Paper | Title | Page |
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MOPPH010 |
Development of a 14 GHz High Intensity Proton Source | |
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A high intensity ECR proton source with 14 GHz microwave heating was successfully developed at IMP. The idea of the working mechanism and the structure of the proton source, as well as using 14 GHz microwave heating, were first proposed in the world. The experimental platform was set up and preliminary commissioning was performed. The experimental results indicate that the source can produce a total of 4 mA CW hydrogen beams with microwave power of 200 W and extraction voltage of 40 kV, in which H2+ and H3+ are included. The successful commissioning of the proton source demonstrates that the proposed mechanism and the structure are feasible. | ||
WEOMMH02 | First Commissioning Results of An Evaporative Cooling Magnet ECRIS-LECR4 | 107 |
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LECR4 (Lanzhou ECR ion source No.4) is a room temperature ECR ion source, designed to produce high current, multiple charge state ions for SSC-linac project at IMP. The ion source has been optimized to be operated at 18 GHz. A unique feature of LECR4 is that all its solenoid coils are fully immersed in a special medium and cooled by evaporative cooling technology when excited. At design current, the coils can produce peak mirror fields on axis 2.3 Tesla at injection, 1.3 Tesla at extraction and 0.5 Tesla at minimum-B. The nominal radial magnetic field is 1.1 Tesla at plasma chamber wall, which is produced by a Halbach structure 36-segment hexapole. Recently, the project has made significant progress. In January 2014, the first plasma at 18 GHz was ignited. During the ongoing commissioning phase with a stainless steel chamber, tests with gaseous ion beams have been conducted. Some intense ion beams have been produced with microwave power less than 1.5 kW, such as 1.97 emA of O6+, 1.7 emA of Ar8+, 1.07 emA of Ar9+, 290 euA of Xe20+ and so on. In this paper, the design of LECR4 ion source will be presented, and the latest test results will also be given. | ||
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Slides WEOMMH02 [3.543 MB] | |