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The beam-based calibration of an X-ray pinhole camera at SSRF
- Source :
- Chinese Physics C. 36:80-83
- Publication Year :
- 2012
- Publisher :
- IOP Publishing, 2012.
-
Abstract
- 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 44 μm. The deviation in beam size between the theoretical value and the measured value is minimized to 4% after calibration. This optimization allows us to observe the horizontal disturbance due to injection down to as small as 0.5 μm.
- Subjects :
- Point spread function
Physics
Nuclear and High Energy Physics
business.industry
Astrophysics::Instrumentation and Methods for Astrophysics
Synchrotron radiation
Astronomy and Astrophysics
law.invention
Optics
law
Pinhole camera
Calibration
Physics::Accelerator Physics
Pinhole (optics)
Deconvolution
business
Instrumentation
Beam (structure)
Storage ring
Subjects
Details
- ISSN :
- 16741137
- Volume :
- 36
- Database :
- OpenAIRE
- Journal :
- Chinese Physics C
- Accession number :
- edsair.doi...........d0b4ba9f2a51c08ce2ef91e9cae6e46a