2014/07/12 by Aakash A. Sahai, Sahai, Aakash A., Thomas C. Katsouleas +5
Earth and Planetary Sciences · Physics and Astronomy · #Accelerator Physics (physics.acc-ph) #Computational Physics (physics.comp-ph) #FOS: Physical sciences #High-pressure geophysics and materials #Laser-Plasma Interactions and Diagnostics #Plasma Physics (physics.plasm-ph) #Vacuum and Plasma Arcs #physics.acc-ph #physics.comp-ph #physics.plasm-ph
paper · pdf · doi:10.48550/arxiv.1407.3406
Proceedings of International Particle Accelerator Conference, IPAC 2014, Dresden, Germany, June 2014, http://accelconf.web.cern.ch/AccelConf/IPAC2014/papers/tupme051.pdf
arxiv created 2014/07/12 · openalex publication_date 2014/07/12 · arxiv updated 2014/07/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We model the trapping of plasma e- within the density structures excited by a propagating energy source (βS≃1) in a rising plasma density gradient. Rising density gradient leads to spatially contiguous coupled up-chirped plasmons (dω2pe(x)/dx>0). Therefore phase mixing between plasmons can lead to trapping until the plasmon field is high enough such that e- trajectories returning towards a longer wavelength see a trapping potential. Rising plasma density gradients are ubiquitous for confining the plasma within sources at the vacuum-plasma interfaces. Therefore trapping of plasma-e- in a rising ramp is important for acceleration diagnostics and to understand the energy dissipation from the excited plasmon train \citeLTE-2013. Down-ramp in density \citedensity-transition-2001 has been used for plasma-e- trapping within the first bucket behind the driver. Here, in rising density gradient the trapping does not occur in the first plasmon bucket but in subsequent plasmon buckets behind the driver. Trapping reduces the Hamiltonian of each bucket where e- are trapped, so it is a wakefield-decay probe. Preliminary computational results for beam and laser-driven wakefield are shown.