@article{oai:nifs-repository.repo.nii.ac.jp:00010936,
 author = {SHOJI,  Mamoru and MASUZAKI,  Suguru and Kobayashi,  M. and Funaba,  H. and MORISAKI,  Tomohiko and Yamada,  H. and The LHD Experiment Group,},
 journal = {Journal of Nuclear Materials},
 month = {Jul},
 note = {Control of the peripheral plasma density is one of urgent tasks for improving the plasma performance in the Large Helical Device. Test modules with a baffle divertor structure have been installed in the inboard side of the torus for controlling the neutral density in the plasma periphery. Neutral hydrogen and helium transport in an original open divertor and the baffle divertor configurations have been monitored with filtered CCD cameras to observe the intensity profile of visible emission by neutral hydrogen (Hα) and helium (HeI). A detailed analysis using a three-dimensional neutral particle transport simulation code reasonably explains the dependence of the observed intensity profiles on the divertor and the magnetic configurations. It also predicts that the baffle divertor significantly reduces the emission of neutral hydrogen in the plasma periphery in the inboard side, and the compression of neutral helium density by the baffle divertor is comparable to that of hydrogen.},
 pages = {S559--S562},
 title = {Effect of a baffle divertor structure on neutral hydrogen and helium transport in the Large Helical Device},
 volume = {438},
 year = {2013}
}