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@INPROCEEDINGS{Shabani:1017360,
author = {Shabani, Doruntin and Rücker, Ulrich and Li, Jingjing and
Zakalek, Paul and Schmidt, Norberto and Langer, Christoph
and Gutberlet, Thomas and Brückel, Thomas},
title = {{I}nvestigation of the mutual influence of multiple
extraction channels for accelerator-based neutron sources},
reportid = {FZJ-2023-04070},
year = {2023},
abstract = {Compact accelerator-based neutron sources (CANS) are an
emerging technology that enables scientists to analyze the
dynamics and structure of matter. One of these projects is
the High Brilliance neutron Source (HBS) project, which aims
to tailor the neutron beams to meet requirements for
different instruments [1]. A key component in the
optimization process is the development of the
target-moderator-reflector (TMR) system, where the moderator
plays an important role in accumulation, moderating, and
emitting neutrons towards several instruments through
extraction channels. This study investigates the mutual
influences of several extraction channels on the neutron
flux and the beam divergence compared to a one extraction
channel system.To understand the production, moderation and
propagation of neutrons Monte Carlo particle-tracking codes,
such as MCNP and PHITS can be used. Simulations using the
PHITS program have first been performed for a single
extraction channel system to observe moderator design
effects on the beam divergence and the peak neutron flux
emitted towards the instrument. Lastly, several arrangements
of multiple extraction channels have been simulated to
investigate the influence of additional extraction channels
on the flux and the beam divergence.The results achieved in
this study show that the influence of multiple extraction
channels on the thermal neutron flux is minimal depending on
the amount of moderator material that is used and on the
arrangement of the channels. The insights gained from this
work contribute to the continuous development of the HBS
project and provide helpful information for the optimization
of such a neutron source and design of neutron extraction
channels in forthcoming neutron source facilities.[1] T.
Brückel, T. Gutberlet (Eds.), Conceptual Design Report –
Jülich High Brilliance Neutron Source (HBS), (2020)},
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/1017360},
}