The Multi-Blade Boron-10-based neutron detector for high intensity neutron reflectometry at ESS

F Piscitelli,E Dian,J Orban,M Anastasopoulos,T Zsiros,S Schmidt,J Fuzi,T Bryś,P Pazmandi,F Messi,L Robinson,R Hall-Wilton,C Höglund,L Rosta,F Chicken,G Kiss,D Varga

doi:10.1088/1748-0221/12/03/p03013

Abstract

The Multi-Blade is a Boron-10-based gaseous detector introduced to face the challenge arising in neutron reflectometry at pulsed neutron sources. Neutron reflectometers are the most challenging instruments in terms of instantaneous counting rate and spatial resolution. This detector has been designed to cope with the requirements set for the reflectometers at the upcoming European Spallation Source (ESS) in Sweden. Based on previous results obtained at the Institut Laue-Langevin (ILL) in France, an improved demonstrator has been built at ESS and tested at the Budapest Neutron Centre (BNC) in Hungary and at the Source Testing Facility (STF) at the Lund University in Sweden. A detailed description of the detector and the results of the tests are discussed in this manuscript.

Highlights

- Investigation of gamma-ray sensitivity of neutron detectors based on thin converter films A Khaplanov, F Piscitelli, J -C Buffet et al
Based on previous results obtained at the Institut Laue-Langevin (ILL) in France, an improved demonstrator has been built at European Spallation Source (ESS) and tested at the Budapest Neutron
When a neutron is converted in the 10B4C-layer, the capture reaction fragments can escape the layer with any orientation and due to the random energy loss, the deposited charge in the gas volume ranges from zero to the full energy carried by the particle

Summary

Introduction

- Investigation of gamma-ray sensitivity of neutron detectors based on thin converter films A Khaplanov, F Piscitelli, J -C Buffet et al. - A large high-efficiency multi-layered Micromegas thermal neutron detector G. - Multi-Grid detector for neutron spectroscopy: results obtained on time-offlight spectrometer CNCS M. : The Multi-Blade is a Boron-10-based gaseous detector introduced to face the challenge arising in neutron reflectometry at pulsed neutron sources. Neutron reflectometers are the most challenging instruments in terms of instantaneous counting rate and spatial resolution. This detector has been designed to cope with the requirements set for the reflectometers at the upcoming European. Based on previous results obtained at the Institut Laue-Langevin (ILL) in France, an improved demonstrator has been built at ESS and tested at the Budapest Neutron

Methods

Results

Conclusion