Observation of the molecular assisted recombination in a hydrogen plasma

Details Observation of the molecular assisted recombination in a hydrogen plasma Observation of the molecular assisted recombination in a hydrogen plasma

2004-10-20

arxiv.org/abs/physics/0410174v1

Physics

Plasma Physics

12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)

Scientific paper

We have presented the experimental observation of the spatial structure of Molecular Assisted Recombination (MAR) including both dissociative recombination and mutual neutralization channels in the detached hydrogen plasma in the linear divertor plasma simulator, TPD-SheetIV. It is shown from the results of mass-analysis (H2+, H3+) that dissociative recombination is dominant in the center of the plasma over a range of low gas pressures. At the same time, it is observed that the mutual neutralization in MAR via H- ion formation, which is produced by dissociative electron attachment to H2(v), occurs in the periphery of the plasma where cold electrons (~1 eV) are found.

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