Parameter design considerations for an oscillator IR-FEL

Qi-Ka Jia

doi:10.1088/1674-1137/41/1/018101

Chinese Physics C> 2017, Vol. 41> Issue(1) : 018101 DOI: 10.1088/1674-1137/41/1/018101

Parameter design considerations for an oscillator IR-FEL

Qi-Ka Jia ^,

1.
National Synchrotron Radiation laboratory, University of Science and Technology of China, Hefei 230029, China

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Abstract：
An infrared oscillator FEL user facility will be built at the National Synchrotron Radiation Laboratory at in Hefei, China. In this paper, the parameter design of the oscillator FEL is discussed, and some original relevant approaches and expressions are presented. Analytic formulae are used to estimate the optical field gain and saturation power for the preliminary design. By considering both physical and technical constraints, the relation of the deflection parameter K to the undulator period is analyzed. This helps us to determine the ranges of the magnetic pole gap, the electron energy and the radiation wavelength. The relations and design of the optical resonator parameters are analyzed. Using dimensionless quantities, the interdependences between the radii of curvature of the resonator mirror and the various parameters of the optical resonator are clearly demonstrated. The effect of the parallel-plate waveguide is analyzed for the far-infrared oscillator FEL. The condition of the necessity of using a waveguide and the modified filling factor in the case of the waveguide are given, respectively.
- free electron laser ,
- oscillator ,
- parameters design

References

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Qi-Ka Jia. Parameter design considerations for an oscillator IR-FEL[J]. Chinese Physics C, 2017, 41(1): 018101. doi: 10.1088/1674-1137/41/1/018101

Qi-Ka Jia. Parameter design considerations for an oscillator IR-FEL[J]. Chinese Physics C, 2017, 41(1): 018101. doi: 10.1088/1674-1137/41/1/018101 shu

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Received: 2016-06-30

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Supported by National Nature Science Foundation of China (21327901, 11375199)

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Parameter design considerations for an oscillator IR-FEL

Corresponding author: Qi-Ka Jia,

1. National Synchrotron Radiation laboratory, University of Science and Technology of China, Hefei 230029, China

Received Date: 2016-06-30

Available Online: 2017-01-05

Fund Project: Supported by National Nature Science Foundation of China (21327901, 11375199)

Abstract: An infrared oscillator FEL user facility will be built at the National Synchrotron Radiation Laboratory at in Hefei, China. In this paper, the parameter design of the oscillator FEL is discussed, and some original relevant approaches and expressions are presented. Analytic formulae are used to estimate the optical field gain and saturation power for the preliminary design. By considering both physical and technical constraints, the relation of the deflection parameter K to the undulator period is analyzed. This helps us to determine the ranges of the magnetic pole gap, the electron energy and the radiation wavelength. The relations and design of the optical resonator parameters are analyzed. Using dimensionless quantities, the interdependences between the radii of curvature of the resonator mirror and the various parameters of the optical resonator are clearly demonstrated. The effect of the parallel-plate waveguide is analyzed for the far-infrared oscillator FEL. The condition of the necessity of using a waveguide and the modified filling factor in the case of the waveguide are given, respectively.

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Parameter design considerations for an oscillator IR-FEL

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