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Beam Dynamics Design of a 50mA D$^{+}$ RFQ |
| Fang-Jian Jia1, Kun Zhu1**, Yuan-Rong Lu1**, Zhi Wang1, Zhi-Yu Guo1, Qi Fu1, Yuan He2 |
1State Key Lab of Nuclear Physics and Technology, Peking University, Beijing 100871
2Institute of Modern Physics, China Academy of Sciences, Lanzhou 730000
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| Cite this article: |
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Fang-Jian Jia, Kun Zhu, Yuan-Rong Lu et al 2016 Chin. Phys. Lett. 33 072901 |
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Abstract A new 973 project was proposed by Peking University and Institute of Modern Physics of Chinese Academy of Sciences recently. The project requires a 50 mA, 162.5 MHz, cw mode radio frequency quadrupole (RFQ) to accelerate the D$^{+}$ to 1 MeV. In a high-current linear accelerator, the strong space charge effect causes the growth of envelope and emittance along with heavy beam losses. In the beam dynamics design of this RFQ, beam envelope mismatching is discussed and a matching dynamics method is proposed to minimize the envelope and emittance growth. The influence of limiting current on the beam transmission is discussed and used in the optimization of transverse and longitudinal parameters. After the optimization, the beam transmission efficiency reaches higher than 98%.
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Received: 25 February 2016
Published: 01 August 2016
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| PACS: |
29.27.Bd
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(Beam dynamics; collective effects and instabilities)
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29.20.Ej
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(Linear accelerators)
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