Observation of resonant energy transfer between identical-frequency laser beams

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Enhanced transmission of a low intensity laser beam is observed when crossed with an identical-frequency beam in a plasma with a flow velocity near the ion sound speed. The time history of the enhancement and the dependence on the flow velocity strongly suggest that this is due to energy transfer between the beams via a resonant ion wave with zero frequency in the laboratory frame. The maximum energy transfer has been observed when the beams cross in a region with Mach 1 flow. The addition of frequency modulation on the crossing beams is seen to reduce the energy transfer by ... continued below

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Afeyan, B. B.; Cohen, B. I.; Estabrook, K. G.; Glenzer, S. H.; Joshi, C.; Kirkwood, R. K. et al. December 9, 1998.

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Enhanced transmission of a low intensity laser beam is observed when crossed with an identical-frequency beam in a plasma with a flow velocity near the ion sound speed. The time history of the enhancement and the dependence on the flow velocity strongly suggest that this is due to energy transfer between the beams via a resonant ion wave with zero frequency in the laboratory frame. The maximum energy transfer has been observed when the beams cross in a region with Mach 1 flow. The addition of frequency modulation on the crossing beams is seen to reduce the energy transfer by a factor of two. Implications for indirect-drive fusion schemes are discussed.

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282 Kilobytes

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  • American Physical Society Meeting, Division of Plasma Physics, New Orleans, LA, November 16-20, 1998

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  • Other: DE00003424
  • Report No.: UCRL-JC-130320
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 3424
  • Archival Resource Key: ark:/67531/metadc685305

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  • December 9, 1998

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  • July 25, 2015, 2:20 a.m.

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  • May 6, 2016, 10:57 p.m.

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Afeyan, B. B.; Cohen, B. I.; Estabrook, K. G.; Glenzer, S. H.; Joshi, C.; Kirkwood, R. K. et al. Observation of resonant energy transfer between identical-frequency laser beams, article, December 9, 1998; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc685305/: accessed December 13, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.