Optimization of the design for beamline with fast polarization switching elliptically polarized undulators
文献类型：期刊论文
| 作者 | Cao, JF; Wang, Y; Zou, Y; Zhang, XZ; Wu, YQ; Tai, RZ |
| 刊名 | JOURNAL OF SYNCHROTRON RADIATION
 |
| 出版日期 | 2016 |
| 卷号 | 23期号:-页码:436—442 |
| 关键词 | TWIN-HELICAL UNDULATOR X-RAY BEAMLINE SYNCHROTRON-RADIATION INSERTION DEVICES BESSY-II SPRING-8 RESOLUTION |
| ISSN号 | 1600-5775 |
| 通讯作者 | Wang, Y ; Wu, YQ ; Tai, RZ (reprint author), Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China. |
| 英文摘要 | Fast 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. |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000371387900008 |
| 源URL | [http://ir.sinap.ac.cn/handle/331007/25796]  |
| 专题 | 上海应用物理研究所_中科院上海应用物理研究所2011-2017年 |
| 推荐引用方式 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. |
入库方式： OAI收割
来源：上海应用物理研究所
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