Abstract
In GAMMA 10/PDX, spatial distribution of the occurrence of molecular activated recombination (MAR) has been studied by measuring two dimensional distributions of Hα and Hβ line intensities of the divertor simulation plasma. The V-shaped target in the D-module which is installed in the west end region was exposed to the end loss plasma, and additional hydrogen gas was injected in the D-module. The electron temperature near the corner of the V-shaped target decreased to ∼2 eV with increase in the neutral gas pressure in the D-module and the density roll over was observed, indicating the plasma was detached. The two dimensional distributions of the intensity ratio of Hα and Hβ line intensities indicates that MAR was enhanced with increase in the neutral gas pressure and the region of the MAR occurrence spread and moved to the upstream side.
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