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Article
Report number	arXiv:1501.05022
Title	The $\mu$TPC Method: Improving the Position Resolution of Neutron Detectors Based on MPGDs
Author(s)	Pfeiffer, D. (ESS, Lund ; CERN) ; Resnati, F. (ESS, Lund ; CERN) ; Birch, J. (Linkoping U.) ; Hall-Wilton, R. (ESS, Lund ; Mid Sweden U., Sundsvall) ; Höglund, C. (ESS, Lund ; Linkoping U.) ; Hultman, L. (Mid Sweden U., Sundsvall) ; Iakovidis, G. (CERN ; Brookhaven Natl. Lab.) ; Oliveri, E. (CERN) ; Oksanen, E. (ESS, Lund) ; Ropelewski, L. (CERN) ; Thuiner, P. (CERN ; Vienna U.)
Publication	2015-04-14
Imprint	20 Jan 2015
Number of pages	10
Note	Comments: 10 pages, 7 figures 10 pages, 7 figures
In:	JINST 10 (2015) P04004
DOI	10.1088/1748-0221/10/04/P04004
Subject category	Detectors and Experimental Techniques
Abstract	Due to the Helium-3 crisis, alternatives to the standard neutron detection techniques are becoming urgent. In addition, the instruments of the European Spallation Source (ESS) require advances in the state of the art of neutron detection. The instruments need detectors with excellent neutron detection efficiency, high-rate capabilities and unprecedented spatial resolution. The Macromolecular Crystallography instrument (NMX) requires a position resolution in the order of 200 um over a wide angular range of incoming neutrons. Solid converters in combination with Micro Pattern Gaseous Detectors (MPGDs) are proposed to meet the new requirements. Charged particles rising from the neutron capture have usually ranges larger than several millimetres in gas. This is apparently in contrast with the requirements for the position resolution. In this paper, we present an analysis technique, new in the field of neutron detection, based on the Time Projection Chamber (TPC) concept. Using a standard Single-GEM with the cathode coated with 10B4C, we extract the neutron interaction point with a resolution of better than sigma = 200 um.
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