Hot surface ionic line emission and cold K-inner shell emission from petawatt-laser irradiated Cu foil targets

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A hot, T{sub e} {approx} 2- to 3-keV surface plasma was observed in the interaction of a 0.7-ps petawatt laser beam with solid copper-foil targets at intensities >10{sup 20} W/cm{sup 2}. Copper K-shell spectra were measured in the range of 8 to 9 keV using a single-photon-counting x-ray CCD camera. In addition to K{sub {alpha}} and K{sub {beta}} inner-shell lines, the emission contained the Cu He{sub {alpha}} and Ly{sub {alpha}} lines, allowing the temperature to be inferred. These lines have not been observed previously with ultrafast laser pulses. For intensities less than 3 x 10{sup 18} W/cm{sup 2}, only the ... continued below

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Theobald, W; Akli, K; Clarke, R; Delettrez, J A; Freeman, R R; Glenzer, S et al. December 13, 2005.

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A hot, T{sub e} {approx} 2- to 3-keV surface plasma was observed in the interaction of a 0.7-ps petawatt laser beam with solid copper-foil targets at intensities >10{sup 20} W/cm{sup 2}. Copper K-shell spectra were measured in the range of 8 to 9 keV using a single-photon-counting x-ray CCD camera. In addition to K{sub {alpha}} and K{sub {beta}} inner-shell lines, the emission contained the Cu He{sub {alpha}} and Ly{sub {alpha}} lines, allowing the temperature to be inferred. These lines have not been observed previously with ultrafast laser pulses. For intensities less than 3 x 10{sup 18} W/cm{sup 2}, only the K{sub {alpha}} and K{sub {beta}} inner-shell emissions are detected. Measurements of the absolute K{sub {alpha}} yield as a function of the laser intensity are in agreement with a model that includes refluxing and confinement of the suprathermal electrons in the target volume.

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PDF-file: 49 pages; size: 0.5 Mbytes

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  • Journal Name: Physics of Plasmas, vol. 13, N/A, April 18, 2006, pp. 043102

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  • Report No.: UCRL-JRNL-217895
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 898034
  • Archival Resource Key: ark:/67531/metadc888001

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  • December 13, 2005

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  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 7:52 p.m.

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Theobald, W; Akli, K; Clarke, R; Delettrez, J A; Freeman, R R; Glenzer, S et al. Hot surface ionic line emission and cold K-inner shell emission from petawatt-laser irradiated Cu foil targets, article, December 13, 2005; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc888001/: accessed October 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.