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Silicon sensors with pyramidal structures for neutron imaging
KTH.
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2014 (English)In: Journal of Instrumentation, ISSN 1748-0221, E-ISSN 1748-0221, Vol. 9, C04011- p.Article in journal (Refereed) Published
Abstract [en]

Neutron detection is a valuable tool in nuclear science research, homeland security, quality assurance in nuclear plants and medical applications. Recent developments and near future instrumentations in neutron imaging have a need for sensors with high spatial resolution, dynamic range, sensitivity and background discrimination. Silicon based neutron detectors can potentially fulfil these requirements. In this work, pad and pixel detectors with pyramidal micro-structures have been successfully fabricated that should have an improved detection efficiency when compared to conventional planar devices. Titanium di-boride (TiB2) and lithium fluoride (LiF) were deposited as the neutron converters. Excellent electrical performances were measured on both simple pad and pixel detectors. A selection of pad detectors was examined by alpha spectroscopy. Measurement with thermal neutrons from a 241Am-Be source shows an improvement in relative efficiency of up to 38% when compared to conventional planar devices.

Place, publisher, year, edition, pages
2014. Vol. 9, C04011- p.
Keyword [en]
Neutron radiography, X-ray detectors, Si microstrip and pad detectors, Solid state detectors
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:kth:diva-147064DOI: 10.1088/1748-0221/9/04/C04011ISI: 000336123800011OAI: oai:DiVA.org:kth-147064DiVA: diva2:728933
Conference
15th International Workshop on Radiation Imaging Detectors, June 23-27, 2013, Paris, France
Note

QC 20140625

Available from: 2014-06-25 Created: 2014-06-23 Last updated: 2017-12-05Bibliographically approved

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