TY - JOUR
T1 - Research and development activities on negative ion sources
AU - Tsumori, K.
AU - Takeiri, Y.
AU - Kaneko, O.
AU - Osakabe, M.
AU - Ando, A.
AU - Ikeda, K.
AU - Nagaoka, K.
AU - Nakano, H.
AU - Asano, E.
AU - Shibuya, M.
AU - Sato, M.
AU - Kondo, T.
AU - Komada, M.
PY - 2010
Y1 - 2010
N2 - The research and development (R&D) activity on the negative ion sources at the National Institute for Fusion Science is described. During the R&D period from 1989 to 1998, intensive experimental investigations were carried out at a test stand with three sizes of ion source, 1/6, 1/3, and full size. Although comprehensive research had been carried out, there remained some problems on the Large Helical Device (LHD) beamlines. To resolve those problems, the ion sources and beamlines have been improved in several successive steps since the beam injection experiment of LHD started. Over the past decade, the injection energy, power, and reliability have been increased; the maximum energy now exceeds the 180-keV design value and the maximum injected powers reach 6.8 and 5.5 MW from beamlines 1 and 2, respectively.
AB - The research and development (R&D) activity on the negative ion sources at the National Institute for Fusion Science is described. During the R&D period from 1989 to 1998, intensive experimental investigations were carried out at a test stand with three sizes of ion source, 1/6, 1/3, and full size. Although comprehensive research had been carried out, there remained some problems on the Large Helical Device (LHD) beamlines. To resolve those problems, the ion sources and beamlines have been improved in several successive steps since the beam injection experiment of LHD started. Over the past decade, the injection energy, power, and reliability have been increased; the maximum energy now exceeds the 180-keV design value and the maximum injected powers reach 6.8 and 5.5 MW from beamlines 1 and 2, respectively.
KW - Hydrogen
KW - LHD
KW - Negative ion source
KW - Neutral beam injection
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U2 - 10.13182/FST10-A10835
DO - 10.13182/FST10-A10835
M3 - Article
AN - SCOPUS:77956678998
SN - 1536-1055
VL - 58
SP - 489
EP - 496
JO - Fusion Science and Technology
JF - Fusion Science and Technology
IS - 1
ER -