TY - JOUR
T1 - Sourcing and reducing sample environment background in low-temperature high-pressure neutron scattering experiments
AU - Ma, Zhanwen
AU - Lass, Jakob
AU - Mazzone, Daniel
AU - Simutis, Gediminas
AU - Thürsam, Sascha
AU - Fennell, Tom
AU - Pomjakushina, Ekaterina
AU - Bartkowiak, Marek
AU - Nikitin, Stanislav
AU - Bertelsen, Mads
AU - Willendrup, Peter
AU - Filges, Uwe
AU - Klauser, Christine
N1 - Publisher Copyright:
© 2024 The Authors
PY - 2024
Y1 - 2024
N2 - Neutron scattering in high-pressure environments offers unique opportunities to measure the physical properties of matter but faces challenges due to low signal intensity and high background noise. In this study, Monte Carlo simulations were employed to identify background sources in low-temperature and high-pressure sample environments at the SINQ instrument CAMEA. Simulation results suggest that the piston pressure cell (PC) contributes significantly to the background noise in neutron scattering experiments. To counter this background, a compact radial neutron collimator was developed to reduce background in the sample environment, and its performance was evaluated experimentally. Measurements show that the collimator reduces the background generated by the PC effectively, especially for low q. Noise from the collimator was observed, and strategies to address this issue were discussed.
AB - Neutron scattering in high-pressure environments offers unique opportunities to measure the physical properties of matter but faces challenges due to low signal intensity and high background noise. In this study, Monte Carlo simulations were employed to identify background sources in low-temperature and high-pressure sample environments at the SINQ instrument CAMEA. Simulation results suggest that the piston pressure cell (PC) contributes significantly to the background noise in neutron scattering experiments. To counter this background, a compact radial neutron collimator was developed to reduce background in the sample environment, and its performance was evaluated experimentally. Measurements show that the collimator reduces the background generated by the PC effectively, especially for low q. Noise from the collimator was observed, and strategies to address this issue were discussed.
U2 - 10.1016/j.nima.2024.169634
DO - 10.1016/j.nima.2024.169634
M3 - Journal article
AN - SCOPUS:85198909552
SN - 0168-9002
VL - 1066
JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
M1 - 169634
ER -