Simulation of Two Planes Painting Injection for HIAF-Bring

QU Guofeng; XIA Jiawen; YANG Jiancheng; LI Zhongshan; DU Heng; GE Wenwen; ZHENG Wenheng; LI Xiaoni; HU Xuejing; CHAI Weiping

doi:10.11804/NuclPhysRev.35.01.028

BRing is the main accelerator of High Intensity heavy Ion Accelerator Facility(HIAF) and its design current is 1×10¹¹ particles per pulse (²³⁸U³⁴⁺). To accumulate beams up to the design current, the injection gain has to reach 88. Two planes painting injection scheme is proposed for BRing. This scheme uses a tilted electrostatic septum and 8 bump magnets to paint beams into horizontal and vertical phase space simultaneously. It can inject enough beams into the ring in a short time and paint beams uniformly. The injection process is simulated using ORBIT code and 113 turns is injected into BRing with an injection efficiency of 97.7% which meets the requirement for beam current of BRing. The accumulated beams are distributed uniformly in transverse and hence have a little tune shift of -0.02 which reduces the risk of beam loss due to the resonance. Errors of injection parameters are analysed and the result shows two planes painting injection scheme has a high tolerance for errors of injection parameters.

Simulation of Two Planes Painting Injection for HIAF-Bring

1. Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

2. University of Chinese Academy of Sciences, Beijing 100049, China

Funds: National Natural Science Foundation of China (11505256, 11405237)

Received Date: 2017-05-03

Rev Recd Date: 2017-05-28

Publish Date: 2018-03-20

Key words:

Abstract: BRing is the main accelerator of High Intensity heavy Ion Accelerator Facility(HIAF) and its design current is 1×10¹¹ particles per pulse (²³⁸U³⁴⁺). To accumulate beams up to the design current, the injection gain has to reach 88. Two planes painting injection scheme is proposed for BRing. This scheme uses a tilted electrostatic septum and 8 bump magnets to paint beams into horizontal and vertical phase space simultaneously. It can inject enough beams into the ring in a short time and paint beams uniformly. The injection process is simulated using ORBIT code and 113 turns is injected into BRing with an injection efficiency of 97.7% which meets the requirement for beam current of BRing. The accumulated beams are distributed uniformly in transverse and hence have a little tune shift of -0.02 which reduces the risk of beam loss due to the resonance. Errors of injection parameters are analysed and the result shows two planes painting injection scheme has a high tolerance for errors of injection parameters.

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Reference (15)

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Simulation of Two Planes Painting Injection for HIAF-Bring

doi: 10.11804/NuclPhysRev.35.01.028

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