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@INPROCEEDINGS{Schmidt:1017357,
author = {Schmidt, Norberto and Shabani, Doruntin and Li, Jingjing
and Dawidowski, Javier and Mauerhofer, Eric and Gutberlet,
Thomas and Brückel, Thomas},
title = {{D}evelopment of an {E}pithermal and {F}ast {N}eutrons},
reportid = {FZJ-2023-04067},
year = {2023},
abstract = {The High Brilliance Neutron Source (HBS) project aims to
develop a High-Current Accelerator-driven Neutron Source
(HiCANS) for neutron scattering, analytics, and imaging.
Fast neutrons with an average energy of 0.5 MeV will be
generated by the interaction of 70 MeV, 100 mA proton beam
with a tantalum target. Three target-moderator-reflector
(TMR) stations will operate at different frequencies to
deliver individually tailored beam characteristics for each
instrument. For the low (24 Hz, 667 us) and medium (96 Hz,
167 us) frequency stations, the neutrons will be slowed down
into the thermal and cold energy regimes, respectively, by
corresponding moderator systems. In addition, a
high-frequency mode can be adopted for a short pulse (~4-8
us) in one of the medium-frequency stations using an
appropriate chopper system.For this last case, it is desired
to have an optimal epithermal and fast neutron flux, in
order to carry out different experiments such as prompt
gamma analysis based on inelastic neutron scattering
(PGAINS), and resonance neutron imaging (RNI). These
instruments will be well-suited for preservation of cultural
heritage, characterization of archaeological objects,
materials science, and study of large and dense objects such
as batteries or aeronautical components.Some of the most
essential neutronic parameters for this kind of experiments
are the integral epithermal neutron flux, the ratio over
integral fast neutron flux, and the energy versus time
neutron distribution. For the optimization of these
different parameters, simulations with the PHITS Monte Carlo
code were performed.The objective of this work is the
presentation of the conceptual design of an epithermal and
fast neutron TMR unit for the HBS project, considering the
choice of the coolant, moderator, and reflector materials.},
month = {Oct},
date = {2023-10-16},
organization = {10th Annual Meeting of the Union for
Compact Accelerator-driven Neutron
Sources, Budapest (Hungary), 16 Oct
2023 - 19 Oct 2023},
subtyp = {Invited},
cin = {JCNS-2 / PGI-4 / JCNS-HBS / JARA-FIT},
cid = {I:(DE-Juel1)JCNS-2-20110106 / I:(DE-Juel1)PGI-4-20110106 /
I:(DE-Juel1)JCNS-HBS-20180709 / $I:(DE-82)080009_20140620$},
pnm = {632 - Materials – Quantum, Complex and Functional
Materials (POF4-632) / 6G4 - Jülich Centre for Neutron
Research (JCNS) (FZJ) (POF4-6G4)},
pid = {G:(DE-HGF)POF4-632 / G:(DE-HGF)POF4-6G4},
typ = {PUB:(DE-HGF)24},
url = {https://juser.fz-juelich.de/record/1017357},
}