@article{oai:nifs-repository.repo.nii.ac.jp:00010809,
 author = {Bando, T. and OHDACHI,  Satoshi and SUZUKI,  Yasuhiro and SAKAMOTO,  Ryuichi and NARUSHIMA,  Yoshiro and TAKEMURA,  Yuki and TAKEMURA, Yuuki and WATANABE,  Kiyomasa and SAKAKIBARA,  Satoru and Du, X.D. and MOTOJIMA,  Gen and TANAKA,  Kenji and MORISAKI,  Tomohiko and LHD, Experiment Group},
 issue = {1},
 journal = {Physics of Plasmas},
 month = {Jan},
 note = {Two types of oscillation phenomena are found just after hydrogen ice pellet injections in the Large Helical Device (LHD). Oscillation phenomena appear when the deposition profile of a hydrogen ice pellet is localized around the rotational transform ι = 1 rational surface. At first, damping oscillations (type-I) appear only in the soft X-ray (SX) emission. They are followed by the second type of oscillations (type-II) where the magnetic fluctuations and density fluctuations synchronized to the SX fluctuations are observed. Both oscillations have poloidal/toroidal mode number, m/n = 1/1. Since the type-II oscillations appear when the local pressure is large and/or the local magnetic Reynold's number is small, it is reasonable that type-II oscillations are caused by the resistive interchange modes. Because both types of oscillations appear simultaneously at slightly different locations and with slightly different frequencies, it is certain that type-I oscillations are different from type-II oscillations, which we believe is the MHD instability. It is possible that type-I oscillations are caused by the asymmetric concentration of the impurities. The type-I oscillations are similar to the impurity snake phenomena observed in tokamaks though type-I oscillations survive only several tens of milliseconds in LHD.},
 title = {Simultaneous excitation of the snake-like oscillations and the m/n = 1/1 resistive interchange modes around the iota = 1 rational surface just after hydrogen pellet injections in LHD plasmas},
 volume = {25},
 year = {2018}
}