November 22, 2023
PSI Villigen
Europe/Zurich timezone

Study of Background Noise in High-Pressure Neutron Scattering Experiments

Nov 22, 2023, 3:45 PM
Auditorium (WHGA) (PSI Villigen)

Auditorium (WHGA)

PSI Villigen


Zhanwen Ma (PSI - Paul Scherrer Institut)


Advanced high-pressure neutron scattering experiments demand a high neutron flux and precise phase space at small sample volumes, while maintaining a high signal-to-noise ratio. This work is dedicated to a comprehensive evaluation of background noise in high-pressure neutron scattering experiments, employing simulations and benchmark experiments. McStas 3.2 with the Union component is used to simulate the sources of background noise and its effects on high-pressure experiments. Validation experiments are conducted at the CAMEA (Cold Neutron Triple-Axis Spectrometer) at SINQ (Swiss Spallation Neutron Source), utilizing Ho2Ti2O7 powder samples placed in a 5 mm diameter × 19 mm height container. The container is then housed within a CuBe clamp cell, which is subsequently placed in orange cryostats. Simulations and tests are compared to understand the sources of background noise and assess its impact on high-pressure experiments. Furthermore, the potential solutions to reduce background noise from pressure cells are discussed.

Primary author

Zhanwen Ma (PSI - Paul Scherrer Institut)


Daniel Gabriel Mazzone (PSI - Paul Scherrer Institut) Jakob Lass (PSI - Paul Scherrer Institut) Gediminas Simutis (PSI - Paul Scherrer Institut) Marek Bartkowiak (Paul Scherrer Institut) Dr Mads Bertelsen (3. European Spallation Source ERIC) Peter Willendrup (Technical University of Denmark, Physics Department) Uwe Filges (PSI - Paul Scherrer Institut) Christine Klauser (PSI - Paul Scherrer Institut)

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