69 citations · 270 across the 15 of their papers we have counts for
16 papers
Spatiotemporal shaping of broadband helical light pulses at relativistic intensities
Andrew Longman, Danny Attiyah, Elizabeth Grace +6
Spatiotemporal control of laser pulses at relativistic intensities is a longstanding goal with broad implications in laser-plasma acceleration, high-brightness radiation sources, a…
Ponderomotive-expulsion: toward creating an electron-free volume
Smrithan Ravichandran, Teresa Cebriano, José Luis Henares +5
We describe a demonstration of a prototype approach to clear the laser focal volume of free electrons and disable their atomic and molecular sources. Employing two temporally separ…
Towards direct spatial and intensity characterization of ultra-high intensity laser pulses using ponderomotive scattering of free electrons
A. Longman, S. Ravichandran, L. Manzo +12
Spatial distributions of electrons ionized and scattered from ultra-low pressure gases are proposed and experimentally demonstrated as a method to directly measure the intensity of…
Imaging electron angular distributions to assess a full-power petawatt-class laser focus
Smrithan Ravichandran, Marine Huault, Roberto Lera +5
We present a novel technique to assess the focal volume of petawatt-class lasers at full power. Our approach exploits quantitative measurement of the angular distribution of electr…
A cylindrical implosion platform for the study of highly magnetized plasmas at LMJ
G. Pérez-Callejo, C. Vlachos, C. A. Walsh +27
Investigating the potential benefits of the use of magnetic fields in Inertial Confinement Fusion (ICF) experiments has given rise to new experimental platforms like the Magnetized…
Towards a direct measurement of the quantum vacuum Lagrangian coupling coefficients using two counter propagating super-intense laser pulses
Luis Roso, Roberto Lera, Smrithan Ravichandran +8
In this paper we will show that photon-photon collision experiments using extreme lasers can provide measurable effects giving fundamental information about the essence of QED, its…
Kilo-Tesla axial magnetic field generation with high intensity spin and orbital angular momentum beams
Andrew Longman, Robert Fedosejevs
Absorption of angular momentum from a high intensity laser pulse can lead to the generation of strong axial magnetic fields in plasma. The effect, known as the inverse Faraday effe…
A quasi-monoenergetic short time duration compact proton source for probing high energy density states of matter
J. I. Apiñaniz, S. Malko, R. Fedosejevs +15
We report on the development of a highly directional, narrow energy band, short time duration proton beam operating at high repetition rate, suitable for measurements of stopping p…
Optimal Laguerre-Gaussian Modes for High-Intensity Optical Vortices
Andrew Longman, Robert Fedosejevs
With increasing interest in using orbital angular momentum (OAM) modes in high-power laser systems, accurate mathematical descriptions of the high-intensity modes at focus are requ…
Towards an in situ, full-power gauge of the focal-volume intensity of petawatt-class lasers
C. Z. He, A. Longman, J. A. Pérez-Hernández +7
About 50 years ago, Sarachick and Schappert [Phys. Rev. D. 1, 2738 (1970)] showed that relativistic Thomson scattering leads to wavelength shifts that are proportional to the laser…
Development of an adjustable Kirkpatrick-Baez microscope for laser driven x-ray sources at CLPU
G. Zeraouli, G. gatti, A. Longman +6
A promising prototype of a highly adjustable Kirkpatrick-Baez (KB) microscope has been designed, built and tested in a number of laser driven x-ray experiments using the high power…
Collisionless shock acceleration of narrow energy spread ion beams from mixed species plasmas using 1 m lasers
A. Pak, S. Kerr, N. Lemos +15
Collisionless shock acceleration of protons and C ions has been achieved by the interaction of a 10 W/cm, 1 m laser with a near-critical density plasma. Ablati…
Dual-Band Quasi-Coherent Radiative Thermal Source
Ryan Starko-Bowes, Jin Dai, Ward Newman +9
Thermal radiation from an unpatterned object is similar to that of a gray body. The thermal emission is insensitive to polarization, shows only Lambertian angular dependence, and i…
Thermal graphene metamaterials and epsilon-near-zero high temperature plasmonics
Sarang Pendharker, Huan Hu, Sean Molesky +7
The key feature of a thermophotovoltaic (TPV) emitter is the enhancement of thermal emission corresponding to energies just above the bandgap of the absorbing photovoltaic cell and…
Optical Characterization of Epsilon-Near-Zero, Epsilon-Near-Pole and Hyperbolic Response in Nanowire Metamaterials
Ryan Starko-Bowes, Jon Atkinson, Ward Newman +6
We report on the optical and physical characterization of metallic nanowire (NW) metamaterials fabricated by electrodeposition of ~30 nm diameter gold nanowires in nano-porous anod…
GeV electrons due to a transition from laser wakefield acceleration to plasma wakefield acceleration
P. E. Masson-Laborde, M. Z. Mo, A. Ali +6
We show through experiments that a transition from laser wakefield acceleration (LWFA) regime to a plasma wakefield acceleration (PWFA) regime can drive electrons up to energies cl…