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A kinetic model for the resonant heating of ions by Alfvén waves that propagate along the magnetic field lines and wave frequencies in the ion-cyclotron frequency range is developed. In terms of the quasi-linear approach, particle–Alfvén wave interactions are examined from the Vlasov equation...
It is widely believed that almost all magnetic fields in a natural environment are the result of the dynamo process—the field generation in moving nearly homogeneous electro-conducting fluids. This dynamo process occurs in the depths of celestial bodies such as the Earth, most of the planets,...
In low-pressure discharges, where the electron mean free path is larger or comparable with the discharge length, the electron dynamics is essentially nonlocal. Moreover, the electron energy distribution function (EEDF) deviates considerably from a Maxwellian. Therefore, an accurate kinetic...
A mechanism that has gained great attention in the field of laser-ion acceleration due to remarkable properties of the accelerated beam is laser acceleration of protons from the rear surface of solid targets. It is shown that these protons are capable of transporting structure information from...
Strong kinetic heating of grains is frequently associated with a melting transition in plasma crystals. At high pressures, above 100 mTorr, the melting transition is preceded by a vibrational phase whereas at low pressures, below 50 mTorr, observed large amplitude self-excited oscillations can...
Current profile control by ac magnetic helicity injection is computationally investigated in a reversed field pinch (RFP). Three-dimensional resistive magnetohydrodynamics (MHD) computation is employed to study the nonlinear MHD. During ac helicity injection, when toroidal and poloidal surface...
Coherent terahertz and millimeter wave radiation from laser accelerated electron bunches has been measured. The bunches were produced by tightly focusing (spot diameter ≈ 6 μ m) ≈ 6 μ m ) a high peak power (up to 10 TW), ultra-short ( ≥ 50 fs) ( ⩾ 50 fs ) laser pulse from a high...
Global gyrokinetic simulations of turbulence include physical effects that are not retained in local flux-tube simulations. Nevertheless, in the limit of sufficiently small ρ ∗ ρ ∗ (gyroradius compared to system size) it is expected that a local simulation should agree with a global one (at...
Determining the scaling of transport with beta (β), the ratio of the plasma kinetic pressure to the magnetic pressure, helps to differentiate between various proposed theories of turbulent transport since mechanisms that are primarily electrostatic show little change in transport with increasing...
Nonlinear rf-driven sheared flows are of interest for turbulence control and basic physics experiments. Short-wavelength slow modes are required for efficient coupling of wave momentum to the plasma, requiring a kinetic hot-plasma theory. Here, a guiding-center formulation is developed which...
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