@article{oai:nifs-repository.repo.nii.ac.jp:00007074, author = {Mitarai, O. and Sakamoto, M. and Goto, M. and Morisaki, T. and Masuzaki, T. and Ashikawa, N. and Tanaka, K.}, month = {2016-03-15}, title = {Estimation of the Particle Confinement Time of the Helium Ash in LHD}, volume = {Annual Report Apr.2005 - Mar.2006}, year = {} }