Relativistic plasma-wave excitation by collinear optical mixing

C. E. Clayton, C. Joshi, C. Darrow, D. Umstadter

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Abstract

The relativistic plasma wave excited when the frequency difference between two copropagating CO2 laser beams equals the plasma frequency is detected for the first time. The plasma-wave frequency, wave number, spatial extent, and saturation time are directly measured by use of 7-mrad, collective, ruby Thomson scattering and the forward-scattered ir spectrum. The wave amplitude nn0 is inferred to be (1-3)% which gives a longitudinal electric field of 0.3 to 1 GV/m at a laser intensity of 1.7×1013 W/cm2, in reasonable agreement with theory.

Original languageEnglish (US)
Pages (from-to)2343-2346
Number of pages4
JournalPhysical Review Letters
Volume54
Issue number21
DOIs
StatePublished - Jan 1 1985

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

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