Electromagnetic modeling of the CSNS H- ion source extraction system

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WU Xiao-Bing and OUYANG Hua-Fu. Electromagnetic modeling of the CSNS H- ion source extraction system[J]. Chinese Physics C, 2012, 36(4): 371-375. doi: 10.1088/1674-1137/36/4/014
WU Xiao-Bing and OUYANG Hua-Fu. Electromagnetic modeling of the CSNS H- ion source extraction system[J]. Chinese Physics C, 2012, 36(4): 371-375.  doi: 10.1088/1674-1137/36/4/014 shu
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Received: 2011-07-06
Revised: 2011-07-25
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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Electromagnetic modeling of the CSNS H- ion source extraction system

Abstract: A Penning surface H- ion source test stand has been developed for the China Spallation Neutron Source (CSNS) at the Institute of High Energy Physics (IHEP). H- beams with a current up to 50 mA and a pulse length up to 520μs at a repetition rate of 25 Hz are obtained at present. In order to improve the extraction system based on both the results of the emittance measurements in experiment and the simulation results of the effect of the extraction system on the beam emittance, three dimensional electromagnetic finite element analysis and particle tracking are undertaken. First, the magnetic field of the deflecting magnet is studied in detail, and then the effect of the extraction geometry on the beam transport is also investigated.

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