Convective amplification of a three-wave parametric instability in inhomogeneous plasma
- Department of Engineering Physics, Tsinghua University, Beijing 100084 (China)
The three-wave parametric instability in inhomogeneous plasma is revisited and the inconsistency of the convective amplification in previous literatures is resolved. By employing multiple methods, the amplification factor of the decay mode due to the inhomogeneity is confirmed as A=πγ{sub 0}{sup 2}/(v{sub g1x}v{sub g2x}κ{sup ′}), which is independent of the linear damping rate of the decay mode, where γ{sub 0} is the nonlinear growth rate in homogeneous plasma, v{sub g1x} and v{sub g2x} are the group velocities in the x direction of the two decay modes and κ{sup ′} is the derivative of the wavevector mismatch of the three coupled waves due to the plasma inhomogeneity.
- OSTI ID:
- 22218470
- Journal Information:
- Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 11 Vol. 20; ISSN PHPAEN; ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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