Relativistic Raman instability shifted by half-plasma frequency
- Princeton Plasma Physics Laboratory, James Forrestal Campus, Princeton, New Jersey 08543 (United States)
A new nonlinear Raman instability in underdense plasma is investigated theoretically. Unlike the usual linear Raman instabilities which grow exponentially in time, this instability takes a finite amount of time to diverge. The explosion time {ital t}{sub {infinity}} depends on the initial level of the perturbation. A general set of equations for spatio-temporal evolution of the forward nonlinear Raman scattering is derived and its temporal evolution is studied in detail. This new instability results in the generation of forward Raman radiation shifted by half the plasma frequency for laser intensities of order or exceeding 10{sup 18} W/cm{sup 2}, something that has been recently observed [A. Modena (private communication, 1995)]. {copyright} {ital 1996 American Institute of Physics.}
- Research Organization:
- Princeton Plasma Physics Laboratory
- DOE Contract Number:
- AC02-76CH03073
- OSTI ID:
- 282009
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 3 Vol. 3; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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