28 citations · 102 across the 16 of their papers we have counts for
17 papers
Coherent axion electrodynamics in OSIRIS: a counter-propagating axion-photon parametric instability
Miles Radford, Pablo Bilbao, Thomas Grismayer +4
We present a coherent axion-electrodynamics extension of the OSIRIS particle-in-cell code and use it to identify and benchmark a parametric axion-photon instability supported by tw…
Two-Phase Structure of Synchrotron-Cooling-Unstable Relativistic Plasma
Agnieszka Wierzchucka, Pablo J. Bilbao, Robert J. Ewart +2
Using analytic theory, radiative particle-in-cell (PIC) simulations, and fluid simulations, we show that relativistic, synchrotron-cooling, collisionless, high- pair plasmas fil…
An axion framework for Particle-in-Cell codes with Monte-Carlo sampling: emission, absorption, and detailed balance in plasmas
Miles Radford, Ahmed Alsulami, Bertrand Martinez +5
We present an extension of the OSIRIS particle-in-cell (PIC) code that introduces an axion macroparticle species and three axion-production channels commonly used in thermal-plasma…
Double-Adiabatic Equations of State for Relativistic Plasmas
Agnieszka Wierzchucka, Pablo J. Bilbao, Alexander G. R. Thomas +2
The adiabatic equation of state describes the pressure evolution of highly collisional, isotropic plasmas in terms of their density, providing a possible closure of…
General-relativistic and non-ideal radiative cooling in neutron star magnetospheres
João Joaquim, Francisco Assunção, Pablo J. Bilbao +1
Radiation reaction cooling plays an important role in describing the extreme plasma conditions found in the magnetospheres of astrophysical compact objects. Strong electromagnetic…
Laboratory observation of collective beam-plasma instabilities in a relativistic pair jet
J W D Halliday, C D Arrowsmith, A M Goillot +37
We report on a measurement of collective behavior in a relativistic electron-positron pair plasma produced in the laboratory. Using the Fireball platform at CERN's HiRadMat facilit…
Learning collision operators from plasma phase space data using differentiable simulators
Diogo D. Carvalho, Pablo J. Bilbao, Warren B. Mori +2
We propose a methodology to infer collision operators from phase space data of plasma dynamics. Our approach combines a differentiable kinetic simulator, whose core component in th…
Phase-Space Shaping in Wakefield Accelerators due to Betatron Cooling
Pablo J. Bilbao, Thales Silva, Luis O. Silva
Plasma-based accelerators are beginning to employ relativistic beams with unprecedented charge and ultrashort durations. These dense driver beams can drive wakes even in high-densi…
Suppression of pair beam instabilities in a laboratory analogue of blazar pair cascades
Charles D. Arrowsmith, Francesco Miniati, Pablo J. Bilbao +28
The generation of dense electron-positron pair beams in the laboratory can enable direct tests of theoretical models of -ray bursts and active galactic nuclei. We have successfu…
The electron cyclotron maser instability in laser-ionized plasmas
Thales Silva, Pablo J. Bilbao, Luis O. Silva
We show that circularly polarized lasers create plasmas with long-lasting ring-shaped weakly relativistic momentum distributions which, in the presence of an ambient magnetic field…
Radiative cooling induced coherent maser emission in relativistic plasmas
Pablo J. Bilbao, Thales Silva, Luis O. Silva
Relativistic plasmas in strong electromagnetic fields exhibit distinct properties compared to classical plasmas. In astrophysical environments, such as neutron stars, white dwarfs,…
Relaxation to universal non-Maxwellian equilibria in a collisionless plasma
Robert J. Ewart, Michael L. Nastac, Pablo J. Bilbao +3
Generic equilibria are derived for turbulent relaxing plasmas via an entropy-maximization procedure that accounts for the short-time conservation of certain collisionless invariant…
Ring momentum distributions as a general feature of Vlasov dynamics in the synchrotron dominated regime
Pablo. J. Bilbao, Robert J. Ewart, Francisco Assunçao +2
We study how radiation reaction leads plasmas initially in kinetic equilibrium to develop features in momentum space, such as anisotropies and population inversion, resulting in a…
Laboratory realization of relativistic pair-plasma beams
C. D. Arrowsmith, P. Simon, P. Bilbao +26
Relativistic electron-positron plasmas are ubiquitous in extreme astrophysical environments such as black holes and neutron star magnetospheres, where accretion-powered jets and pu…
Radiation reaction cooling as a source of anisotropic momentum distributions with inverted populations
Pablo J. Bilbao, Luis O. Silva
Under the presence of strong electromagnetic fields and radiation reaction, plasmas develop anisotropic momentum distributions, characterized by a population inversion. This is a g…
Machine Learning-based models in particle-in-cell codes for advanced physics extensions
Chiara Badiali, Pablo J. Bilbao, Fábio Cruz +1
In this paper we propose a methodology for the efficient implementation of Machine Learning (ML)-based methods in particle-in-cell (PIC) codes, with a focus on Monte-Carlo or stati…
Enhanced laser-driven proton acceleration via improved fast electron heating in a controlled pre-plasma
L. A. Gizzi, E. Boella, L. Labate +10
The interaction of ultraintense laser pulses with solids is largely affected by the plasma gradient at the vacuum-solid interface, which modifies the absorption and ultimately, con…