Recently H_(2)^(+)ion beam finds widespread use in many fields,and the demand of high-current H_(2)^(+)ion sources is urgent for numerous applications.However,there are currently almost no reported ion sources capable...Recently H_(2)^(+)ion beam finds widespread use in many fields,and the demand of high-current H_(2)^(+)ion sources is urgent for numerous applications.However,there are currently almost no reported ion sources capable of generating a directcurrent(DC)H_(2)^(+)beam with tens of mA current.In previous work at Peking University(PKU),H_(2)^(+)ion beams with a current of over 40 mA have been obtained in pulse mode,and a current of 16 mA was achieved in DC mode.In this paper,we report the generation of a DC H_(2)^(+)ion beam with a current of 22 mA extracted from an improved miniaturized microwave driven ion source(MMDIS).Beam analysis shows that the H_(2)^(+)fraction in the extracted beam is about 70%.The emittance of the mixed hydrogen beam is about 0.12π·mm·mrad.These results provide references for the applications of H_(2)^(+)beam and the design of H_(2)^(+)ion source.展开更多
基金supported by the National Natural Science Foundation of China(Grant No.11975036)support from the State Key Laboratory of Nuclear Physics and Technology at PKU.
文摘Recently H_(2)^(+)ion beam finds widespread use in many fields,and the demand of high-current H_(2)^(+)ion sources is urgent for numerous applications.However,there are currently almost no reported ion sources capable of generating a directcurrent(DC)H_(2)^(+)beam with tens of mA current.In previous work at Peking University(PKU),H_(2)^(+)ion beams with a current of over 40 mA have been obtained in pulse mode,and a current of 16 mA was achieved in DC mode.In this paper,we report the generation of a DC H_(2)^(+)ion beam with a current of 22 mA extracted from an improved miniaturized microwave driven ion source(MMDIS).Beam analysis shows that the H_(2)^(+)fraction in the extracted beam is about 70%.The emittance of the mixed hydrogen beam is about 0.12π·mm·mrad.These results provide references for the applications of H_(2)^(+)beam and the design of H_(2)^(+)ion source.
