X-ray spectroscopy and imaging of a plasma collision

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The collision of laser-produced plasmas has been diagnosed by x-ray spectroscopy and imaging. The two colliding plasmas are produced on Al thin foils at a distance of 200 to 900 {mu}m irradiated at {lambda} = 0.53 {mu}m with laser intensities of 3 {times} 10{sup 13} to 6 {times} 10{sup 13} W/cm{sup 2}. Interpenetration of the plasmas was visualized by replacing one of the foils material by magnesium. The main diagnostics viewing the inter-target space were time-resolved monochromatic imaging of the 1s{sup 2} 1s3p aluminum line (He{Beta} at {lambda} {minus} 6.635 {Angstrom}). Doppler broadening measurement with a vertical Johann very high ... continued below

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8 p.

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Chenais-Popovics, C.; Rancu, O. & Renaudin, P. July 14, 1995.

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The collision of laser-produced plasmas has been diagnosed by x-ray spectroscopy and imaging. The two colliding plasmas are produced on Al thin foils at a distance of 200 to 900 {mu}m irradiated at {lambda} = 0.53 {mu}m with laser intensities of 3 {times} 10{sup 13} to 6 {times} 10{sup 13} W/cm{sup 2}. Interpenetration of the plasmas was visualized by replacing one of the foils material by magnesium. The main diagnostics viewing the inter-target space were time-resolved monochromatic imaging of the 1s{sup 2} 1s3p aluminum line (He{Beta} at {lambda} {minus} 6.635 {Angstrom}). Doppler broadening measurement with a vertical Johann very high resolution spectrograph in the range 6.5--6.7{Angstrom}, space-resolved high resolution spectra of the dielectronic satellites of the 1s-2p 1 yman, space-resolved spectra with a flat-crystal spectrograph in the range 5--7 {Angstrom} and in the range of 43--48 {Angstrom} obtained with a new OHM crystal spectrograph and a pinhole camera. A multifluid eulerian monodimensional hydrodynamic code coupled with a radiative-atomic package provided simulations of the experiments. Hydrodynamic 2D simulations calculating the lateral expansion of the plasma enabled a reliable treatment of reabsorption along the line of sight of the spectrographs. The size the time duration of the collision, the plasma parameters (Te,Ti and ne) in the collision region and interpenetration were measured. The hydrocode simulations give a good understanding of the behavior of the collision in function of intertarget distance and laser intensity.

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8 p.

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INIS; OSTI as DE95016631

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  • 40. annual meeting of the Society of Photo-Optical Instrumentation Engineers, San Diego, CA (United States), 9-14 Jul 1995

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  • Other: DE95016631
  • Report No.: UCRL-JC--121582
  • Report No.: CONF-950793--29
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 106489
  • Archival Resource Key: ark:/67531/metadc619551

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  • July 14, 1995

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • June 24, 2016, 2:02 p.m.

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Chenais-Popovics, C.; Rancu, O. & Renaudin, P. X-ray spectroscopy and imaging of a plasma collision, article, July 14, 1995; California. (digital.library.unt.edu/ark:/67531/metadc619551/: accessed April 26, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.