Beam based calibration of X-ray pinhole camera in SSRF

Details Beam based calibration of X-ray pinhole camera in SSRF Beam based calibration of X-ray pinhole camera in SSRF

2011-03-25

arxiv.org/abs/1103.4911v1

Physics

Nuclear Physics

Nuclear Experiment

Scientific paper

The Shanghai Synchrotron Radiation Facility (SSRF) contains a 3.5-GeV storage ring serving as a national X-ray synchrotron radiation user facility characterized by a low emittance and a low coupling. The stability and quality of the electron beams are monitored continuously by an array of diagnostics. In particular, an X-ray pinhole camera is employed in the diagnostics beamline of the ring to characterize the position, size, and emittance of the beam. The performance of the measurement of the transverse electron beam size is given by the width of the point spread function (PSF) of the X-ray pinhole camera. Typically the point spread function of the X-ray pinhole camera is calculated via analytical or numerical method. In this paper we will introduce a new beam based calibration method to derive the width of the PSF online.

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