402 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Instituto Superior TécnicoPT62 papers
- Instituto de Plasmas e Fusão NuclearPT57 papers
- Iscte – Instituto Universitário de LisboaPT28 papers
- University of California, Los AngelesUS24 papers
- University of LisbonPT21 papers
- Imperial College LondonGB13 papers
- Lawrence Livermore National LaboratoryUS9 papers
- Rutherford Appleton LaboratoryGB8 papers
- Central Laser Facility7 papers
- Lancaster UniversityGB7 papers
- Max Planck Institute for PhysicsDE7 papers
- SLAC National Accelerator LaboratoryUS7 papers
42 papers · 1 filter
Optimal laser focusing for positron production in laser-electron scattering
Óscar Amaro, Marija Vranic
Laser-electron beam collisions that aim to generate electron-positron pairs require laser intensities , which can be obtained by focusing a 1-PW…
Dissipation of electron-beam-driven plasma wakes
Rafal Zgadzaj, Zhengyan Li, M. C. Downer +10
Metre-scale plasma wakefield accelerators have imparted energy gain approaching 10 gigaelectronvolts to single nano-Coulomb electron bunches. To reach useful average currents, howe…
On numerical errors to the fields surrounding a relativistically moving particle in PIC codes
Xinlu Xu, Fei Li, Frank S. Tsung +7
The particle-in-cell (PIC) method is widely used to model the self-consistent interaction between discrete particles and electromagnetic fields. It has been successfully applied to…
Interplay between the Weibel instability and the Biermann battery in realistic laser-solid interactions
N. Shukla, K. Schoeffler, E. Boella +3
A novel setup allows the Weibel instability and its interplay with the Biermann battery to be probed in laser-driven collisionless plasmas. Ab initio particle-in-cell (PIC) simulat…
Single-shot multi-keV X-ray absorption spectroscopy using an ultrashort laser wakefield accelerator source
B. Kettle, E. Gerstmayr, M. J. V. Streeter +19
Single-shot absorption measurements have been performed using the multi-keV X-rays generated by a laser wakefield accelerator. A 200 TW laser was used to drive a laser wakefield ac…
Signatures of the self-modulation instability of relativistic proton bunches in the AWAKE experiment
M. Moreira, J. Vieira, P. Muggli
We investigate numerically the detection of the self-modulation instability in a virtual detector located downstream from the plasma in the context of AWAKE. We show that the densi…
Ultrafast Imaging of Laser Driven Shock Waves using Betatron X-rays from a Laser Wakefield Accelerator
J. C. Wood, D. J. Chapman, K. Poder +21
Betatron radiation from laser wakefield accelerators is an ultrashort pulsed source of hard, synchrotron-like x-ray radiation. It emanates from a centimetre scale plasma accelerato…
Bright X-ray radiation from plasma bubbles in an evolving laser wakefield accelerator
M. S. Bloom, M. J. V. Streeter, S. Kneip +17
We show that the properties of the electron beam and bright x-rays produced by a laser wakefield accelerator can be predicted if the distance over which the laser self-focuses and…
Ion acceleration in electrostatic collisionless shock: on the optimal density profile for quasi-monoenergetic beams
E. Boella, F. Fiúza, A. Stockem Novo +2
A numerical study on ion acceleration in electrostatic shock waves is presented, with the aim of determining the best plasma configuration to achieve quasi-monoenergetic ion beams…
AWAKE readiness for the study of the seeded self-modulation of a 400\,GeV proton bunch
P. Muggli, E. Adli, R. Apsimon +104
AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here is ready for systematic study of the seeded self-mod…
Quantum Electrodynamics vacuum polarization solver
Thomas Grismayer, Rui Torres, Pedro Carneiro +3
The self-consistent modeling of vacuum polarization due to virtual electron-positron fluctuations is of relevance for many near term experiments associated with high intensity radi…
Laser absorption via QED cascades in counter propagating laser pulses
Thomas Grismayer, Marija Vranic, Joana L. Martins +2
A model for laser light absorption in electron-positron plasmas self-consistently created via QED cascades is described. The laser energy is mainly absorbed due to hard photon emis…
Path to AWAKE: Evolution of the concept
A. Caldwell, E. Adli, L. Amorim +118
This report describes the conceptual steps in reaching the design of the AWAKE experiment currently under construction at CERN. We start with an introduction to plasma wakefield ac…
Seeded QED cascades in counter propagating laser pulses
Thomas Grismayer, Marija Vranic, Joana L Martins +2
The growth rates of seeded QED cascades in counter propagating lasers are calculated with first principles 2D/3D QED-PIC simulations. The dependence of the growth rate on laser pol…
Self-modulated laser wakefield accelerators as x-ray sources
N. Lemos, J. L. Martins, F. S. Tsung +5
The development of a directional, small-divergence, and short-duration picosecond x-ray probe beam with an energy greater than 50 keV is desirable for high energy density science e…
Classical Radiation Reaction in Particle-In-Cell Simulations
Marija Vranic, Joana L. Martins, Ricardo A. Fonseca +1
Under the presence of ultra high intensity lasers or other intense electromagnetic fields the motion of particles in the ultrarelativistic regime can be severely affected by radiat…
Enhanced Stopping of Macro-Particles in Particle-in-Cell Simulations
Josh May, John Tonge, Warren B. Mori +4
We derive an equation for energy transfer from relativistic charged particles to a cold background plasma appropriate for finite-size particles that are used in particle-in-cell si…
Exploring the nature of collisionless shocks under laboratory conditions
A. Stockem, F. Fiuza, A. Bret +2
Collisionless shocks are pervasive in astrophysics and they are critical to understand cosmic ray acceleration. Laboratory experiments with intense lasers are now opening the way t…
Exploiting multi-scale parallelism for large scale numerical modelling of laser wakefield accelerators
Ricardo A. Fonseca, Jorge Vieira, Frederico Fiúza +4
A new generation of laser wakefield accelerators, supported by the extreme accelerating fields generated in the interaction of PW-Class lasers and underdense targets, promises the…
Laser-plasma interactions for fast ignition
A. J. Kemp, F. Fiuza, A. Debayle +5
In the electron-driven fast-ignition approach to inertial confinement fusion, petawatt laser pulses are required to generate MeV electrons that deposit several tens of kilojoules i…
Interaction of Ultra Relativistic e- e+ Fireball Beam with Plasma
P. Muggli, S. F. Martins, N. Shukla +2
Ab initio simulations of the propagation in a plasma of a soon to be available relativistic electron-positron beam or fireball beam provide an effective mean for the study of micro…
Measuring fast electron spectra and laser absorption in relativistic laser-solid interactions using differential bremsstrahlung photon detectors
R. H. H. Scott, E. L. Clark, F. Perez +9
A photon detector suitable for the measurement of bremsstrahlung spectra generated in relativistically-intense laser-solid interactions is described. The Monte Carlo techniques use…
Ion acceleration from laser-driven electrostatic shocks
F. Fiuza, A. Stockem, E. Boella +6
Multi-dimensional particle-in-cell simulations are used to study the generation of electrostatic shocks in plasma and the reflection of background ions to produce high-quality and…
Relativistic generalization of formation and ion reflection conditions in electrostatic shocks
A. Stockem, E. Boella, F. Fiuza +1
The theoretical model by Sorasio et al. (2006) for the steady state Mach number of electrostatic shocks formed in the interaction of two plasma slabs of arbitrary density and tempe…