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

作　　者：冯冽 邓海啸 张彤 冯超 陈建辉 王兴涛 兰太和 沈磊 张文艳 姚海凤 刘晓庆 刘波 王东 

机构地区：[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences

出　　处：《Chinese Physics C》2015年第2期91-94,共4页中国物理C（英文版）

基　　金：Supported by Major State Basic Research Development Program of China(2011CB808300);National Natural Science Foundation of China(11175240,11205234,11322550)

摘　　要：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.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.

关 键 词：POLARIZATION DOAP Stokes parameters seeded-FEL 

分 类 号：O572.322[理学—粒子物理与原子核物理]