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Title: Powder diffraction from solids in the terapascal regime

Abstract

A method of obtaining powder diffraction data on dynamically compressed solids has been implemented at the Jupiter and OMEGA laser facilities. Thin powdered samples are sandwiched between diamond plates and ramp compressed in the solid phase using a gradual increase in the drive-laser intensity. The pressure history in the sample is determined by back-propagation of the measured diamond free-surface velocity. A pulse of x rays is produced at the time of peak pressure by laser illumination of a thin Cu or Fe foil and collimated at the sample plane by a pinhole cut in a Ta substrate. The diffracted signal is recorded on x-ray sensitive material, with a typical d-spacing uncertainty of {approx}0.01 A. This diagnostic has been used up to 0.9 TPa (9 Mbar) to verify the solidity, measure the density, constrain the crystal structure, and evaluate the strain-induced texturing of a variety of compressed samples spanning atomic numbers from 6 (carbon) to 82 (lead). Further refinement of the technique will soon enable diffraction measurements in solid samples at pressures exceeding 1 TPa.

Authors:
; ; ; ; ; ; ; ;  [1]; ;  [2]
  1. Lawrence Livermore National Laboratory, Livermore, California 94551 (United States)
  2. Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14623 (United States)
Publication Date:
OSTI Identifier:
22093990
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 83; Journal Issue: 11; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BEAMS; COLLIMATORS; CRYSTAL STRUCTURE; DENSITY; FOILS; ILLUMINANCE; LASER RADIATION; POWDERS; PRESSURE MEASUREMENT; PRESSURE RANGE GIGA PA; PULSES; SOLIDS; STRAINS; SUBSTRATES; SURFACES; VELOCITY; X RADIATION; X-RAY DIFFRACTION

Citation Formats

Rygg, J. R., Eggert, J. H., Lazicki, A. E., Coppari, F., Hawreliak, J. A., Hicks, D. G., Smith, R. F., Uphaus, T. M., Collins, G. W., Sorce, C. M., and Yaakobi, B. Powder diffraction from solids in the terapascal regime. United States: N. p., 2012. Web. doi:10.1063/1.4766464.
Rygg, J. R., Eggert, J. H., Lazicki, A. E., Coppari, F., Hawreliak, J. A., Hicks, D. G., Smith, R. F., Uphaus, T. M., Collins, G. W., Sorce, C. M., & Yaakobi, B. Powder diffraction from solids in the terapascal regime. United States. doi:10.1063/1.4766464.
Rygg, J. R., Eggert, J. H., Lazicki, A. E., Coppari, F., Hawreliak, J. A., Hicks, D. G., Smith, R. F., Uphaus, T. M., Collins, G. W., Sorce, C. M., and Yaakobi, B. Thu . "Powder diffraction from solids in the terapascal regime". United States. doi:10.1063/1.4766464.
@article{osti_22093990,
title = {Powder diffraction from solids in the terapascal regime},
author = {Rygg, J. R. and Eggert, J. H. and Lazicki, A. E. and Coppari, F. and Hawreliak, J. A. and Hicks, D. G. and Smith, R. F. and Uphaus, T. M. and Collins, G. W. and Sorce, C. M. and Yaakobi, B.},
abstractNote = {A method of obtaining powder diffraction data on dynamically compressed solids has been implemented at the Jupiter and OMEGA laser facilities. Thin powdered samples are sandwiched between diamond plates and ramp compressed in the solid phase using a gradual increase in the drive-laser intensity. The pressure history in the sample is determined by back-propagation of the measured diamond free-surface velocity. A pulse of x rays is produced at the time of peak pressure by laser illumination of a thin Cu or Fe foil and collimated at the sample plane by a pinhole cut in a Ta substrate. The diffracted signal is recorded on x-ray sensitive material, with a typical d-spacing uncertainty of {approx}0.01 A. This diagnostic has been used up to 0.9 TPa (9 Mbar) to verify the solidity, measure the density, constrain the crystal structure, and evaluate the strain-induced texturing of a variety of compressed samples spanning atomic numbers from 6 (carbon) to 82 (lead). Further refinement of the technique will soon enable diffraction measurements in solid samples at pressures exceeding 1 TPa.},
doi = {10.1063/1.4766464},
journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 11,
volume = 83,
place = {United States},
year = {2012},
month = {11}
}