Blast wave diagnostic for the petawatt laser system

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We report on a diagnostic to measure the trajectory of a blast wave propagating through a plastic target 400 {micro}m thick. This blast wave is generated by the irradiation of the front surface of the target with {approximately} 400 J of 1 {micro}m laser radiation in a 20 ps pulse focused to a {approximately} 50 {micro}m diameter spot, which produces an intensity in excess of 1O{sup 18} W/cm{sup 2}. These conditions approximate a point explosion and a blast wave is predicted to be generated with an initial pressure nearing 1 Gbar which decays as it travels approximately radially outward from ... continued below

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18 p.

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Budil, K. S., LLNL June 3, 1998.

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Description

We report on a diagnostic to measure the trajectory of a blast wave propagating through a plastic target 400 {micro}m thick. This blast wave is generated by the irradiation of the front surface of the target with {approximately} 400 J of 1 {micro}m laser radiation in a 20 ps pulse focused to a {approximately} 50 {micro}m diameter spot, which produces an intensity in excess of 1O{sup 18} W/cm{sup 2}. These conditions approximate a point explosion and a blast wave is predicted to be generated with an initial pressure nearing 1 Gbar which decays as it travels approximately radially outward from the interaction region We have utilized streaked optical pyrometry of the blast front to determine its time of arrival at the rear surface of the target Applications of a self-similar Taylor-Sedov blast wave solution allows the amount of energy deposited to be estimated The experiment, LASNEX design simulations and initial results are discussed.

Physical Description

18 p.

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OSTI as DE98058593

Other: FDE: PDF; PL:

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  • 12. topical conference on high-temperature plasma diagnostics, Princeton, NJ (United States), 7-11 Jun 1998

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  • Other: DE98058593
  • Report No.: UCRL-JC--130955
  • Report No.: CONF-980605--
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 292442
  • Archival Resource Key: ark:/67531/metadc676815

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  • June 3, 1998

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  • July 25, 2015, 2:20 a.m.

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  • April 10, 2017, 2:12 p.m.

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Budil, K. S., LLNL. Blast wave diagnostic for the petawatt laser system, article, June 3, 1998; California. (digital.library.unt.edu/ark:/67531/metadc676815/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.