Quantifying ionization in hot dense plasmas
Physical Review E American Physical Society 109 (2024) L023201
Abstract:Ionization is a problematic quantity in that it does not have a well-defined thermodynamic definition, yet it is a key parameter within plasma modelling. One still therefore aims to find a consistent and unambiguous definition for the ionization state. Within this context we present finite-temperature density functional theory calculations of the ionization state of carbon in CH plasmas using two potential definitions: one based on counting the number of continuum electrons, and another based on the optical conductivity. Differences of up to 10% are observed between the two methods. However, including “Pauli forbidden” transitions in the conductivity reproduces the counting definition, suggesting such transitions are important to evaluate the ionization state.
Multi-GeV wakefield acceleration in a plasma-modulated plasma accelerator
Physical Review E American Physical Society (APS) 109:2 (2024) 025206
Energy gain of wetted-foam implosions with auxiliary heating for inertial fusion studies
Plasma Physics and Controlled Fusion IOP Publishing 66:2 (2024) 025005
Classical Larmor formula through the Unruh effect for uniformly accelerated electrons
Physical Review D: Particles, Fields, Gravitation and Cosmology American Physical Society 109 (2024) 024044
Abstract:We investigate the connection between the classical Larmor formula and the quantum Unruh effect by computing the emitted power by a uniformly accelerated charged particle and its angular distribution in the co-accelerated frame. We consider a classical particle accelerated with non-zero charge only for a finite period and then take the infinite-time limit after removing the effects due to the initial charging and final discharging processes. We show that the result found for the interaction rates agrees with previous studies in which the period of acceleration with non-zero charge was taken to be infinite from the beginning. We also show that the power and angular distribution of emission, which is attributed either to the emission or absorption of a Rindler photon in the co-accelerated frame, is given by the Larmor formula, confirming that, at tree level, it is necessary to take into account the Unruh effect in order to reproduce the classical Larmor radiation formula in the coaccelerated frame.
Quantum effects on dynamic structure factors in dense magnetized plasmas
Physical Review E: Statistical, Nonlinear, and Soft Matter Physics American Physical Society 6:1 (2024) 013089