DONG Ziqiang, LI Peng, YANG Jiancheng, LIU Jie, XIE Wenjun, RUAN Shuang, WANG Geng, WANG Kedong, YAO Liping, CAI Fucheng. Simulation Results of Loss Distribution of U36+ due to Charge-exchange Process[J]. Nuclear Physics Review, 2019, 36(1): 49-54. doi: 10.11804/NuclPhysRev.36.01.049
Citation:
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DONG Ziqiang, LI Peng, YANG Jiancheng, LIU Jie, XIE Wenjun, RUAN Shuang, WANG Geng, WANG Kedong, YAO Liping, CAI Fucheng. Simulation Results of Loss Distribution of U36+ due to Charge-exchange Process[J]. Nuclear Physics Review, 2019, 36(1): 49-54. doi: 10.11804/NuclPhysRev.36.01.049
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Simulation Results of Loss Distribution of U36+ due to Charge-exchange Process
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DONG Ziqiang1,2,3
,
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LI Peng1
,
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YANG Jiancheng1,3
,
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LIU Jie1,2,3
,
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XIE Wenjun1,3
,
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RUAN Shuang1,3
,
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WANG Geng1,2,3
,
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WANG Kedong1,2,3
,
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YAO Liping1,2,3
,
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CAI Fucheng1,2,3
- 1.
Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;
- 2.
School of Nuclear Science and Technology, University of Chinese Academy of Sciences, Beijing 100049, China;
- 3.
Huizhou Research Center of Ion Sciences, Huizhou 516003, Guangdong, China
Funds:
National Natural Science Foundation of China (11675235); Special Funding for Introduced Innovative R&D Team of Guangdong(2016ZT06G73)
- Received Date: 2018-07-19
- Rev Recd Date:
2018-08-09
- Publish Date:
2019-03-20
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Abstract
During heavy ion accelerator operation, the charge exchange effect between ions and residual gas molecules is the key factor to influence beam lifetime. The charge exchange process has ions lost on the wall and leads to a dynamical vacuum change, which will seriously affect the accelerator operation and reduce the extraction beam intensity. The Institute of Modern Physics' future project, called High Intensity heavy ion Accelerator Facility (HIAF), will be built in Huizhou city, Guangdong Province, China. The Booster Ring (BRing) will provide 2×11 ppp 238U35+ for nuclear physics experiments. This article studies the track of particle U36+ before impacting on the wall, which is the reference particle U35+ losing one electron, and gets the U36+ loss distribution along the BRing. The simulation result shows that U36+ will be influenced seriously by dispersion elements, and will be lost in the drift sections after the dipoles. Collimators made out of materials with low desorption will be installed in the particles lost positions. The collimator efficiency after optimization can be larger than 95%. It also shows BRing average pressure change and beam intensity change between collimators on and off. The result points out that the BRing average pressure change will be less than 10% with collimators on, which makes BRing operate stably.
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Proportional views
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