Raman forward scattering of high-intensity chirped laser pulses
Raman forward scattering of a high-intensity, short-duration, frequency-chirped laser pulse propagating in an underdense plasma is examined. The growth of the direct forward scattered light is calculated for a laser pulse with a linear frequency chirp in various spatio-temporal regimes. This includes a previously undescribed regime of strongly-coupled four-wave nonresonant interaction, which is important for relativistic laser intensities. In all regimes of forward scattering, it is shown that the growth rate increases (decreases) for positive (negative) frequency chirp. The effect of chirp on the growth rate is relatively minor, i.e., a few percent chirp yields few percent changes in the growth rates. Relation of these results to recent experiments is discussed.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of High Energy and Nuclear Physics. Division of High Energy Physics (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 807424
- Report Number(s):
- LBNL-51579; R&D Project: 455401; B& R KA1501020; TRN: US0301828
- Resource Relation:
- Conference: Advanced Accelerator Concepts Workshop, Mandalay Beach, CA (US), 06/23/2002--06/28/2002; Other Information: PBD: 23 Jun 2002
- Country of Publication:
- United States
- Language:
- English
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