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Field Distribution of a Planar Electrostatic Wiggler and Modulation Effect on the Motion of Relativistic Electrons

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Abstract

A planar electrostatic wiggler is formed by two parallel metallic plates, where the upper-plate is corrugated with sinusoidal ripples and connected to a negative voltage and the lower-plate is smooth and grounded. The field distribution is mathematically derived in detail. It is demonstrated that this planar electrostatic wiggler can efficiently modulate the motion of relativistic electrons just as a magneto-static wiggler does in a free-electron laser. Results obtained here will provide basis to analyze the amplification mechanism of a fast wave by a relativistic electron beam in a planar electrostatic wiggler.

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Acknowledgments

The author thanks Mr. Y. Zhang for his assistance of the CST simulation in Fig. 3. This work is partly supported by the China University-College PhD Science Foundation (No. 200806130012) and the NSFC (no. 60871023).

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  1. Institute of Photoelectronics, School of Information Science and Technology, Southwest Jiaotong University, Campus Mail Box 50, Chengdu, Sichuan, 610031, People’s Republic of China

    Shi-Chang Zhang

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Zhang, SC. Field Distribution of a Planar Electrostatic Wiggler and Modulation Effect on the Motion of Relativistic Electrons. J Infrared Milli Terahz Waves 31, 249–258 (2010). https://doi.org/10.1007/s10762-009-9586-3

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