Polarization properties of a crossed planar undulator

被引：14

作者：

Li, Y. ^{[1
]}

Faatz, B. ^{[1
]}

Pflueger, J. ^{[1
]}

机构：

[1] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2010年 / 613卷 / 01期

关键词：

XFEL; Degree of polarization; Stokes parameters; Crossed undulator;

D O I：

10.1016/j.nima.2009.11.051

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

Instead of using a helical undulator, another method to generate circularly polarized radiation in an FEL is to utilize two crossed planar undulators. The main benefit of the crossed undulator over the helical option is that its structure is simpler so that it is technically and economically more convenient. Unlike a helical undulator, two orthogonal polarizations are respectively generated from two crossed undulators and their combination comprises circularly polarized radiation. Therefore, the overlap and resemblance of the two polarizations determine the quality of the composed radiation field. The 3D simulations have been performed with parameters from the European XFEL. Polarization has been studied in detail and optimization of the crossed undulator length has also been done. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：163 / 168

页数：6

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