@article{oai:repo.qst.go.jp:00045286,
 author = {Houjou, Satoru and Honma, Toshihiro and Muramatsu, Masayuki and Sakamoto, Yukio and Sugiura, Akinori and 北條 悟 and 本間 壽廣 and 村松 正幸 and 坂本 幸雄 and 杉浦 彰則},
 issue = {2},
 journal = {Review of Scientific Instruments},
 month = {Jan},
 note = {A gas-pulsing system for an electron cyclotron resonance ion source with all permanent magnets (Kei2 source) at NIRS has been developed and tested. The system consists of a small vessel (30 ml) to reserve CH4 gas and two fast solenoid valves that are installed at both sides of the vessel. They are connected to each other and to the Kei2 source by using a stainless-steel pipe (4 mm inner diameter), where the length of the pipe from the valve to the source is 60 cm and the conductance is 1.2 l / s. From the results of the test, almost 300 e microA for a pulsed 12C4+ beam was obtained at a Faraday cup in an extraction-beam channel with a pressure range of 4000 Pa in the vessel. At this time, the valve has an open time of 10 ms and the delay time between the valve open time and the application of microwave power is 100 ms. In experiments, the conversion efficiency for input CH4 molecules to the quantity of extracted 12C4+ ions in one beam pulse was found to be around 3% and the ratio of the total amount of the gas requirement was only 10% compared with the case of continuous gas provided in 3.3 s of repetition in HIMAC.},
 pages = {02A306-1--02A306-3},
 title = {Development of gas pulsing system for electron cyclotron resonance ion source},
 volume = {79},
 year = {2008}
}