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Imaging high energy photons with PILATUS II at the tagged photon beam at MAX-lab

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Author

  • V. Lee
  • D. J. Peake
  • B. Sobott
  • Bent Schröder
  • Ch. Broennimann
  • B. Henrich
  • Kurt Hansen
  • G. J. O'Keefe
  • G. N. Taylor
  • M. J. Boland
  • M. N. Thompson
  • R. P. Rassool
Show all

Summary, in English

In photonuclear experiments precise location of the photon beam relative to the experimental sample is critical. Previously used techniques such as using photographic film to identify the position, intensity and centroid of the beam is time-consuming and a faster method is required. PILATUS is a single-photon-counting pixel detector developed at the Paul Scherrer Institute (PSI), Switzerland. It is a silicon-based, two-dimensional detector with a large dynamic range and zero readout noise. Designed as an X-ray detector, its optimal quantum efficiency is between 3 and 30 keV. This paper reports measurements carried out at the MAX-lab tagged photon facility in Lund, Sweden. The beam endpoint energy of approximately 200 MeV is far above the designed optimal energy detection range of PILATUS, and provides a critical test of the use of PILATUS under high energy conditions. The detector was placed in the photon beam and images were taken both downstream of other experiments, and in close range of a 19 mm collimator. The successful measurements demonstrate the versatility and robustness of the detector and provide an effective way of quickly and accurately monitoring beam position and profile in real time. (C) 2009 Elsevier B.V. All rights reserved.

Department/s

Publishing year

2009

Language

English

Pages

379-383

Publication/Series

Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment

Volume

603

Issue

3

Document type

Journal article

Publisher

Elsevier

Topic

  • Accelerator Physics and Instrumentation

Keywords

  • MAX-lab
  • PILATUS
  • pixel
  • photon beam monitor
  • Beam
  • X-ray detector
  • diagnostics
  • Photon tagging
  • Single photon counting
  • monitor
  • Beam profile

Status

Published

ISBN/ISSN/Other

  • ISSN: 0167-5087