmas of JT-60U
T. Nakano1),
H. Kubo1),
N. Asakura1),
K. Shimizu1),
S. Konoshima1),
K. Fujimoto1),
H. Kawashima1),
S. Higashijima1)
1) Japan Atomic Energy Agency, Naka, Japan
Abstract. Volume recombination of C and e into C is observed for the first time in detached plasmas with MARFE. It is found that the recombination flux of
C4+ to
C3+ is comparable to the ionization flux of
C3+ to
C4+, and that the recombination zone is above an X-point and beneath the ionization zone. This result suggests that this volume recombination predominantly produces
C3+ ions, which contribute 60-80% to the total radiation power in the divertor plasma.
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