The beam-based calibration of an X-ray pinhole camera at SSRF

A pinhole camera for imaging X-ray synchrotron radiation from a dipole magnet is now in operation at the Shanghai Synchrotron Radiation Facility （SSRF） storage ring.The electron beam size is derived by unfolding the radiation image and the point spread function （PSF） with deconvolution techniques.Th...

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Bibliographic Details
Published inChinese physics C Vol. 36; no. 1; pp. 80 - 83
Main Author 冷用斌 黄国庆 张满洲 陈之初 陈杰 叶恺容
Format Journal Article
LanguageEnglish
Published IOP Publishing 2012
Subjects
Beams (radiation)
Calibration
Deviation
Pinhole cameras
Pinholes
Synchrotron radiation
X-rays
X射线
上海同步辐射装置
光源
校准
点扩散函数
辐射图像
针孔摄像机
针孔相机
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ISSN1674-1137
0254-3052
2058-6132
DOI10.1088/1674-1137/36/1/014

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Summary:A pinhole camera for imaging X-ray synchrotron radiation from a dipole magnet is now in operation at the Shanghai Synchrotron Radiation Facility （SSRF） storage ring.The electron beam size is derived by unfolding the radiation image and the point spread function （PSF） with deconvolution techniques.The performance of the pinhole is determined by the accuracy of the PSF measurement.This article will focus on a beam-based calibration scheme to measure the PSF system by varying the beam images with different quadrupole settings and fitting them with the corresponding theoretical beam sizes.Applying this method at SSRF,the PSF value of the pinhole is revised from 37 to 44μm.The deviation in beam size between the theoretical value and the measured value isminimized to 4% after calibration.This optimization allows us to observe the horizontal disturbance due to injection down to as small as 0.5μm.
Bibliography:LENG Yong-Bin 1,2;1） HUANG Guo-Qing 1,2 ZHANG Man-Zhou 1,2 CHEN Zhi-Chu 1,2 CHEN Jie 1,2 YE Kai-Rong 1,2 1 Shanghai Synchrotron Radiation Facility,Shanghai 201800,China 2 Shanghai Institute of Applied Physics,Shanghai 201800,China
11-5641/O4
beam diagnostics; X-ray pinhole camera; point spread function; beam size measurement
A pinhole camera for imaging X-ray synchrotron radiation from a dipole magnet is now in operation at the Shanghai Synchrotron Radiation Facility （SSRF） storage ring.The electron beam size is derived by unfolding the radiation image and the point spread function （PSF） with deconvolution techniques.The performance of the pinhole is determined by the accuracy of the PSF measurement.This article will focus on a beam-based calibration scheme to measure the PSF system by varying the beam images with different quadrupole settings and fitting them with the corresponding theoretical beam sizes.Applying this method at SSRF,the PSF value of the pinhole is revised from 37 to 44μm.The deviation in beam size between the theoretical value and the measured value isminimized to 4% after calibration.This optimization allows us to observe the horizontal disturbance due to injection down to as small as 0.5μm.
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ISSN:1674-1137
0254-3052
2058-6132
DOI:10.1088/1674-1137/36/1/014