Investigation of neutron scattering in the Multi-Blade detector with Geant4 simulations

Abstract

The European Spallation Source (ESS) is the world's next generation spallation-based neutron source. The research conducted at ESS will yield in the discovery and development of new materials including the fields of manufacturing, pharmaceuticals, aerospace, engines, plastics, energy, telecommunications, transportation, information technology and biotechnology. The spallation source will deliver an unprecedented neutron flux. In particular, the reflectometers selected for construction, ESTIA and FREIA, have to fulfill challenging requirements. Local incident peak rate can reach 10${}^5$~Hz/mm${}^2$. For new science to be addressed, the spatial resolution is aimed to be less than 1 mm with a desired scattering of 10${}^{-4}$ (peak-to-tail ratio). The latter requirement is approximately two orders of magnitude better than the current state-of-the-art detectors. The main aim of this work is to quantify the cumulative contribution of various detector components to the scattering of neutrons and to prove that the respective effect is within the requirements set for the Multi-Blade detector by the ESS reflectometers. To this end, different sets of geometry and beam parameters are investigated, with primary focus on the cathode coating and the detector window thickness.

References in corpus (17)

• The Multi-Blade Boron-10-based Neutron Detector for high intensity Neutron Reflectometry at ESS
• Analytical modeling of thin film neutron converters and its application to thermal neutron gas detectors
• Multi-Grid Detector for Neutron Spectroscopy: Results Obtained on Time-of-Flight Spectrometer CNCS
• Fast neutron sensitivity of neutron detectors based on boron-10 converter layers
• Geant4 based simulations for novel neutron detector development
• Characterization of the Multi-Blade 10B-based detector at the CRISP reflectometer at ISIS for neutron reflectometry at ESS
• Scattered neutron background in thermal neutron detectors
• A 10B-based neutron detector with stacked Multiwire Proportional Counters and macrostructured cathodes
• Simulation Tools for Detector and Instrument Design
• Boron-10 layers, Neutron Reflectometry and Thermal Neutron Gaseous Detectors
• Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: Feasibility study in a thermal neutron beam
• Charge reconstruction study of the DAMPE Silicon-Tungsten Tracker with ion beams
• Neutron reflectometry with the Multi-Blade 10B-based detector
• Boron-10 lined RPCs for sub-millimeter resolution thermal neutron detectors: Conceptual design and performance considerations
• Cumulative Reports of the SoNDe Project July 2017
• Neutron reflectometry on highly absorbing films and its application to 10B4C-based neutron detectors
• DECal, a Python tool for the efficiency calculation of thermal neutron detectors based on thin-film converters

Cited by in corpus (4)

• NCrystal : a library for thermal neutron transport
• The Multi-Blade Boron-10-based neutron detector performance using a focusing reflectometer
• Performance evaluation of the Boron Coated Straws detector with Geant4
• Multi-Blade detector with VMM3a-ASIC-based readout: installation and commissioning at the reflectometer Amor at PSI