Hugoniot and spall data from the laser-driven miniflyer

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Description

The laser-driven miniflyer has been developed as a small-sized complement to the propellant or gas-driven gun with which to make material property measurements. Flyer velocities typically range from 0.5 to 1.5 km/s, depending on the energy of the launching laser and the flyer dimensions. The 10--50 {micro}m-thick flyers, 1--3 mm in diameter, and comparably small targets require very little material and are easy to recover for post-experiment analysis. To measure and improve the precision of the measurements, the authors are conducting an extensive series of experiments impacting well-characterized Cu, Al, and Au on several transparent, calibrated, windows (PMMA, LiF, and ... continued below

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4 p.

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Warnes, R.H.; Paisley, D.L. & Tonks, D.L. September 1, 1995.

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Description

The laser-driven miniflyer has been developed as a small-sized complement to the propellant or gas-driven gun with which to make material property measurements. Flyer velocities typically range from 0.5 to 1.5 km/s, depending on the energy of the launching laser and the flyer dimensions. The 10--50 {micro}m-thick flyers, 1--3 mm in diameter, and comparably small targets require very little material and are easy to recover for post-experiment analysis. To measure and improve the precision of the measurements, the authors are conducting an extensive series of experiments impacting well-characterized Cu, Al, and Au on several transparent, calibrated, windows (PMMA, LiF, and sapphire). Measurement of the impact and interface velocities with a high-time-resolution velocity interferometer (VISAR) gives them a point on the Hugoniot of the flyer material. These are then compared to published Hugoniot data taken with conventional techniques. In the spall experiments, a flyer strikes a somewhat thicker target of the same material and creates a spall in the target. Measuring the free-surface velocity of the target gives information on the compressive elastic-plastic response of the target to the impact, the tensile spall strength, and the strain rate at which the spall occurred. Volumetric strain rates at spall in these experiments are frequently in the 10{sup 6}--10{sup 8} s{sup {minus}1} range, considerably higher than the 10{sup 3}--10{sup 4} s{sup {minus}1} range obtainable from gas gun experiments.

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4 p.

Notes

OSTI as DE95016980

Source

  • American Physical Society biennial conference on shock compression of condensed matter, Seattle, WA (United States), 13-18 Aug 1995

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  • Other: DE95016980
  • Report No.: LA-UR--95-2596
  • Report No.: CONF-950846--30
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 102235
  • Archival Resource Key: ark:/67531/metadc620763

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Creation Date

  • September 1, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Feb. 25, 2016, 7:18 p.m.

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Warnes, R.H.; Paisley, D.L. & Tonks, D.L. Hugoniot and spall data from the laser-driven miniflyer, report, September 1, 1995; New Mexico. (digital.library.unt.edu/ark:/67531/metadc620763/: accessed August 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.