@misc{oai:repo.qst.go.jp:00069087,
 author = {Houjou, Satoru and 北條 悟},
 month = {Aug},
 note = {Abstract: 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 in 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 a test, almost 300 eA 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 and applying microwave power is 100 ms, respectively.
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 a case of continuous gas provided in 3.3 second of repetition in HIMAC., 第12回イオン源国際会議},
 title = {Application of compact ECR ion source},
 year = {2007}
}