The development of a room temperature electron cyclotron resonance ion source (Lanzhou electron cyclotron resonance ion source No. 4) with evaporative cooling technology at Institute of Modern Physics.
LECR4 (Lanzhou electron cyclotron resonance ion source No. 4) has been successfully constructed at IMP and has also been connected with the Low Energy Beam Transport (LEBT) and Radio Frequency Quadrupole (RFQ) systems. These source magnet coils are cooled through evaporative cooling technology, which is the first attempt with an ECR ion source in the world. The maximum mirror field is 2.5 T (with iron plug) and the effective plasma chamber volume is 1.2 l. It was designed to be operated at 18 GHz and aimed to produce intense multiple charge state heavy ion beams for the linear injector project SSC-Linac at IMP. In February 2014, the first analyzed beam at 18 GHz was extracted. During about three months' commissioning, some outstanding results have been achieved, such as 1.97 emA of O(6+), 1.7 emA of Ar(8+), 1.07 emA of Ar(9+), and 118 euA of Bi(28+). The source has also successfully delivered O(5+) and Ar(8+) ion beams for RFQ commissioning in April 2014. This paper will give a brief overview of the design of LECR4. Then, the latest results of this source at 18 GHz will be presented.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Lu
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Sun
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Qian
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Guo
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Fang
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Feng
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Yang
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Ma
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Zhang
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Ma
Institute of Electrical Engineering, CAS, Beijing 100190, China.
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Xiong
Institute of Electrical Engineering, CAS, Beijing 100190, China.
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Guo
Institute of Electrical Engineering, CAS, Beijing 100190, China.
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Ruan
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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Zhao