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

Summary, in English

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.

• Author: A. S. Tremsin; J. B. McPhate; J. V. Vallerga; O. H. W. Siegmund; W. Kockelmann; Axel Steuwer; W. B. Feller
• Department/s: European Spallation Source ESS AB
• Publishing year: 2011
• Language: English
• Pages: 3433-3436
• Publication/Series: IEEE Sensors Journal
• Volume: 11
• Issue: 12
• Links: http://dx.doi.org/10.1109/JSEN.2011.2160339
• Document type: Journal article
• Publisher: IEEE - Institute of Electrical and Electronics Engineers Inc.
• Topic: Natural Sciences; Physical Sciences
• Keywords: Crystal microstructure; elasticity; imaging; instrumentation and; measurement; ionizing radiation sensors; position sensitive particle; detectors; radiography; reconstruction algorithms
• Status: Published
• ISBN/ISSN/Other: ISSN: 1558-1748