Sourcing and reducing sample environment background in low-temperature high-pressure neutron scattering experiments

被引：0

作者：

Ma, Zhanwen ^{[1
]}

Lass, Jakob ^{[1
]}

Mazzone, Daniel ^{[1
]}

Simutis, Gediminas ^{[1
]}

Thursam, Sascha ^{[1
]}

Fennell, Tom ^{[1
]}

Pomjakushina, Ekaterina ^{[1
]}

Bartkowiak, Marek ^{[1
]}

Nikitin, Stanislav ^{[1
]}

Bertelsen, Mads ^{[2
]}

Willendrup, Peter ^{[2
,3
,4
]}

Filges, Uwe ^{[1
]}

Klauser, Christine ^{[1
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

[2] European Spallat Source ERIC, Data Management & Software Ctr, Asmussens Alle 305, DK-2800 Lyngby, Denmark

[3] European Spallat Source ERIC, POB 176, Lund, Sweden

[4] Tech Univ Denmark, DK-2800 Lyngby, Denmark

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 2024年 / 1066卷

关键词：

RADIAL COLLIMATOR;

D O I：

10.1016/j.nima.2024.169634

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

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.

引用

页数：8

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