A low-background piston-cylinder-type hybrid high pressure cell for muon-spin rotation/relaxation experiments

Z. Shermadini*, R. Khasanov, M. Elender, G. Simutis, Z. Guguchia, K. V. Kamenev, A. Amato

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A low background double-wall piston-cylinder-type pressure cell is developed at the Paul Scherrer Institute. The cell is made from BERYLCO-25 (beryllium copper) and MP35N nonmagnetic alloys with the design and dimensions which are specifically adapted to muon-spin rotation/relaxation (SR) measurements. The mechanical design and performance of the pressure cell are evaluated using finite-element analysis (FEA). By including the measured stress-strain characteristics of the materials into the finite-element model, the cell dimensions are optimized with the aim to reach the highest possible pressure while maintaining the sample space large (6mm in diameter and 12mm high). The presented unconventional design of the double-wall piston-cylinder pressure cell with a harder outer MP35N sleeve and a softer inner CuBe cylinder enables pressures of up to 2.6 GPa to be reached at ambient temperature, corresponding to 2.2 GPa at low temperatures without any irreversible damage to the pressure cell. The nature of the muon stopping distribution, mainly in the sample and in the CuBe cylinder, results in a low-background SR signal.

Original languageEnglish
Pages (from-to)449-464
Number of pages16
JournalHigh Pressure Research
Volume37
Issue number4
Early online date11 Sep 2017
DOIs
Publication statusE-pub ahead of print - 11 Sep 2017

Keywords

  • Muon-spin rotation
  • relaxation
  • finite-element analysis
  • piston-cylinder pressure cell
  • superconductivity
  • magnetism
  • SLOW POLARIZED MUONS
  • MAGNETIC MEASUREMENTS
  • SUPERCONDUCTIVITY
  • DEPENDENCE
  • RB3C60
  • CRAS

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