Stimulated brillouin scattering of electromagnetic ion cyclotron waves in a plasma |
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Authors: | Md. Salimullah R. R. Sharma V. K. Tripathi |
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Affiliation: | (1) Indian Institute of Technology, Delhi, 110029 New Delhi, India;(2) Department of Physics and Astronomy, University of Maryland, 20742 College Park, MD, USA |
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Abstract: | Using the fluid model for the nonlinear response of ions, we have studied the nonlinear scattering of an electromagnetic ion cyclotron wave off the ion acoustic wave in a plasma. The low frequency nonlinearity arises through the parallel ponderomotive force on ions and the high frequency nonlinearity arises through the nonlinear current density of ions. For a typical nonisothermal plasma (T e/T i∼10) the threshold for this instability in a uniform plasma is ∼1mW/cm2. At power densities ≳102 W/cm2, the growth rate for backscatter turns out to be ∼104s−1. |
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Keywords: | 52.35 Py 52.35 Mw 52.25 Ps |
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