Investigation of a method to calculate spontaneous radiation spectrafrom relativistic electrons in undulators

CHEN Ming-Zhi; HE Jian-Hua

doi:10.1088/1674-1137/33/1/013

Chinese Physics C> 2009, Vol. 33> Issue(1) : 58-64 DOI: 10.1088/1674-1137/33/1/013

Investigation of a method to calculate spontaneous radiation spectrafrom relativistic electrons in undulators

CHEN Ming-Zhi ,
HE Jian-Hua ^,

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Abstract：
Undulators are key devices to produce brilliant synchrotron radiation at the synchrotron radiation facilities. In this paper we present a numerical computing method, including the computing program that has been developed to calculate the spontaneous radiation emitted from relativistic electrons in undulators by simulating the electrons' trajectory. The effects of electron beam emittance and energy spread have also been taken into account. Comparing with other computing methods available at present, this method has a few advantages with respect to several aspects. It can adopt any measured or arbitrarily simulated 3D magnetic field and arbitrary electron beam pattern for the calculation and it's able to analyze undulators of any type of magnetic structure. It's expected to predict precisely the practical radiation spectrum. The
calculation results of a short period in-vacuum undulator and an Elliptically Polarized Undulator (EPU) at Shanghai Synchrotron Radiation Facility (SSRF) are presented as examples.

References

[1]

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CHEN Ming-Zhi and HE Jian-Hua. Investigation of a method to calculate spontaneous radiation spectrafrom relativistic electrons in undulators[J]. Chinese Physics C, 2009, 33(1): 58-64. doi: 10.1088/1674-1137/33/1/013

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Received: 2008-01-04
Revised: 2008-07-18

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Investigation of a method to calculate spontaneous radiation spectrafrom relativistic electrons in undulators

Corresponding author: HE Jian-Hua,

Received Date: 2008-01-04

Accepted Date: 2008-07-18

Available Online: 2009-01-11

Abstract:

Undulators are key devices to produce brilliant synchrotron radiation at the synchrotron radiation facilities. In this paper we present a numerical computing method, including the computing program that has been developed to calculate the spontaneous radiation emitted from relativistic electrons in undulators by simulating the electrons' trajectory. The effects of electron beam emittance and energy spread have also been taken into account. Comparing with other computing methods available at present, this method has a few advantages with respect to several aspects. It can adopt any measured or arbitrarily simulated 3D magnetic field and arbitrary electron beam pattern for the calculation and it's able to analyze undulators of any type of magnetic structure. It's expected to predict precisely the practical radiation spectrum. The
calculation results of a short period in-vacuum undulator and an Elliptically Polarized Undulator (EPU) at Shanghai Synchrotron Radiation Facility (SSRF) are presented as examples.

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Investigation of a method to calculate spontaneous radiation spectrafrom relativistic electrons in undulators

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