High-Resolution Neutron Counting Sensor in Strain Mapping Through Transmission Bragg Edge Diffraction

Research output: Contribution to journalArticle

Abstract

High-resolution neutron counting sensors with microchannel plates coupled to a Timepix readout enable high spatial (similar to 55 mu m) and temporal (similar to 1 mu s) accuracy for each detected thermal and cold neutron. One of the attractive applications for those sensors is the high-resolution strain mapping in engineering samples through transmission Bragg edge diffraction. The unique combination of high detection efficiency (up to 70%), high spatial and temporal resolution of, detectors enable similar to 100 mu m strain mapping with similar to 100 mu strain accuracy. We present the results of proof of principle measurements performed at ROTAX beamline at ISIS spallation neutron source. Strain map of a bent steel sample is measured with very high spatial resolution. The same sensors enable high-resolution nondestructive studies in such diverse areas as neutron microtomography, dynamics of fuel injection, material composition, archaeology, water propagation and many others.

Details

Authors
  • A. S. Tremsin
  • J. B. McPhate
  • J. V. Vallerga
  • O. H. W. Siegmund
  • W. Kockelmann
  • Axel Steuwer
  • W. B. Feller
Organisations
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Natural Sciences
  • Physical Sciences

Keywords

  • Crystal microstructure, elasticity, imaging, instrumentation and, measurement, ionizing radiation sensors, position sensitive particle, detectors, radiography, reconstruction algorithms
Original languageEnglish
Pages (from-to)3433-3436
JournalIEEE Sensors Journal
Volume11
Issue number12
StatePublished - 2011
Peer-reviewedYes