8 research outputs found
Coherent Acceleration of Magnetized Ions by Electrostatic Waves With Arbitrary Wavenumbers
This paper studies the coherent acceleration of ions interacting with two
electrostatic waves in a uniform magnetic field B0. This is a generalization of
an earlier analysis of waves propagating perpendicularly to B0 to include the
effect of wavenumbers along B0. The Lie transformation technique is used to
develop a perturbation theory describing the ion motion, and results are
compared with numerical solutions of the complete equations of motion. Coherent
energization occurs when the Doppler-shifted wave frequencies differ by nearly
an integer multiple of the ion cyclotron frequency. When the difference in the
parallel wavenumbers of the two waves is increased the coherent energization of
ions is limited to a small part of the phase space. The energization of ions
and its dependence on wave parameters is discussed.Comment: 22 pages, 16 figures. Corrected typo
Relativistic Vlasov code development for high energy density plasmas
A newly developed relativistic Vlasov code is introduced. The governing Vlasov-Maxwell equation system is solved numerically in one-dimensional space and three-dimensional momentum space. Spherical coordinate system is adopted to characterize the momentum variables for its potential advantage on reducing computational cost. The resulting Vlasov equation is split into two advection equations with respect to position and momentum, respectively. They are solved with a conservative finite volume scheme, together with techniques suppressing numerical oscillations at sharp interfaces. Relativistic longitudinal plasma oscillations are investigated for different plasma temperatures and wave numbers. Results from code simulations are in good agreement with the existing theories.OpticsPhysics, Atomic, Molecular & ChemicalSCI(E)[email protected]