Plasma and Fusion Research
Volume 14, 2401156 (2019)
Regular Articles
- Plasma Research Center, University of Tsukuba, Tsukuba 305-8577, Japan
Abstract
Plasma parameters in the upstream and downstream regions in the divertor simulation experimental module (D-module) of the tandem mirror plasma device GAMMA 10/PDX were conducted using Langmuir probes. The detached plasma was produced using hydrogen puffing. In the upstream region, the electron temperature decreased from 30 to 7 eV, and the electron density increased. On the other hand, rollover of ne at the V-shaped corner was observed in the downstream region. Increasing Hα/Hβ at the corner of the V-shaped target was attributed to the molecular activated recombination processes. Hα/Hβ in the downstream region was different from that in the upstream region. Therefore, the ionization front appeared in the upstream region of the D-module.
Keywords
divertor, detached plasma, molecular activated recombination, GAMMA 10/PDX
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