Influence of the photon beam position on incident SR intensity at the SXMCD endstation

GUO Yu-Xian; XU Peng-Shou

doi:10.1088/1674-1137/37/12/128002

Chinese Physics C> 2013, Vol. 37> Issue(12) : 128002 DOI: 10.1088/1674-1137/37/12/128002

Influence of the photon beam position on incident SR intensity at the SXMCD endstation

GUO Yu-Xian ^, ,
XU Peng-Shou

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Abstract：
A small fluctuation of the photon beam position will affect the intensity and polarization characteristics of synchrotron radiation (SR) when it enters an endstation through the related beamline. In this paper, by changing the electron orbit equilibrium position in the vertical direction, we have measured the corresponding changes in the absorption strength of the SR with a gold mesh in different chopper aperture positions. It is found that for three aperture positions, the absorption intensity of the gold mesh shows a good Gaussian distribution as the photon beam position moves, while the ratio of the SR intensity passing through the upper and lower apertures shows a monotonous variation. This suggests a new method for estimating the circular polarization degree of SR originating from the bending magnet based on our current measurement.

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Funk T, Deb A, George S J et al. Coordin. Chem. Rev., 2005, 249: 3[2] Sánchez-Hanke C, Kao C-C. J. Magn. Magn. Mater., 2001, 226-230: 1803[3] Sato K, Ueji Y, Okitsu K et al. J. Synchrotron Rad., 2001, 8: 1021[4] Holldack K, Kachel T, Schafers F et al. Rev. Sci. Instrum., 1996, 67: 2485[5] MacDonald M A, Schaefers F, Pohl R et al. Rev. Sci. Instrum., 2008, 79: 025108[6] GUO Zhi-Ying, XI Shi-Bo, ZHU Jing-Tao et al. Chin. Phys. C, 2013, 37: 018001[7] SUN Bao-Gen, LIN Shun-Fu, HE Duo-Hui et al. High Power Laser and Particle Beams, 2006, 18: 143 (in Chinese)[8] WANG Jie, LI Hong-Hong, WANG Feng et al. Nuclear Techniques, 2005, 28: 489 (in Chinese)

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GUO Yu-Xian and XU Peng-Shou. Influence of the photon beam position on incident SR intensity at the SXMCD endstation[J]. Chinese Physics C, 2013, 37(12): 128002. doi: 10.1088/1674-1137/37/12/128002

GUO Yu-Xian and XU Peng-Shou. Influence of the photon beam position on incident SR intensity at the SXMCD endstation[J]. Chinese Physics C, 2013, 37(12): 128002. doi: 10.1088/1674-1137/37/12/128002 shu

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Received: 2013-03-13
Revised: 2013-05-03

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Influence of the photon beam position on incident SR intensity at the SXMCD endstation

GUO Yu-Xian ^,
XU Peng-Shou

Corresponding author: GUO Yu-Xian,

Received Date: 2013-03-13
Accepted Date: 2013-05-03
Available Online: 2013-12-05

Abstract: A small fluctuation of the photon beam position will affect the intensity and polarization characteristics of synchrotron radiation (SR) when it enters an endstation through the related beamline. In this paper, by changing the electron orbit equilibrium position in the vertical direction, we have measured the corresponding changes in the absorption strength of the SR with a gold mesh in different chopper aperture positions. It is found that for three aperture positions, the absorption intensity of the gold mesh shows a good Gaussian distribution as the photon beam position moves, while the ratio of the SR intensity passing through the upper and lower apertures shows a monotonous variation. This suggests a new method for estimating the circular polarization degree of SR originating from the bending magnet based on our current measurement.

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Influence of the photon beam position on incident SR intensity at the SXMCD endstation

Corresponding author: GUO Yu-Xian,

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目录

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[3]	FAN Ping , YUAN Da-Qing , ZUO Yi , ZHENG Yong-Nan , ZHOU Dong-Mei , WU Xiao-Guang , LI Guang-Sheng , ZHU Li-Hua , XU Guo-Ji , FAN Qi-Wen , ZHANG Xi-Zhen , ZHU Sheng-Yun . Proton alignment in ⁸²Sr investigated by g-factor measurements. Chinese Physics C, 2009, 33(S1): 206-208. doi: 10.1088/1674-1137/33/S1/066
[4]	SHEN Shui-Fa , YU Xiao-Han . Decay of ⁸³Sr and Discussion of Its Daughter's Band Structures. Chinese Physics C, 2004, 28(S1): 78-80.
[5]	LI Ming-Liang , ZHU Sheng-Jiang , CHE Xing-Lai , YU Ying-Nan . Research on Two-Quasiparticle Bands in ⁹⁸Sr. Chinese Physics C, 2004, 28(S1): 75-77.
[6]	WANG Man , LI Jin , CUI Xiang-Zong , XIA Xiao-Mi , LAI Yuan-Fen , YAO Xiao-Guang . PROTOTYPE OF END CAP SHOWER COUNTERAND ITS BEAM TEST. Chinese Physics C, 1987, 11(3): 321-326.