Design of a New DC-RF Injector Used in High Average Power FEL

HU Yan-Le; ZHAO Kui; CHEN Jia-Er; ZHANG Bao-Cheng; HAO Jian-Kui; WANG Li-Fang

Chinese Physics C> 2001, Vol. 25> Issue(8) : 787-792

Design of a New DC-RF Injector Used in High Average Power FEL

Institute of Heavy Ion Physics, Peking University, Beijing 100871, China

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Abstract：
Here we give the design proposal of a new DC-RF injector used in high average power FEL. The injector includes a Pierce gun and a 1+1/2 SC cavity. It will be able to provide high average beam current because it can work in CW mode. By changing the shape of the first 1/2 cell of SC cavity to enforce the focusing effect, we can decrease the distance between photocathode and SC cavity. Thus, the growth of emittance can be suppressed effectively. Through the simulation of particle dynamics with PARMELA, the shape of Pierce gun and the optimized synchronous phase of the SC cavity can be decided. The simulation results show that this kind of injector is feasible.

References

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HU Yan-Le, ZHAO Kui, CHEN Jia-Er, ZHANG Bao-Cheng, HAO Jian-Kui and WANG Li-Fang. Design of a New DC-RF Injector Used in High Average Power FEL[J]. Chinese Physics C, 2001, 25(8): 787-792.

HU Yan-Le, ZHAO Kui, CHEN Jia-Er, ZHANG Bao-Cheng, HAO Jian-Kui and WANG Li-Fang. Design of a New DC-RF Injector Used in High Average Power FEL[J]. Chinese Physics C, 2001, 25(8): 787-792. shu

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Received: 2000-08-07
Revised: 1900-01-01

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Design of a New DC-RF Injector Used in High Average Power FEL

Corresponding author: HU Yan-Le,

Institute of Heavy Ion Physics, Peking University, Beijing 100871, China

Received Date: 2000-08-07

Accepted Date: 1900-01-01

Available Online: 2001-08-05

Abstract: Here we give the design proposal of a new DC-RF injector used in high average power FEL. The injector includes a Pierce gun and a 1+1/2 SC cavity. It will be able to provide high average beam current because it can work in CW mode. By changing the shape of the first 1/2 cell of SC cavity to enforce the focusing effect, we can decrease the distance between photocathode and SC cavity. Thus, the growth of emittance can be suppressed effectively. Through the simulation of particle dynamics with PARMELA, the shape of Pierce gun and the optimized synchronous phase of the SC cavity can be decided. The simulation results show that this kind of injector is feasible.

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Design of a New DC-RF Injector Used in High Average Power FEL

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通讯作者: 陈斌, bchen63@163.com

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