Edinburgh Research Explorer

Investigations into rapid uniaxial compression of polycrystalline targets using femtosecond X-ray diffraction

Research output: Chapter in Book/Report/Conference proceedingConference contribution

  • David McGonegle
  • Andrew Higginbotham
  • Eric Galtier
  • Emma E. McBride
  • Malcolm I. McMahon
  • Despina Milathianaki
  • Hae Ja Lee
  • Bob Nagler
  • Sam M. Vinko
  • Justin S. Wark

Related Edinburgh Organisations

Original languageEnglish
Title of host publication18TH APS-SCCM AND 24TH AIRAPT, PTS 1-19
EditorsW Buttler, M Furlanetto, W Evans
Place of PublicationBRISTOL
PublisherIOP Publishing Ltd.
Number of pages6
DOIs
Publication statusPublished - 2014
Event18th Joint Int Conf of the APS Topical-Grp on Shock Compress of Condensed Matter / 24th Int Conf of the Int-Assoc-for-the-Advancement-of-High-Pressure-Sci-and-Technol - Seattle, United Kingdom
Duration: 7 Jul 201312 Jul 2013

Publication series

NameJournal of Physics Conference Series
PublisherIOP PUBLISHING LTD
Volume500
ISSN (Print)1742-6588

Conference

Conference18th Joint Int Conf of the APS Topical-Grp on Shock Compress of Condensed Matter / 24th Int Conf of the Int-Assoc-for-the-Advancement-of-High-Pressure-Sci-and-Technol
CountryUnited Kingdom
Period7/07/1312/07/13

Abstract

Although the pressures achievable in laser experiments continue to increase, the mechanisms underlying how solids deform at high strain rates are still not well understood. In particular, at higher pressures, the assumption that the difference between the longitudinal and transverse strains in a sample remains small becomes increasingly invalid. In recent years, there has been an increasing interest in simulating compression experiments on a granular level. In situ X-ray diffraction, where a target is probed with X-rays while a shock is propagating through it, is an excellent tool to test these simulations. We present data from the first long-pulse laser experiment at the MEC instrument of LCLS, the world's first hard X-ray Free Electron Laser, demonstrating large strain anisotropies. From this we infer shear stresses in polycrystalline copper of up to 1.75 GPa at a shock pressure of 32 GPa.

    Research areas

  • STRESS, STRENGTH, METALS

ID: 17529114