High-pressure cell for simultaneous dielectric and neutron spectroscopy

Alejandro Sanz, Henriette Wase Hansen, Bo Jakobsen, Ib Høst Pedersen, Simone Capaccioli, Karolina Adrjanowicz, Marian Paluch, Julien Gonthier, Bernhard Frick, Eddy Lelièvre-Berna, Judith Peters, Kristine Niss

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Abstract

In this article, we report on the design, manufacture, and testing of a high-pressure cell for simultaneous dielectric and neutron spectroscopy. This cell is a unique tool for studying dynamics on different time scales, from kilo- to picoseconds, covering universal features such as the α relaxation and fast vibrations at the same time. The cell, constructed in cylindrical geometry, is made of a high-strength aluminum alloy and operates up to 500 MPa in a temperature range between roughly 2 and 320 K. In order to measure the scattered neutron intensity and the sample capacitance simultaneously, a cylindrical capacitor is positioned within the bore of the high-pressure container. The capacitor consists of two concentric electrodes separated by insulating spacers. The performance of this setup has been successfully verified by collecting simultaneous dielectric and neutron spectroscopy data on dipropylene glycol, using both backscattering and time-of-flight instruments. We have carried out the experiments at different combinations of temperature and pressure in both the supercooled liquid and glassy state.
Original languageEnglish
Article number023904
JournalReview of Scientific Instruments
Volume89
Issue number2
Number of pages9
ISSN0034-6748
DOIs
Publication statusPublished - 2018

Cite this

Sanz, A., Hansen, H. W., Jakobsen, B., Pedersen, I. H., Capaccioli, S., Adrjanowicz, K., Paluch, M., Gonthier, J., Frick, B., Lelièvre-Berna, E., Peters, J., & Niss, K. (2018). High-pressure cell for simultaneous dielectric and neutron spectroscopy. Review of Scientific Instruments, 89(2), [023904]. https://doi.org/10.1063/1.5007021