Mainz 2022 – wissenschaftliches Programm
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AKBP: Arbeitskreis Beschleunigerphysik
AKBP 12: New Accelerator Concepts 2
AKBP 12.6: Vortrag
Mittwoch, 30. März 2022, 17:15–17:30, AKBP-H14
Radiative particle-in-cell simulations of the beam hosing instability -- an analysis by components — •Anton Lebedev1, Richard Pausch1, Rene Widera1, Sergei Bastrakov1, Michael Bussmann1,2, Ulrich Schramm1,3, and Alexander Debus1 — 1Abteilung Laser-Teilchenbeschleunigung, Helmholtz Zentrum Dresden-Rossendorf, Dresden — 2Center for Advanced Systems Understanding, Görlitz — 3Institut für Strahlenphysik, Technische Universität Dresden, Dresden
We present first results and analyses of radiation spectra expected to be produced by ultrarelativistic particle beams propagating through a plasma medium experiencing the hosing instability. We determine these spectra in particle-in-cell simulations by in-situ computation of radiation based on Liénard-Wiechert potentials, emitted by all simulated particles (>10^9) of the beam and plasma for over 160 distinct detectors distributed across half a solid angle.
In the simulation campaign, conducted at the JUWELS Booster cluster at JSC, we considered linear and non-linear regimes of the instability for ultrarelativistic electron beams of varying emittance impacting a homogeneous electron plasma. We further show a preliminary analysis of the data relating observed characteristics of the spectra to the characteristics of the instability.
Our goal is to open up new experimental avenues for better understanding the beam instability evolution by identifying its radiation signatures that can be measured in experiments.