@article{oai:nifs-repository.repo.nii.ac.jp:00006863, author = {Matsumoto, Y. and Nishiura, M. and Yamaoka, H. and Shinto, K. and Sasao, M. and Wada, M.}, journal = {Annual Report of National Institute for Fusion Science}, month = {2016-03-15}, title = {H? Extraction Study for a Practical Beam Extraction System in an H? Ion Source}, volume = {Annual Report Apr.2011 - Mar.2012}, year = {} }