Design of the low energy beam transport line for the China spallation neutron source

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LI Jin-Hai, OUYANG Hua-Fu, FU Shi-Nian, ZHANG Hua-Shun and HE Wei. Design of the low energy beam transport line for the China spallation neutron source[J]. Chinese Physics C, 2008, 32(3): 227-231. doi: 10.1088/1674-1137/32/3/014
LI Jin-Hai, OUYANG Hua-Fu, FU Shi-Nian, ZHANG Hua-Shun and HE Wei. Design of the low energy beam transport line for the China spallation neutron source[J]. Chinese Physics C, 2008, 32(3): 227-231.  doi: 10.1088/1674-1137/32/3/014 shu
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Received: 2007-05-22
Revised: 2007-06-13
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Design of the low energy beam transport line for the China spallation neutron source

    Corresponding author: LI Jin-Hai,

Abstract: 

The design of the China Spallation Neutron Source (CSNS) low-energy beam transport (LEBT) line, which locates between the ion source and the radio-frequency quadrupole (RFQ), has been completed with the TRACE3D code. The design aims at perfect matching, primary chopping, a small emittance growth and sufficient space for beam diagnostics. The line consists of three solenoids, three vacuum chambers, two steering magnets and a pre-chopper. The total length of LEBT is about 1.74m. This LEBT is designed to transfer 20mA of H-pulsed beam from the ion source to the RFQ. An induction cavity is adopted as the pre-chopper. The electrostatic octupole steerer is discussed as a candidate. A four-quadrant aperture for beam scraping and beam position monitoring is designed.

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