A high-efficiency thermal neutron detector based on thin 3D (B4C)-B-10 converters for high-rate applicationsShow others and affiliations
2018 (English)In: Europhysics letters, ISSN 0295-5075, E-ISSN 1286-4854, Vol. 123, no 5, article id 52001Article in journal (Refereed) Published
Abstract [en]
new position-sensitive thermal neutron detector based on boron-coated converters has been developed as an alternative to today's standard He-3-based technology for application to thermal neutron scattering. The key element of the development is a novel 3D (B4C)-B-10 converter which has been ad hoc designed and realized with the aim of combining a high neutron conversion probability via the B-10(n, alpha)(7) Li reaction together with an efficient collection of the produced charged particles. The developed 3D converter is composed of thin aluminium grids made by a micro-waterjet technique and coated on both sides with a thin layer of( 10)B(4)C. When coupled to a GEM detector this converter allows reaching neutron detection efficiencies close to 50% at neutron wavelengths equal to 4 angstrom. In addition, the new detector features a spatial resolution of about 5 min and can sustain counting rates well in excess of 1 MHz/cm(2). The newly developed neutron detector will enable time-resolved measurements of different kind of samples in neutron scattering experiments at high flux spallation sources and can find a use in applications where large areas and custom geometries of thermal neutron detectors are foreseen.
Place, publisher, year, edition, pages
2018. Vol. 123, no 5, article id 52001
National Category
Electrical Engineering, Electronic Engineering, Information Engineering Accelerator Physics and Instrumentation
Identifiers
URN: urn:nbn:se:miun:diva-34888DOI: 10.1209/0295-5075/123/52001ISI: 000446207300001Scopus ID: 2-s2.0-85054626431OAI: oai:DiVA.org:miun-34888DiVA, id: diva2:1263515
2018-11-152018-11-152022-03-31Bibliographically approved