Electron mirror instability: particle-in-cell simulations

Electron firehose instability: Kinetic linear theory and two-dimensional particle-in-cell simulations

[1] The kinetic electron firehose instability (EFI) is thought to be a crucial mechanism for constraining the observed electron anisotropy in expanding astrophysical plasmas, such as the solar wind. The EFI arises in a bi-Maxwellian plasma when the parallel temperature is greater than the perpendicular one, and its effect is to reduce anisotropy. We study this mechanism via kinetic linear theor...

Electron Cloud Instability Simulations for the LHC

We present results of simulations of transverse single bunch instabilities for the LHC and LHC Upgrade scenarios and in particular first results with electron cloud in the dipole regions. The possibility to use the code HEADTAIL below the threshold of the fast instability is under study and we here discuss a possible way to distinguish numerical noise from true physics.

Particle-in-cell simulations of electron transport from plasma turbulence: recent progress in gyrokinetic particle simulations of turbulent plasmas

Recent progress in gyrokinetic particle-in-cell simulations of turbulent plasmas using the gyrokinetic toroidal code (GTC) is surveyed. In particular, recent results for electron temperature gradient (ETG) modes and their resulting transport are presented. Also, turbulence spreading, and the effects of the parallel nonlinearity, are described. The GTC code has also been generalized for non-circ...

Particle-in-cell simulations of hot electron generation using defocused laser light in cone targets

Particle-in-cell simulations of high energy electron production by intense laser pulses in underdense plasmas

The propagation of intense laser pulses and the generation of high energy electrons from the underdense plasmas are investigated using two dimensional particlein-cell simulations. When the ratio of the laser power and a critical power of relativistic self-focusing is the optimal value, it propagates stably and electrons have maximum energies.