@article{b472e296feb74324a18f8a68a3bbc7ca,
title = "Study of neutral hydrogen transport in LHD core plasmas based on high dynamic-range Balmer-α spectroscopy",
abstract = "The radial distributions of the neutral hydrogen atom density and pressure in the large helical device (LHD) and their electron density (ne) dependence were studied. The atom density distribution was determined from a detailed analysis of the intensity-calibrated Balmer-α line profile while the pressure distribution was obtained with a simple one-dimensional analytical model. We determined for the first time the atom density at the centre of a fusion-oriented plasma, which is more than three orders smaller than that at the edge. On the contrary, the atom pressure changes only by a factor of 10 from the edge to core regions. Both the atom density and pressure in the core region have negative ne dependence. The smaller drop of the atom pressure profile and the ne dependence of the atom density were discussed based on the diffusion theory.",
keywords = "Doppler effect, particle source, recycling",
author = "K. Fujii and M. Goto and S. Morita",
note = "Publisher Copyright: {\textcopyright} 2015 IAEA.",
year = "2015",
month = jun,
day = "1",
doi = "10.1088/0029-5515/55/6/063029",
language = "English",
volume = "55",
journal = "Nuclear Fusion",
issn = "0029-5515",
publisher = "IOP Publishing",
number = "6",
}