@article{7b596b419fb24e88b38db215e56617e5,
title = "Abrupt onset of tongue deformation and phase space response of ions in magnetically-confined plasmas",
abstract = "An abrupt onset of the new tongue-shaped deformation of magnetic surface in magnetized plasmas, which was conjectured in since the 1960s but has not been observed, is experimentally identified just before an abrupt onset of a large-scale collapse event. Two novel properties of the event are identified. First, the transition of symmetry of perturbation (rather than a growth of linearly unstable MHD modes) was found to be a key for the onset of abrupt collapse, i.e., the transition of symmetry gives a new route to the collapse from stable state. Second, as a phase-space response of ions, the distortion from Maxwell-Boltzmann distribution of epithermal ions was observed for the first time.",
author = "K. Ida and T. Kobayashi and K. Itoh and M. Yoshinuma and T. Tokuzawa and T. Akiyama and C. Moon and H. Tsuchiya and Inagaki Shigeru and Sanae Itoh",
note = "Funding Information: The author would like to thank Dr. K.Ogawa (NIFS) for the development of magnetic probe data acquisition system, Dr. Gunsu Yun (Pohang University of Science and Technology) for the installation and the development of RF radiation probe in LHD and Dr. R. O. Dendy (Culham Laboratory, University of Warwick) for the discussion on the interpretation of the RF radiation probe signal. This work is partly supported by Grant-in-Aid for Scientific Research (No. 15H02155, 15H02336, and 16K13923) of JSPS Japan. This work is also partly supported by NIFS10ULHH021 and collaboration program of NIFS and RIAM Kyushu University (NIFS13KOCT001) and Asada Eiichi Research Foundation. Publisher Copyright: {\textcopyright} The Author(s) 2016.",
year = "2016",
month = oct,
day = "31",
doi = "10.1038/srep36217",
language = "English",
volume = "6",
journal = "Scientific Reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}