@article{oai:repo.qst.go.jp:00083798,
 author = {Yuji, Shimabukuro and Junichi, Hiratsuka and Masahiro, Ichikawa and Masamichi, Murayama and mae quinones Saquilayan, Glynnis and Masashi, Kisaki and Atsushi, Kojima and Hiroyuki, Tobari and Mieko, Kashiwagi and Yuji, Shimabukuro and Junichi, Hiratsuka and Masahiro, Ichikawa and Masamichi, Murayama and mae quinones Saquilayan, Glynnis and Masashi, Kisaki and Atsushi, Kojima and Hiroyuki, Tobari and Mieko, Kashiwagi},
 issue = {1},
 journal = {Journal of Physics: Conference Series},
 month = {Apr},
 note = {A protection system of ion source components from local abnormal discharge has been developed with ITER-class filament-driven negative ion source for high power and stable long-term operation. Protection from unpredictable discharge is a common issue for filament and RF-driven ion sources. To understand how fast should be cut off the discharge, threshold energy not to cause critical damage on the filament was investigated. The experimental exploration concluded that the energy less than 1.87 J or fast cut-off faster than 343 μs is the threshold for the robust protection of the filaments. A developed system successfully detected and cut off the discharge at 100 μs under noisy environments with the high current power supply. Moreover, the detection system is remotely adjustable. Such versatile protection system can contribute to any abnormal discharges in high current system including various ion sources, gyrotron, and high voltage components.},
 pages = {012106-1--012106-5},
 title = {Suppression of damages on cathodes in the negative hydrogen ion source for the stable NBI system},
 volume = {2244},
 year = {2021}
}