@article{oai:nifs-repository.repo.nii.ac.jp:00007167, author = {Miyazawa, J. and Sakamoto, R. and Ohdachi, S. and Yamada, H.}, journal = {Annual Report of National Institute for Fusion Science}, month = {2016-03-15}, title = {Necessary Conditions for Core Density Collapse in IDB Discharges}, volume = {Annual Report Apr.2006-Mar.2007}, year = {} }