Smith–Purcell free electron laser based on the semi-elliptical resonator

doi:10.1088/1674-1056/20/5/050702

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.

Keywords: Smith–Purcell radiation free electron laser quasi optical resonator

Received: 26 October 2010
Revised: 29 December 2010
Accepted manuscript online:

PACS:	07.57.-c	(Infrared, submillimeter wave, microwave and radiowave instruments and equipment)
	41.60.Cr	(Free-electron lasers)
	52.59.Rz	(Free-electron devices)
	42.60.Da	(Resonators, cavities, amplifiers, arrays, and rings)

Fund: 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).

Cite this article:

Meng Xian-Zhu(孟现柱),Wang Ming-Hong(王明红), and Ren Zhong-Min(任忠民) Smith–Purcell free electron laser based on the semi-elliptical resonator 2011 Chin. Phys. B 20 050702

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Smith–Purcell free electron laser based on the semi-elliptical resonator

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