Single-shot measurement of free-electron laser polarization at SDUV-FEL

In this paper, a division-of-amplitude photopolarimeter (DOAP) for measuring the polarization state of a free-electron laser (FEL) pulse is described. The incident FEL beam is divided into four separate beams, and four Stokes parameters can be measured in a single-shot. In the crossed-planar undulat...

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Bibliographic Details
Published in:Chinese physics C 2015-02, Vol.39 (2), p.28101-1-028101-4
Main Authors: Feng, Lie, Deng, Hai-Xiao, Zhang, Tong, Feng, Chao, Chen, Jian-Hui, Wang, Xing-Tao, Lan, Tai-He, Shen, Lei, Zhang, Wen-Yan, Yao, Hai-Feng, Liu, Xiao-Qing, Liu, Bo, Wang, Dong
Format: Article
Language:English
Subjects:
Coherence
Construction
Free electron lasers
Measuring instruments
Photopolarimeters
Polarization
Stokes parameters
Test facilities
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Summary:In this paper, a division-of-amplitude photopolarimeter (DOAP) for measuring the polarization state of a free-electron laser (FEL) pulse is described. The incident FEL beam is divided into four separate beams, and four Stokes parameters can be measured in a single-shot. In the crossed-planar undulators experiment at the Shanghai deep ultraviolet FEL test facility, this DOAP instrument constructed in house responsed accurately and timely while the polarization-state of fully coherent FEL pulses were switched, which is helpful for confirming the crossed-planar undulators technique for short-wavelength FELs.
ISSN:1674-1137
DOI:10.1088/1674-1137/39/2/028101