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

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

doi:10.1088/1674-1137/39/2/028101

Chinese Physics C> 2015, Vol. 39> Issue(2) : 028101 DOI: 10.1088/1674-1137/39/2/028101

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

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Abstract：
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.

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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 and WANG Dong. Single-shot measurement of free-electron laser polarization at SDUV-FEL[J]. Chinese Physics C, 2015, 39(2): 028101. doi: 10.1088/1674-1137/39/2/028101

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Received: 2014-04-11
Revised: 2014-07-03

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