CAS OpenIR  > 中科院上海应用物理研究所2011-2018年
Optimization of the design for beamline with fast polarization switching elliptically polarized undulators
Cao, JF; Wang, Y; Zou, Y; Zhang, XZ; Wu, YQ; Tai, RZ; Tai, RZ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
2016
Source PublicationJOURNAL OF SYNCHROTRON RADIATION
ISSN1600-5775
Volume23Issue:-Pages:436—442
Subtype期刊文献
AbstractFast switching of X-ray polarization with a lock-in amplifier is a good method for acquiring weak signals from background noise for X-ray magnetic circular dichroism (XMCD) experiments. The usual way to obtain a beam with fast polarization switching is to use two series of elliptically polarized undulators (tandem twin EPUs). The two EPUs generate two individual beams. Each beam has a different polarization and is fast switched into the beamline. It is very important to ensure that the energy resolution, the flux and the spot size at the sample of the two beams are equal in XMCD experiments. However, it is difficult in beamline design because the distances from the two EPUs to the beamline optics are different and the beamline is not switchable. In this work, a beamline design without an entrance slit for fast polarization switching EPUs is discussed. The energy resolution of the two beams can be tuned to be equal by minor rotation of the optics in the monochromator. The flux of the two beams can be balanced through separation blades X, Y in the exit slit, and by adjusting the position of the X blades along the beam. The spot size of the two beams can be adjusted to be equal by shifting the sample as well.
KeywordTwin-helical Undulator X-ray Beamline Synchrotron-radiation Insertion Devices Bessy-ii Spring-8 Resolution
DOI10.1107/S160057751600059X
Indexed BySCI
Language英语
WOS IDWOS:000371387900008
Citation statistics
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/25796
Collection中科院上海应用物理研究所2011-2018年
Corresponding AuthorWang, Y; Wu, YQ; Tai, RZ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China.
Recommended Citation
GB/T 7714
Cao, JF,Wang, Y,Zou, Y,et al. Optimization of the design for beamline with fast polarization switching elliptically polarized undulators[J]. JOURNAL OF SYNCHROTRON RADIATION,2016,23(-):436—442.
APA Cao, JF.,Wang, Y.,Zou, Y.,Zhang, XZ.,Wu, YQ.,...&Tai, RZ .(2016).Optimization of the design for beamline with fast polarization switching elliptically polarized undulators.JOURNAL OF SYNCHROTRON RADIATION,23(-),436—442.
MLA Cao, JF,et al."Optimization of the design for beamline with fast polarization switching elliptically polarized undulators".JOURNAL OF SYNCHROTRON RADIATION 23.-(2016):436—442.
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