@article{oai:nifs-repository.repo.nii.ac.jp:00002756, author = {"Oka, Y. and Takeiri, Y. and Tsumori, K. and Kaneko, O. and Osakabe, M. and Asano, E. and Kawamoto, T. and Akiyama, R."}, journal = {Annual Report of National Institute for Fusion Science}, month = {2016-03-14}, title = {Initial Test of 15 MW Negative-Ion-Based Neutral Beam Injection System for the Large Helical Device.(1)}, volume = {Annual Report Apr.1998 - Mar.1999}, year = {} }