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A Hilbert-Vlasov code for the study of high-frequency plasma beatwave accelerator

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5 Author(s)
A. Ghizzo ; Henri Poincare Univ., Vandoeuvre les Nancy, France ; P. Bertrand ; M. L. Begue ; T. W. Johnston
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High-frequency beatwave simulations relevant to the University of California at Los Angeles (UCLA) experiment with relativistic eulerian hybrid Vlasov code are presented. These Hilbert-Masov simulations revealed a rich variety of phenomena associated with the fast particle dynamics induced by beatwave experiment for a high ratio of driver frequency to plasma frequency ωpumpplasma ≈33. The present model allows us to extend detailed modeling to frequency ratios greater than the current practical maximum of 10 or so, for Vlasov or particle-in-cell (PIC) codes, by replacing the Maxwell equations by mode equations for the electromagnetic Vlasov code. Numerical results, including beat frequency chirping (i.e., pump frequency linearly decreasing with time), show that the amplitude limit due to relativistic detuning can be enhanced with accelerated particles up to the ultrarelativistic energies with a high-acceleration gradient of more than 25 GeV/m

Published in:

IEEE Transactions on Plasma Science  (Volume:24 ,  Issue: 2 )