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

中国物理C, 2008, 32(3): 227-231.

^1, , ^2, , ^3, , ^4, , ^5,

1.Institute of High Energy Physics, CAS, Beijing 100049, China

2.Institute of High Energy Physics, CAS, Beijing 100049, China

3.Institute of High Energy Physics, CAS, Beijing 100049, China

4.Institute of High Energy Physics, CAS, Beijing 100049, China

5.Institute of High Energy Physics, CAS, Beijing 100049, China

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

LI Jin-Hai ^1, , OUYANG Hua-Fu ^2, , FU Shi-Nian ^3, , ZHANG Sua-Shun ^4, , HE Wei ^5,

1.Institute of High Energy Physics, CAS, Beijing 100049, China

2.Institute of High Energy Physics, CAS, Beijing 100049, China

3.Institute of High Energy Physics, CAS, Beijing 100049, China

4.Institute of High Energy Physics, CAS, Beijing 100049, China

5.Institute of High Energy Physics, CAS, Beijing 100049, China

Keywords： CSNS

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 1.74 m. This LEBT is designed to transfer 20 mA 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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Design of the low energy beam transport line for the China spallation neutron source

参考文献