@article{oai:nifs-repository.repo.nii.ac.jp:00011287,
 author = {OKAMOTO,  Atsushi and YOSHIMURA,  Shinji and TERASAKA,  Kenichiro and TANAKA, Masayoshi Y.},
 journal = {Plasma and Fusion Research},
 month = {Dec},
 note = {0000-0003-1784-9732, A high dispersion and high time-resolution spectrometer equipped with two slits in output ports is developed to observe variation of Doppler broadening in the high-temperature bubbles [K. Terasaka, et. al., Phys. Plasmas 25, 052113 (2018)]. Reduction of Doppler broadening in a line spectrum of helium ion is experimentally observed when the bubbles emerge in the viewing chord of spectrometer. The results suggest possibilities of ion temperature reduction during the high-temperature bubbles.},
 title = {Variation of Doppler Broadening in High-Temperature Bubbles Created in an ECR Plasma},
 volume = {14},
 year = {2019}
}