@article{oai:nifs-repository.repo.nii.ac.jp:00000310, author = {Mito, Toshiyuki and Maekawa, Ryuji and Yamada, Shuich and Nishimura, Arata and Takahata, Kazuya and Iwamoto, Akifumi and Imagawa, Shinsaku and Watanabe, Kiyomasa and Yanagi, Nagato and Tamura, Hitoshi and Baba, Tomosumi and Moriuchi, Sadatomo and Oba, Kouki and Sekiguch, Haruo and Ohtake, Isao and Satow, Takashi and Satoh, Sadao and Motojima, Osamu and the LHD Group , and LHD Group,}, issue = {Issue 2}, journal = {IEEE Transactions on Applied Superconductivity}, month = {Jun}, note = {The first cool-down test of the Large Helical Device (LHD) and the performance of the LHD cryogenic system during the first cycle operation are described. The first cool-down started on Feb. 23, 1998 and finished on Mar. 22. After the cool-down, the excitation tests of the SC coils up to 1.5 T and the first cycle operations for plasma physics experiments were conducted until May 18. The first cycle operation was successfully completed after the warm-up process to room temperature from May 19 to Jun. 15. The cooling characteristics of the LHD, such as temperature distribution during cool-down, heat loads under steady state condition, reliability during long-term operation, are reported}, title = {First Cool-Down Performance of the LHD}, volume = {Vol.9}, year = {1999} }