High-pressure developments for resonant X-ray scattering experiments at I16

I. Povedano*, A. Bombardi, D. G. Porter, M. Burt, S. Green, K. V. Kamenev

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

An experimental setup to perform high-pressure resonant X-ray scattering (RXS) experiments at low temperature on I16 at Diamond Light Source is presented. The setup consists of a membrane-driven diamond anvil cell, a panoramic dome and an optical system that allows pressure to be measured insitu using the ruby fluorescence method. The membrane cell, inspired by the Merrill-Bassett design, presents an asymmetric layout in order to operate in a back-scattering geometry, with a panoramic aperture of 100° in the top and a bottom half dedicated to the regulation and measurement of pressure. It is specially designed to be mounted on the cold finger of a 4K closed-cycle cryostat and actuated at low-Temperature by pumping helium into the gas membrane. The main parts of the body are machined from a CuBe alloy (BERYLCO 25) and, when assembled, it presents an approximate height of 20-21mm and fits into a 57mm diameter. This system allows different materials to be probed using RXS in a range of temperatures between 30 and 300K and has been tested up to 20GPa using anvils with a culet diameter of 500μm under quasi-cryogenic conditions. Detailed descriptions of different parts of the setup, operation and the developed methodology are provided here, along with some preliminary experimental results.

Original languageEnglish
Pages (from-to)351-359
Number of pages9
JournalJournal of Synchrotron Radiation
Volume27
Issue number2
Early online date27 Feb 2020
DOIs
Publication statusPublished - 1 Mar 2020

Keywords / Materials (for Non-textual outputs)

  • DAC
  • high-pressure
  • instrumentation development
  • low temperature
  • resonant X-ray scattering

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