The evolution of ultra-intense, short-pulse lasers in underdense plasmas

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The propagation of short-pulse lasers through underdense plasmas at ultra-high intensities (I {>=}10{sup 19}W/cm) is examined. The pulse evolution is found to be significantly different than it is for moderate intensities. Rather than beam breakup from self-modulation, Raman forward scattering and laser hose instabilities the behavior is dominated by leading edge erosion. A differential equation which describes local pump depletion is derived and used to analyze the formation and evolution of the erosion. This pulse erosion is demonstrated with one dimensional particle in cell (PIC) simulations. In addition, two dimensional simulations are presented which show pulse erosion along with other ... continued below

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31 p.

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Decker, C. D.; Mori, W. B. & Tzeng, K. C. November 3, 1995.

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  • Decker, C. D. Lawrence Livermore National Laboratory, CA (United States)
  • Mori, W. B.
  • Tzeng, K. C. Univ. of Southern California, Los Angeles, CA (United States). Depts. of Physics and Electrical Engineering

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Description

The propagation of short-pulse lasers through underdense plasmas at ultra-high intensities (I {>=}10{sup 19}W/cm) is examined. The pulse evolution is found to be significantly different than it is for moderate intensities. Rather than beam breakup from self-modulation, Raman forward scattering and laser hose instabilities the behavior is dominated by leading edge erosion. A differential equation which describes local pump depletion is derived and used to analyze the formation and evolution of the erosion. This pulse erosion is demonstrated with one dimensional particle in cell (PIC) simulations. In addition, two dimensional simulations are presented which show pulse erosion along with other effects such as channeling and diffraction.

Physical Description

31 p.

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INIS; OSTI as DE96005376

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  • 37. annual meeting of the American Physical Society Division of Plasma Physics, Louisville, KY (United States), 6-10 Nov 1995

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  • Other: DE96005376
  • Report No.: UCRL-JC--122408
  • Report No.: CONF-951182--5
  • Grant Number: FG03-92ER40727;FG03-93ER40776
  • Office of Scientific & Technical Information Report Number: 193909
  • Archival Resource Key: ark:/67531/metadc665536

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 3, 1995

Added to The UNT Digital Library

  • June 29, 2015, 9:42 p.m.

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  • May 31, 2016, 6:23 p.m.

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Decker, C. D.; Mori, W. B. & Tzeng, K. C. The evolution of ultra-intense, short-pulse lasers in underdense plasmas, article, November 3, 1995; California. (digital.library.unt.edu/ark:/67531/metadc665536/: accessed October 18, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.