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17 papers · 2 filters
Magnetized Current Filaments as a Source of Circularly Polarized Light
U. Sinha, J. Martins, J. Vieira +3
We show that the Weibel or currente filamentation instability can lead to the emission of circularly polarized radiation. Using particle-in-cell (PIC) simulations and a radiation p…
Light Spring amplification in a multi-frequency Raman amplifier
J. A. Arteaga, A. Serbeto, K. H. Tsui +1
We propose to amplify and compress an ultrashort Light Spring laser seed with a long Gaussian-shaped laser pump through Raman amplification. This Light Spring, which has a helical…
Linear Theory of Electron-Plasma Waves at Arbitrary Collisionality
R. Jorge, P. Ricci, S. Brunner +5
The dynamics of electron-plasma waves are described at arbitrary collisionality by considering the full Coulomb collision operator. The description is based on a Hermite-Laguerre d…
Radiation emission in laser-wakefields driven by structured laser pulses with orbital angular momentum
J. L. Martins, J. Vieira, J. Ferri +1
High-intensity X-ray sources are invaluable tools, enabling experiments at the forefront of our understanding of materials science, chemistry, biology, and physics. Laser-plasma el…
Dependence of alpha-particle-driven Alfvén eigenmode linear stability on device magnetic field strength and consequences for next-generation tokamaks
E. A. Tolman, N. F. Loureiro, P. Rodrigues +2
Recently-proposed tokamak concepts use magnetic fields up to 12 T, far higher than in conventional devices, to reduce size and cost. Theoretical and computational study of trends i…
Optical control of the topology of laser-plasma accelerators
J. Vieira, J. T. Mendonça, F. Quéré
We propose a twisted plasma accelerator capable of generating relativistic electron vortex beams with helical current profiles. The angular momentum of these vortex bunches is quan…