@article{oai:nifs-repository.repo.nii.ac.jp:00000113, author = {Yanagi, Nagato and Imagawa, Shinsaku and Mito, Toshiyuki and Gavrilin, Andrew V. and Hamaguchi, Shinji and Sekiguchi, Haruo and Chikaraishi, Hirotaka and Iwamoto, Akifumi and Nishimura, Arata and Nakamura, Yukio and Satow, Takashi and Motojima, Osamu}, issue = {Issue 1}, journal = {IEEE Transactions on Applied Superconductivity}, month = {Mar}, note = {Transient normal-transitions have been observed in the superconducting helical coils of LHD. Propagation of a normal-zone is analyzed with a numerical simulation code that deals with the magnetic diffusion process in a pure aluminum stabilizer. During excitation tests, a number of spike signals are observed in the balance voltage of the helical coils, which seem to be caused by mechanical disturbances. The spike signals are analyzed by applying pulse height analysis and the mechanical properties of the coil windings are investigated.}, title = {Analysis on the cryogenic stability and mechanical properties of the LHD helical coils}, volume = {Vol.12}, year = {2002} }