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Evolution in boron-based GEM detectors for diffraction measurements: From planar to 3D converters
Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy.
Istituto di Fisica Del Plasma (IFP-CNR), Via Cozzi 53, Milano, Italy.
Dipartimento di Fisica, Universitá degli Studi di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy; INFN Sezione di Milano-Bicocca, Piazza della Scienza 3, Milano, Italy.
Istituto di Fisica Del Plasma (IFP-CNR), Via Cozzi 53, Milano, Italy.
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2016 (English)In: Measurement science and technology, ISSN 0957-0233, E-ISSN 1361-6501, Vol. 27, no 11, article id 115902Article in journal (Refereed) Published
Abstract [en]

The so-called '3He-crisis' has motivated the neutron detector community to undertake an intense R&D programme in order to develop technologies alternative to standard 3He tubes and suitable for neutron detection systems in future spallation sources such as the European spallation source (ESS). Boron-based GEM (gas electron multiplier) detectors are a promising '3He-free' technology for thermal neutron detection in neutron scattering experiments. In this paper the evolution of boron-based GEM detectors from planar to 3D converters with an application in diffraction measurements is presented. The use of 3D converters coupled with GEMs allows for an optimization of the detector performances. Three different detectors were used for diffraction measurements on the INES instrument at the ISIS spallation source. The performances of the GEM-detectors are compared with those of conventional 3He tubes installed on the INES instrument. The conceptual detector with the 3D converter used in this paper reached a count rate per unit area of about 25% relative to the currently installed 3He tube. Its timing resolution is similar and the signal-to-background ratio (S/B) is 2 times lower.

Place, publisher, year, edition, pages
2016. Vol. 27, no 11, article id 115902
Keywords [en]
diffraction detector, GEM technology, helium3-free detector, neutron detector
National Category
Natural Sciences
Identifiers
URN: urn:nbn:se:miun:diva-29171DOI: 10.1088/0957-0233/27/11/115902ISI: 000386040500001Scopus ID: 2-s2.0-84991577876Local ID: STCOAI: oai:DiVA.org:miun-29171DiVA, id: diva2:1040953
Available from: 2016-10-31 Created: 2016-10-31 Last updated: 2017-07-04Bibliographically approved

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Hall-Wilton, Richard J.

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