A new beamstop for microfocus X-ray capillary beams

Ulrich Englich, Peter Revesz, William Miller

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


In order to accurately measure the photon flux and to assist in aligning the beam, we have designed a modified beamstop device based on a photo diode integrated with the beamstop. The beamstop contains a small CdWO4 crystal that completely stops the X-rays and at the same time produces photoluminescence proportional to the X-ray flux. The light is then guided to a photosensitive diode using a flexible light pipe to monitor the flux. With this device we achieve the goal of stopping the primary X-ray beam and simultaneously monitoring the X-ray intensity, thus eliminating the need for integrating ion-chambers into the capillary or collimator mount.

Original languageEnglish (US)
Pages (from-to)101-103
Number of pages3
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
StatePublished - Sep 1 2011


  • Beamstop
  • Microbeam
  • Synchrotron radiation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation


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