  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.
