This paper describes a long-term operation of the 2.45-GHz microwave proton source at Peking University. The DC proton beam of 50–55 mA with energy of 35 keV has been run for 306 hours continuously. Total beam availability, defined as 35-keV beam-on time divided by elapsed time, is higher than 99%. Water cooling machine failures cause all the downtime, and no plasma generator failure or high voltage breakdown is observed. The longest uninterrupted run time is 122 hours.
Project supported by the National Basic Research Program of China (Grant No. 2014CB845502) and the National Natural Science Foundation of China (Grant No. 91126004).
Peng Shi-Xiang (彭士香), Zhang Ai-Lin (张艾霖), Ren Hai-Tao (任海涛), Zhang Tao (张滔), Xu Yuan (徐源), Zhang Jing-Feng (张景丰), Gong Jian-Hua (龚建华), Guo Zhi-Yu (郭之虞), Chen Jia-Er (陈佳洱) Continuous operation of 2.45-GHz microwave proton source for 306 hours with more than 50 mA DC beam 2015 Chin. Phys. B 24 075203
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A miniaturized 2.45 GHz ECR ion source at Peking University Jia-Mei Wen(温佳美), Shi-Xiang Peng(彭士香), Hai-Tao Ren(任海涛), Tao Zhang(张滔), Jing-Feng Zhang(张景丰), Wen-Bin Wu(武文斌), Jiang Sun(孙江), Zhi-Yu Guo(郭之虞), Jia-Er Chen(陈佳洱). Chin. Phys. B, 2018, 27(5): 055204.
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