@inproceedings{oai:nifs-repository.repo.nii.ac.jp:00011232, author = {PETERSON, Byron and PETERSON, Byron J. and MUKAI, Kiyofumi and PANDYA, Shwetang N and SANO, Ryuichi and KOBAYASHI, Masahiro and MASUZAKI, Suguru and MORISAKI, Tomohiko and MORITA, Shigeru and GOTO, Motoshi and MIYAZAWA, Junichi and MIYAZAWA, Jun-ichi and TANAKA, Hirohiko and AKIYAMA, Tsuyoshi and MOTOJIMA, Gen and OHNO, Noriyasu and the, LHD Experiment Group}, month = {2022-05-24}, note = {0000-0002-4446-4603, In LHD, several methods of detachment have been attempted, including impurity gas puffing [1], and the application of an m/n=1/1 magnetic perturbation [2]. LHD is equipped with an imaging bolometer (IRVB) [3] that views the plasma from an upper port. Two scenarios are shown and compared, Ne puffing and N2 puffing. In the case of Ne puffing, radiation becomes more intense near the helical divertor X-point as the radiation increases. In the case of N2 puffing, a double stripe pattern evolves around the upper helical divertor X-point, which appears to be localized near the gas puff inlet. In addition, probe data also indicates that the drop in divertor flux with N2 is localized, while uniform with Ne.}, title = {Imaging of radiation during impurity gas puffing in LHD}, year = {} }