Smith-Purcell Free Electron Laser Based on T-Shaped Grating

Xianzhu Meng; Minghong Wang

doi:10.3788/AOS202040.1014001

Acta Optica Sinica, Volume. 40, Issue 10, 1014001(2020)

Smith-Purcell Free Electron Laser Based on T-Shaped Grating

Xianzhu Meng^* and Minghong Wang

Shandong Provincial Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Engineering, Liaocheng University, Liaocheng, Shandong 252059, China

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Figures & Tables(7)

Fig. 1. Schematic diagram of the SP FEL. (a) SP FEL based on T shape grating; (b) SP FEL based on rectangular grating

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Fig. 2. Parameters of gratings. (a) T shape grating; (b) rectangular grating

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Fig. 3. Simulation geometry of SP FEL

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Fig. 4. Distribution of kinetic energy along z axis of electron beam in SP FEL. (a) SP FEL based on T shape grating; (b) SP FEL based on rectangular grating

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Fig. 5. Evolution curve of output power of the SP FEL. (a) SP FEL based on T shape grating; (b) SP FEL based on rectangular grating

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Fig. 6. Corresponding FFT spectra of field power at output port of the SP FEL. (a) SP FEL based on T shape grating; (b) SP FEL based on rectangular grating

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Table 1. Resonator parameters and electron beam parameters of the SP FEL

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Table 1. Resonator parameters and electron beam parameters of the SP FEL

Parameter	Width of resonator /mm	Length of resonator /mm	Height of resonator /mm	Transverse size of beam /mm	Beam voltage /kV	Current /A	Number of periods
Value	1.5	36.9	0.75	0.5	50	10	32
Parameter	Period length of grating D /mm	Slot width of grating w /mm	Slot depth of grating d /mm	Gate width of T grating slot w' /mm		Inner depth of T grating slot d' /mm
Value	0.3	0.2	0.15	0.1		0.1