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2024年10月30日
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

  • 1.

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

  • 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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  • References

    [1] J. M. Ortega, F. Glotin, R. Prazeres, Infrared Physics Technology, 49:133-138(2006)
    [2] D. Oepts and A. F. G. van der Meer, Start-up and radiation characteristics of the FELIX longwavelength FEL in the vicinity of a tuning gap, in Proceedings of FEL2010, TUOC4, (Malm, Sweden, 2010), p.323
    [3] W. Schllkopf et al, The IR and THz FEL at the Fritz-Haber-Institut, in Proceedings of FEL'13, WEPSO62, p.657
    [4] W. B. Colson, P. Elleaume, Appl. Phys. B 29:101-106(1982)
    [5] D. Oepts, A. F. G. Van Der Meer and P. W. Van Amersfoor, Infrared Phys. Technol., 36(1):297-308(1995)
    [6] W. B. Colson, J. L. Richardson, Phys. Rev. Lett., 50:1050(1983)
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    [10] Qika Jia, Chinese Physics C, 39:048101(2015)
    [11] Qika Jia, High Power Laser and Particle Beam, 1(2):175(1989) (in Chinese); Qika Jia, Phys. Lett. A, 134:121(1988)
    [12] Qika Jia, Chin. Phys. Lett., 6(12):533(1989)
    [13] Qika Jia, An analysis of optimum out-coupling fraction for maximum output power in oscillator FEL, in Proceedings FEL 2014, TUP008
    [14] Qika Jia, Analysis of spontaneous emission and its self-amplification, in free-electron laser, FLS 2006, DESY Hamburg; http:/adweb.desy.de/mpy/FLS2006/proceedings/index.htm
    [15] 7 GeV Advanced Photon Source conceptual design report, ANL-87-15. ANL, 1987
    [16] Qi-ka Jia, High Power Laser and Particle Beams, 14(2):165-168(2002) (in Chinese)
    [17] J Walker R. P., Nuclum. Instrum. Methods A, 335:328-337(1993)
    [18] S. Benson, Nucl. Instrum. Methods A, 304:773(1991)
    [19] Charles A. Brau, Free-Electron Lasers, (Academic Press Inc, 1990), p. 328
    [20] S. K. Ride, R. H. Pantell, and J. Feinstein, Appl. Phys. Lett., 57:1283(1990)
    [21] A. Doria, G. P. Gallerano, A. Renieri, Opt. Commun., 80:417(1991)
    [22] R. Bartolini et al, Nucl. Instrum. Methods A, 304:417(1991)
    [23] Qika Jia, IEEE Journal of Quantum Electronics, 49 (3):309-313(2013)

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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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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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