| Smith-Purcell free electron laser based on the semi-elliptical resonator |
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| 作者姓名： | 孟现柱 王明红 任忠民 |
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| 作者单位： | School of Physics Science and Information Engineering,Liaocheng University |
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| 基金项目： | Project supported by the National Natural Science Foundation of China (Grant No. 60871047) and the Natural Science Foundation of Liaocheng University of China (Grant No. X0810018). |
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| 摘 要： | A novel Smith-Purcell(S-P) free electron laser composed of an electron gun,a semi-elliptical resonator,a metallic reflecting grating and a collector,is presented for the first time.This paper studies the characteristics of this device by theoretical analysis and particle-in-cell simulation method.Results indicate that tunable coherent S-P radiation with a high output peak power at millimeter wavelengths can be generated by adjusting the length of the grating period,or adjusting the voltage of the electron beam.The present scheme has the following advantages:the semi-elliptical resonator can reflect all radiation with the emission angle θ and random azimuthal angles,back onto the electron beam with same-phase and causes the electrons to be modulated,so the output power and efficiency are improved.
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| 关 键 词： | Smith-Purcell radiation free electron laser quasi optical resonator |
| 收稿时间： | 2010-10-26 |
Smith–Purcell free electron laser based on the semi-elliptical resonator |
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| Meng Xian-Zhu,Wang Ming-Hong and Ren Zhong-Min.Smith-Purcell free electron laser based on the semi-elliptical resonator[J].Chinese Physics B,2011,20(5):50702-050702. |
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| Authors: | Meng Xian-Zhu Wang Ming-Hong and Ren Zhong-Min |
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| Institution: | School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China;School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China;School of Physics Science and Information Engineering, Liaocheng University, Liaocheng 252059, China |
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| Abstract: | A novel Smith–Purcell (S–P) free electron laser composed of an electron gun, a semi-elliptical resonator, a metallic reflecting grating and a collector, is presented for the first time. This paper studies the characteristics of this device by theoretical analysis and particle-in-cell simulation method. Results indicate that tunable coherent S–P radiation with a high output peak power at millimeter wavelengths can be generated by adjusting the length of the grating period, or adjusting the voltage of the electron beam. The present scheme has the following advantages: the semi-elliptical resonator can reflect all radiation with the emission angle θ and random azimuthal angles, back onto the electron beam with same-phase and causes the electrons to be modulated, so the output power and efficiency are improved. |
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| Keywords: | Smith–Purcell radiation free electron laser quasi optical resonator |
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