20 citations · 60 across the 17 of their papers we have counts for
17 papers
Laser ion acceleration from concave targets by subpicosecond pulses
K. V. Lezhnin, V. Ospina-Bohórquez, J. Griff-McMahon +6
Laser-driven proton acceleration provides a powerful route for generating ultrashort, high-charge proton beams. Many applications, including secondary neutron sources and inertial…
Evolution of laser-driven magnetic fields from proton tomography
J. Griff-McMahon, V. Valenzuela-Villaseca, C. A. Walsh +9
Self-generated magnetic fields are commonly produced in high-power laser-plasma interactions. These fields can inhibit plasma heat-flow which makes them important in inertial fusio…
Geometric scaling of laser-driven proton focusing from hemispherical foils
Jesse Griff-McMahon, Xavier Vaisseau, William Fox +7
We systematically characterize the focusing behavior of laser-driven proton beams from hemispherical targets of various diameters using mesh radiography. The proton focal location…
Structure of self-generated magnetic fields in laser-solid interaction from proton tomography
Jesse Griff-McMahon, Christopher A. Walsh, Vicente Valenzuela-Villaseca +9
Strong magnetic fields are naturally self-generated in high-power, laser-solid interactions through the Biermann-battery mechanism. This work experimentally characterizes the 3D lo…
Laboratory measurements of energy partitioning and anomalous electron heating in magnetized, perpendicular collisionless shocks
V. Valenzuela-Villaseca, S. Totorica, J. Griff-McMahon +6
We present laboratory results on energy partitioning from supercritical, magnetized collisionless shock experiments (, ). We report the first ob…
Reconstruction of 2D line-integrated electron density using angular filter refractometry and a fast marching Eikonal solver
Brendan McCluskey, Jesse Griff-McMahon, Daniel Haberberger +3
Refraction of an optical probe beam by a plasma can be measured with angular filter refractometry (AFR), which produces an image containing intensity contours that correspond to cu…
Record Magnetic Field Generation by Short-Pulse Laser-Driven Capacitor-Coil Targets
Lan Gao, Yang Zhang, Hantao Ji +6
Magnetic fields generated by capacitor-coil targets driven by intense short-pulse lasers have been characterized using ultrafast proton radiography. A 1-kJ, 15-ps laser at a center…
Diagnosing electric and magnetic fields in laser-driven coil targets
Yang Zhang, Lan Gao, Hantao Ji +6
Laser-driven capacitor coils are widely used to generate intense magnetic fields for various applications in high-energy-density physics research. Accurate measurement of the magne…
Expansion-Driven Self-Magnetization of High-Energy-Density Plasmas
K. V. Lezhnin, S. R. Totorica, J. Griff-McMahon +4
Understanding plasma self-magnetization is one of the fundamental challenges in both laboratory and astrophysical plasmas. Self-magnetization can modify the plasma transport proper…
Particle-in-cell simulations of expanding high energy density plasmas with laser ray tracing
K. V. Lezhnin, S. R. Totorica, A. S. Hyder +5
The design and analysis of high energy density (HED) laser experiments typically rely on radiation hydrodynamics simulations. However, some laser-plasma interaction regimes are not…
Proton Radiography Inversions with Source Extraction and Comparison to Mesh Methods
J. Griff-McMahon, V. Valenzuela-Villaseca, S. Malko +4
Proton radiography is a central diagnostic technique for measuring electromagnetic (EM) fields in high-energy-density, laser-produced plasmas. In this technique, protons traverse t…
X-ray imaging and electron temperature evolution in laser-driven magnetic reconnection experiments at the National Ignition Facility
V. Valenzuela-Villaseca, J. M. Molina, D. B. Schaeffer +13
We present results from X-ray imaging of high-aspect-ratio magnetic reconnection experiments driven at the National Ignition Facility. Two parallel, self-magnetized, elongated lase…
Greater than five-order-of-magnitude post-compression temporal contrast improvement with an ionization plasma grating
Matthew R. Edwards, Nicholas M. Fasano, Andreas M. Giakas +7
High-intensity lasers require suppression of prepulses and other non-ideal temporal structure to avoid target disruption before the arrival of the main pulse. To address this, we d…
Measurements of Extended Magnetic Fields in Laser-Solid Interaction
J. Griff-McMahon, S. Malko, V. Valenzuela-Villaseca +5
Magnetic fields generated from a laser-foil interaction are measured with high fidelity using a proton radiography scheme with in situ x-ray fiducials. In contrast to prior finding…
Proton deflectometry analysis in magnetized plasmas: magnetic field reconstruction in one dimension
W. Fox, G. Fiksel, D. B. Schaeffer +1
Proton deflectometry is increasingly used in magnetized high-energy-density plasmas to observe electromagnetic fields. We describe a reconstruction algorithm to recover the electro…
Atmospheric aerosol clearing by femtosecond filaments
A. Goffin, J. Griff-McMahon, I. Larkin +1
Atmospheric aerosols, such as water droplets in fog, interfere with laser propagation through scattering and absorption. Femtosecond optical filaments have been shown to clear fogg…
Full path single-shot imaging of femtosecond pulse collapse in air turbulence
I. Larkin, J. Griff-McMahon, A. Schweinsberg +3
In a single shot, we measure the full propagation path, including the evolution to pulse collapse, of a high power femtosecond laser pulse propagating in air. This technique enable…