Dec 8 – 10, 2020 Online only
Online event
Europe/Berlin timezone

Design study of a 1-m2 Position Sensitive Neutron Detector (PSND)

Dec 10, 2020, 2:45 PM
15m
Online event

Online event

Talk DN: Instrumentation DN2020: Instrumentation

Speaker

Dr Gregor Nowak (Helmholtz-Zentrum Geesthacht)

Description

Modern Multi-Wire-Proportional-Chambers (MWPC) operating with 10B4C films as solid-state-converter can surpass the performance of ones based on 3He in terms of position resolution and count rate capability at similar detection efficiency [1, 2]. The use of large area coated converters on thin foils forces to develop a mechanical concept to avoid deformations of the neutron sensitive surface due to their own weight and due to acting electrostatic resulting from HV in operation. This concept must allow a parallel stacking of the converter elements in mm distance in order to accumulate conversion efficiency as needed for perpendicular neutron incidence geometry. HZG has introduced [1] and investigated as a contribution to the ESS the idea of stabilizing the converter elements by gas pressure gradient between both sides of the converter to counteract the forces resulting from operation. This concept is applied to the design study of a 1-m2 PSND with a position resolution of 2 mm. The MWPC consists of up to 24x 10B4C coated 0.3 mm thick Aluminum parallel stacked converters with a detection depth < 12 mm each. The deposition method of 10B4C coatings with thicknesses up to 10 µm on pretreated Al substrates was elaborated [2, 3]. The delay-line read-out of the detector coupes for up to 170 kcps per detector plane.
[1] European Patent: EP 17184906.0 (filed at 04.08.2017)
[2] European Patent Application 2 997 174 (14.07.2014)
[3] G. Nowak, et al. J. Appl. Phys. 117, 034901 (2015)

Primary author

Dr Gregor Nowak (Helmholtz-Zentrum Geesthacht)

Co-authors

Mr Jörg Burmester (Helmholtz-Zentrum Geesthacht) Jörn Plewka (Helmholtz-Zentrum Geesthacht) Christian Jacobsen (Helmholtz-Zentrum Geesthacht) Carsten Gregersen (Helmholtz-Zentrum Geesthacht) Dr Felix Theopold (Helmholtz-Zentrum Geesthacht) Mr Wolfgang Puls (Helmholtz-Zentrum Geesthacht) Mr Andreas Beldowski (Helmholtz-Zentrum Geesthacht) Mr John Hedde (Helmholtz-Zentrum Geesthacht) Dr Irina Stefanescu (European Spallation Source ERIC (ESS)) Prof. Richard Hall-Wilton (European Spallation Source ERIC (ESS)) Dr Jochen Fenske (Helmholtz-Zentrum Geesthacht) Prof. Martin Müller (Helmholtz-Zentrum Geesthacht)

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