Plasma Interactions in Laser Irradiated Semi-Cylindrical Cavities Studied with Soft X-Ray Interferometry Using a Capillary Discharge Laser

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Soft x-ray interferometry was used to measure the evolution of dense converging plasmas created by laser irradiation of 500 {micro}m diameter semi-cylindrical carbon targets. Optical laser pulses with an intensity of {approx} 1 x 10{sup 12} W cm{sup -2} and 120 ps duration were used to heat the surface of the cavities. The dense plasma formed expands from the walls converging slightly off the semi-cylinder's axis, giving rise to a bright localized high density plasma region. A sequence of electron density maps were measured using a 46.9 nm wavelength tabletop capillary discharge soft x-ray laser probe and a amplitude division ... continued below

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Purvis, M A; Grava, J; Filevich, J; Marconi, M; Rocca, J J; Moon, S J et al. September 19, 2007.

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Soft x-ray interferometry was used to measure the evolution of dense converging plasmas created by laser irradiation of 500 {micro}m diameter semi-cylindrical carbon targets. Optical laser pulses with an intensity of {approx} 1 x 10{sup 12} W cm{sup -2} and 120 ps duration were used to heat the surface of the cavities. The dense plasma formed expands from the walls converging slightly off the semi-cylinder's axis, giving rise to a bright localized high density plasma region. A sequence of electron density maps were measured using a 46.9 nm wavelength tabletop capillary discharge soft x-ray laser probe and a amplitude division interferometer based on diffraction gratings. The measured density profiles are compared with simulations conducted using the multi-dimensional hydrodynamic code HYDRA. The benchmarked model was then used to simulate particle trajectories which reveal that the increase in electron density near the axis is mainly the result of the convergence of plasma that originated at the bottom of the groove during laser irradiation.

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PDF-file: 13 pages; size: 4.1 Mbytes

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  • Journal Name: The International Society for Optical EngineeringSoft X-Ray Lasers and Applications VII, vol. 6702, n/a, October 15, 2007, pp. 670204

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  • Report No.: UCRL-JRNL-234900
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 943808
  • Archival Resource Key: ark:/67531/metadc897125

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  • September 19, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Dec. 6, 2016, 4:01 p.m.

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Purvis, M A; Grava, J; Filevich, J; Marconi, M; Rocca, J J; Moon, S J et al. Plasma Interactions in Laser Irradiated Semi-Cylindrical Cavities Studied with Soft X-Ray Interferometry Using a Capillary Discharge Laser, article, September 19, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc897125/: accessed August 15, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.