New experimental capabilities and theoretical insights of high pressure compression waves

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Currently there are three platforms that offer quasi-isentropic compression or ramp-wave compression (RWC): light-gas gun, magnetic flux (Z-pinch), and laser. We focus here on the light-gas gun technique and on some current theoretical insights from experimental data. A gradient impedance through the length of the impactor provides the pressure pulse upon impactor to the subject material. Applications and results are given concerning high-pressure strength and liquid to solid, phase transition of water plus its associated phase fraction history. We also introduce the Korteweg-deVries-Burgers equation as a means to understand the evolution these RWC waves that propagate through the thickness of ... continued below

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Orlikowski, D; Nguyen, J; Patterson, J R; Minich, R; Martin, L P & Holmes, N July 20, 2007.

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Currently there are three platforms that offer quasi-isentropic compression or ramp-wave compression (RWC): light-gas gun, magnetic flux (Z-pinch), and laser. We focus here on the light-gas gun technique and on some current theoretical insights from experimental data. A gradient impedance through the length of the impactor provides the pressure pulse upon impactor to the subject material. Applications and results are given concerning high-pressure strength and liquid to solid, phase transition of water plus its associated phase fraction history. We also introduce the Korteweg-deVries-Burgers equation as a means to understand the evolution these RWC waves that propagate through the thickness of the subject material. This equation has the necessary competition between non-linear, dispersion, and dissipation processes, which is shown through observed structures that are manifested in the experimental particle velocity histories. Such methodology points towards a possible quantifiable dissipation, through which RWC experiments may be analyzed.

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PDF-file: 10 pages; size: 0.6 Mbytes

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  • Presented at: Shock Compression of Condensed Matter, Hilo, HI, United States, Jun 25 - Jun 29, 2007

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  • Report No.: UCRL-PROC-233023
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 921152
  • Archival Resource Key: ark:/67531/metadc900953

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  • July 20, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 30, 2016, 12:50 p.m.

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Orlikowski, D; Nguyen, J; Patterson, J R; Minich, R; Martin, L P & Holmes, N. New experimental capabilities and theoretical insights of high pressure compression waves, article, July 20, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc900953/: accessed October 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.