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@ARTICLE{Khli:824331,
author = {Köhli, M. and Allmendinger, F. and Häußler, W. and
Schröder, T. and Klein, M. and Meven, M. and Schmidt, U.},
title = {{E}fficiency and spatial resolution of the {CASCADE}
thermal neutron detector},
journal = {Nuclear instruments $\&$ methods in physics research / A},
volume = {828},
issn = {0168-9002},
address = {Amsterdam},
publisher = {North-Holland Publ. Co.},
reportid = {FZJ-2016-06940},
pages = {242 - 249},
year = {2016},
abstract = {We report on the CASCADE project – a detection system,
which has been designed for the purposes of neutron Spin
Echo spectroscopy and which is continuously further
developed and adapted to various applications. It features
2D spatially resolved detection of thermal neutrons at high
rates. The CASCADE detector is composed of a stack of solid
10B coated Gas Electron Multiplier foils, which serve both
as a neutron converter and as an amplifier for the primary
ionization deposited in the standard counting gas
environment. This multi-layer setup efficiently increases
the detection efficiency and by extracting the signal of the
charge traversing the stack the conversion layer can be
identified allowing a precise determination of the
time-of-flight. The spatial resolution is found by optical
contrast determination to be View the MathML
sourceσ=(1.39±0.05)mm and by divergence corrected aperture
measurements View the MathML sourceσ=(1.454±0.007)mm,
which is in agreement with the simulated detector model.
Furthermore this enabled to investigate and describe the
non-Gaussian resolution function. At the HEiDi
diffractometer the absolute detection efficiency has been
studied. At 0.6 Å for the 6 layer detector, which is
currently part of the RESEDA spectrometer, an efficiency of
$7.8\%$ has been measured, which by means of Monte Carlo
simulations translates to $(21.0±1.5)\%$ for thermal
neutrons at 1.8 Å and $(46.9±3.3)\%$ at 5.4 Å.},
cin = {JCNS (München) ; Jülich Centre for Neutron Science JCNS
(München) ; JCNS-FRM-II / JCNS-2},
ddc = {530},
cid = {I:(DE-Juel1)JCNS-FRM-II-20110218 /
I:(DE-Juel1)JCNS-2-20110106},
pnm = {6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623)
/ 6G15 - FRM II / MLZ (POF3-6G15)},
pid = {G:(DE-HGF)POF3-6G4 / G:(DE-HGF)POF3-6G15},
experiment = {EXP:(DE-MLZ)HEIDI-20140101 / EXP:(DE-MLZ)RESEDA-20140101},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000377399700029},
doi = {10.1016/j.nima.2016.05.014},
url = {https://juser.fz-juelich.de/record/824331},
}