Application of Magnetic Materials in Synchrotron Radiation and Free Electron Laser

doi:10.15541/jim20160177

Abstract

Abstract:

The synchrotron radiation and free electron laser are electromagnetic radiation light sources which are both generated by the relativistic electron beam. Both sources have been widely used in the national economic, scientific and technical researches, national defense and military fields. The insert device made of permanent magnet is one of the key equipments of the synchrotron radiation light source and the free electron laser facility. Magnetic properties and quality of magnetic materials especially have significant influence on magnetic field quality, magnetic field peak value, magnetic field stability and operation scheme of insert devices. This paper reviewed characteristics of synchrotron radiation and free electron laser, and their conceptual application.

Key words: synchrotron radiation, free electron laser, permanent magnet insert device, magnetic materials.

CLC Number:

HE Yong-Zhou, ZHOU Qiao-Gen. Application of Magnetic Materials in Synchrotron Radiation and Free Electron Laser[J]. Journal of Inorganic Materials, 2016, 31(10): 1031-1038.

Figures/Tables 12

Fig. 1 Synchrotron radiation light[4]

Fig. 2 Layout of SSRF for China[11]

Fig. 3 Layout of SXFEL free electron laser facility for China[17]

Fig. 4 Three kinds of synchrotron radiation light[15] (a) Bending iron; (b) Wiggler; (c) Undulator

Fig. 5 Spectra of synchrotron radiation[15]

Fig. 6 Ideal Halbach magnetic circuit[1]

Fig. 7 Flux distribution of standard Halbach structure[1]

Fig. 8 Synchrotron radiation light mode[17] (a) Horizontal; (b) Vertical; (c) Line inclined; (d) Elliptical polarization

Fig. 9 Typical insert device[17] (a) In-vacuum undulator; (b) Elliptically polarized undulator

Fig. 10 Magnetic properties of the permanent magnet for China[19]

Fig. 11 Permanent magnets array of undulator beam[17]

Fig. 12 Typical coating of permanent magnet (a) NiCuNi; (b)TiN

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