Emittance measurement at the NSLS x-ray ring

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A pinhole camera for imaging x-ray synchrotron radiation from a dipole magnet is now in operation at the NSLS X-Ray Ring. The pinhole camera detector is a 0.5 mm thick YAG phosphor screen viewed by a video camera. Both the theoretical pinhole diffraction pattern and the measured modulation transfer function (MTF) of the phosphor and camera have been deconvolved from the measured profile in order to derive the true transverse profile of the electron beam. This profile was then fit to a 2-dimensional Gaussian. The electron beam emittance as a function of the phase space acceptance of the pinhole camera ... continued below

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4 p.

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Safranek, J. & Stefan, P. M. Summer 1996.

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Description

A pinhole camera for imaging x-ray synchrotron radiation from a dipole magnet is now in operation at the NSLS X-Ray Ring. The pinhole camera detector is a 0.5 mm thick YAG phosphor screen viewed by a video camera. Both the theoretical pinhole diffraction pattern and the measured modulation transfer function (MTF) of the phosphor and camera have been deconvolved from the measured profile in order to derive the true transverse profile of the electron beam. This profile was then fit to a 2-dimensional Gaussian. The electron beam emittance as a function of the phase space acceptance of the pinhole camera has been derived, so the horizontal and vertical electron emittances can be deduced from the major and minor sigmas of the fit Gaussian. In the X-Ray Ring, the vertical emittance is kept small to maximize the synchrotron radiation brightness. The ratio of the measured vertical to horizontal emittance is 0.001.

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4 p.

Notes

INIS; OSTI as DE97004599

Source

  • EPAC `96: 5. European particle accelerator conference, Barcelona (Spain), 10-14 Jun 1996

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  • Other: DE97004599
  • Report No.: BNL--64141
  • Report No.: CONF-960621--36
  • Grant Number: AC02-76CH00016
  • Office of Scientific & Technical Information Report Number: 462886
  • Archival Resource Key: ark:/67531/metadc674140

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • Summer 1996

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  • July 25, 2015, 2:21 a.m.

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  • Nov. 6, 2015, 10:31 p.m.

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Safranek, J. & Stefan, P. M. Emittance measurement at the NSLS x-ray ring, article, Summer 1996; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc674140/: accessed December 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.