| NUCLEAR PHYSICS |
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A Novel Method for Rigorously Analyzing Beam Loading Effect Based on the Macro-Particle Model |
| CHEN Qu-Shan1, PEI Yuan-Ji2**, HU Tong-Ning1, QIN Bin1** |
1State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074
2National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026
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| Cite this article: |
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CHEN Qu-Shan, PEI Yuan-Ji, HU Tong-Ning et al 2014 Chin. Phys. Lett. 31 012902 |
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Abstract The beam loading effect is a considerable issue for a high average current beam. We apply a novel method without utilizing the specious beam current value to rigorously analyze the beam loading effect in S-band linacs. By tracking every macro-particle's state and using the energy conservation law, power dissipated from the beam is calculated in each cell. In the new particle-based algorithm, the concept of equivalent beam current is proposed. Its value is not constant and it has a small variation through the accelerating structure. Also, we introduce the iteration algorithm as comparison and we find that the two algorithms coincide with each other very well.
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Received: 13 September 2013
Published: 28 January 2014
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| PACS: |
29.25.Bx
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(Electron sources)
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29.27.Bd
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(Beam dynamics; collective effects and instabilities)
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29.27.Fh
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(Beam characteristics)
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[1] Wang J W 1989 PhD Dissertation (California, USA: Stanford University)
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[4] Tang C X, Yang Y and Lin Y Z 1996 High Energy Phys. Nucl. Phys. 20 4
[5] Hu T N and Chen Q S 2013 Chin. Phys. C (accepted)
[6] Qin B, Tan P, Yang L and Liu X L 2013 Nucl. Instrum. Methods Phys. Res. Sect. A 727 90
[7] Young L M and Billen J H 2003 Parmela documentation LA-UR-96-1835
[8] Pei Y J 2013 Design Basis of Electron Linear Accelerator (Beijing: Science Press)
[9] Yao C G 1986 Electron Linear Accelerator (Beijing: Science Press) |
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