Measurement of the frequency and spectral width of the Langmuir wave spectrum driven by stimulated Raman scattering

Journal Article · Mon Nov 01 04:00:00 EST 1999 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.873706· OSTI ID:698923

Baker, K L; Drake, R P; Estabrook, K G; Sleaford, B; Prasad, M K ^[1]; La Fontaine, B ^[2]; Villeneuve, D M ^[3]

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1. Plasma Physics Research Institute, University of California Davis
2. Institut National de la Recherche Scientifique-Energie et Materiaux, Quebec, J3X 1S2 (CANADA)
3. National Research Council of Canada, Ottawa, Ontario, (Canada) K1A OR6

Thomson scattering was used to measure the spectrum of Langmuir waves, in both frequency and wave number, driven below quarter-critical density by a laser beam. These measurements were capable of detecting and identifying waves driven by stimulated Raman scattering (SRS) and also of detecting waves driven by other effects such as the bump-on-tail instability postulated by the enhanced Thomson scattering model of Raman emission. The observed Langmuir waves were consistent with SRS and not with other possible sources. The width in {ital k}-space of the measured Thomson scattering signals also has implications for the saturation amplitude of the Langmuir waves. {copyright} {ital 1999 American Institute of Physics.}

• OSTI ID: 698923
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 6; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
LANGMUIR FREQUENCY
LIGHT TRANSMISSION
PLASMA WAVES
RAMAN EFFECT
SATURATION
THOMSON SCATTERING