標題: Design concept of an electromagnetic undulator to produce arbitrarily polarized light
作者: Chung, Ting-Yi
Chen, Sei-Da
Jan, Jyh-Chyuan
Hwang, Ching-Shiang
電子物理學系
Department of Electrophysics
關鍵字: Elliptical-polarization electromagnetic undulator;Magnetic Circular Dichroism;Polarized photon beam;Fast switching polarization;Current switch circuit
公開日期: 1-Jun-2020
摘要: An undulator magnet design is described consisting of four electromagnet arrays to produce arbitrarily polarized photon beams including a linear inclined mode. Polarization changes are effected by a current switch rather than mechanical longitudinal translations. The capability of choosing a variety of current excitations in each double coil of the structure can produce any desired polarization mode. This concept exhibits an advantage over mechanical designs especially for superconducting design versions of this undulator. In this paper, we will discuss the magnet structure concept, the current distribution in each double coil and magnetic field features for various polarizing modes. In addition, the concept of current switching will be discussed, which allows to reduce the number of individual current sources from eight to one.
URI: http://dx.doi.org/10.1016/j.nima.2020.163786
http://hdl.handle.net/11536/154090
ISSN: 0168-9002
DOI: 10.1016/j.nima.2020.163786
期刊: NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume: 964
起始頁: 0
結束頁: 0
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