High-pressure developments for resonant X-ray scattering experiments at I16.
J Synchrotron Radiat
; 27(Pt 2): 351-359, 2020 Mar 01.
Article
em En
| MEDLINE
| ID: mdl-32153273
ABSTRACT
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 inâ
situ 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 4â
K 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 20-21â
mm and fits into a 57â
mm diameter. This system allows different materials to be probed using RXS in a range of temperatures between 30 and 300â
K and has been tested up to 20â
GPa using anvils with a culet diameter of 500â
µm 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.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article