A5077124816- Laser-Matter Interactions and Applications
- Laser-Plasma Interactions and Diagnostics
- Orbital Angular Momentum in Optics
- Laser-induced spectroscopy and plasma
- Advanced X-ray Imaging Techniques
- Atomic and Subatomic Physics Research
- Nuclear physics research studies
- Advanced Fiber Laser Technologies
- Neutrino Physics Research
- Quantum optics and atomic interactions
- Molecular Spectroscopy and Structure
- Magnetic confinement fusion research
- Quantum-Dot Cellular Automata
- Particle Accelerators and Free-Electron Lasers
- Quantum and electron transport phenomena
- Atomic and Molecular Physics
- Particle physics theoretical and experimental studies
- Lattice Boltzmann Simulation Studies
- Quantum Information and Cryptography
- Advanced NMR Techniques and Applications
- Pulsed Power Technology Applications
- Atmospheric and Environmental Gas Dynamics
- Fire effects on ecosystems
- Laser-Ablation Synthesis of Nanoparticles
- Experimental and Theoretical Physics Studies
University of California, Los Angeles
2022-2025
Argonne National Laboratory
2019-2022
University of Chicago
2022
This paper reviews some of the assumptions made and general problems involved in analyzing behavior electron streams coupled to circuits. It explains why a wave approach is used. The propagation constant obtained terms properties stream impedance circuit. Some waves are discussed. importance fitting boundary conditions solution an actual problem discussed, examples, including that “backward-gaining” waves,
Spatiotemporal control refers to a class of optical techniques for structuring laser pulse with coupled spacetime-dependent properties, including moving focal points, dynamic spot sizes, and evolving orbital angular momenta. Here we introduce the concept arbitrarily structured (ASTRL) pulses, which generalizes these techniques. The ASTRL formalism employs superposition prescribed pulses create desired electromagnetic field structure. Several examples illustrate versatility address broad...
A laser beam's peak intensity may be programmed to move at an arbitrary velocity by adjusting the focal time and location of its frequencies, temporal slices, or annuli. Such ``flying focus'' beams show promise in enabling new laser-matter applications. To assess these possibilities, authors analytically describe electromagnetic fields flying-focus pulses with polarization orbital angular momentum.
The electroweak interaction in the standard model is described by a pure vector-axial-vector structure, though any Lorentz-invariant component could contribute. In this Letter, we present most precise measurement of tensor currents low-energy regime examining β-ν[over ¯] correlation trapped ^{8}Li ions with Beta-decay Paul Trap. We find a_{βν}=-0.3325±0.0013_{stat}±0.0019_{syst} at 1σ for case coupling to right-handed neutrinos (C_{T}=-C_{T}^{'}), which consistent prediction.
Numerical modeling of electromagnetic waves is an important tool for understanding the interaction light and matter, lies at core computational electromagnetics. Traditional approaches to injecting evolving waves, however, can be prohibitively expensive complex emerging problems interest restrict comparisons that made between simulation theory. As alternative, we demonstrate incorporated analytically by decomposing physics equations into analytic parts. In particle-in-cell laser–plasma...
Fully relativistic particle-in-cell (PIC) simulations are crucial for advancing our knowledge of plasma physics. Modern supercomputers based on graphics processing units (GPUs) offer the potential to perform PIC unprecedented scale, but require robust and feature-rich codes that can fully leverage their computational resources. In this work, demand is addressed by adding GPU acceleration code Osiris . An overview algorithm, which features a CUDA extension underlying Fortran architecture,...
We propose a new method for self-injection of high-quality electron bunches in the plasma wakefield structure blowout regime utilizing "flying focus" produced by drive beam with an energy chirp. In flying focus speed density centroid bunch can be superluminal or subluminal chromatic dependence focusing optics. first derive focal velocity and characteristic length spot terms then demonstrate using multidimensional particle-in-cell simulations that wake driven superluminally propagating...
Spatiotemporal control encompasses a variety of techniques for producing laser pulses with dynamic intensity peaks that move independently the group velocity. This controlled motion peak offers new approach to optimizing laser-based applications and enhancing signatures fundamental phenomena. Here, we demonstrate spatiotemporal plasma optic. A chirped pulse focused by lens exhibits moving focal point, or “flying focus,” can travel at an arbitrary, predetermined Unlike currently used...
This paper treats propagation of slaw waves in two-dimensional neutralized electron. flow which all electrons have the same velocity direction but there are streams two or more velocities normal to propagation. In a finite beam reflected elastically at boundaries and equal dc currents carried by with transverse
Abstract Laser wakefield accelerators (LWFAs) have electric fields that are orders of magnitude larger than those conventional accelerators, promising an attractive, small-scale alternative for next-generation light sources and lepton colliders. The maximum energy gain in a single-stage LWFA is limited by dephasing, which occurs when the trapped particles outrun accelerating phase wakefield. Here, we demonstrate single space–time structured laser pulse can be used ionization injection...
Extreme ultraviolet (XUV) light sources allow for the probing of bound electron dynamics on attosecond scales, interrogation high-energy-density matter, and access to novel regimes strong-field quantum electrodynamics. Despite importance these applications, coherent XUV remain relatively rare, those that do exist are limited in their peak intensity spatio-polarization structure. Here, we demonstrate photon acceleration an optical vector vortex pulse moving density gradient beam-driven plasma...
An ultrashort flying-focus pulse created by an axiparabola and radial echelon drives a dephasingless laser wakefield accelerator in the bubble regime. Simulations show that 25 pC of ionization-injected electrons gain 2.1 GeV over 20 dephasing lengths (1.3 cm), with projected energy gains 125 <1 m.
The quality of electron beams produced from plasma-based accelerators, i.e., normalized brightness and energy spread, has made transformative progress in the past several decades both simulation experiment. Recently, full-scale particle-in-cell (PIC) simulations have shown that with unprecedented ($10^{20}\sim10^{21}~\mathrm{A}/\mathrm{m}^2/\mathrm{rad}^2$) $0.1\sim 1$ MeV spread can be through controlled injection a slowly expanding bubble arises when particle beam or laser pulse propagates...
Laser wakefield accelerators (LWFAs) have electric fields that are orders of magnitude larger than those conventional accelerators, promising an attractive, small-scale alternative for next-generation light sources and lepton colliders. The maximum energy gain in a single-stage LWFA is limited by dephasing, which occurs when the trapped particles outrun accelerating phase wakefield. Here, we demonstrate single space-time structured laser pulse can be used ionization injection electron...
The framework of Arbitrarily Structured Laser (ASTRL) pulses enables design structured laser which could provide control over the nonlinear optics plasmas. We present examples, including flying focus drivers for wakefield acceleration.
Spatiotemporal control encompasses a variety of techniques for producing laser pulses with dynamic intensity peaks that move independently the group velocity. This controlled motion peak offers new approach to optimizing laser-based applications and enhancing signatures fundamental phenomena. Here, we demonstrate spatiotemporal plasma optic. A chirped pulse focused by lens exhibits moving focal point, or "flying focus," can travel at an arbitrary, predetermined Unlike currently used...
Abstract In a recent paper in this journal (Piddington 1958) the author referring to an earlier of ours (Pierce and Walker 1956) quotes us as saying: “No definitive conclusion can be drawn from it (the steady state analysis) alone.” What we said was: “This relation, dispersion is obviously significant for problem on hand since describes intrinsic property ion stream may, itself, give some valuable information. But no alone about any specific problem, only boundary conditions say what part...
Spatiotemporal control refers to a class of optical techniques for structuring laser pulse with coupled space-time dependent properties, including moving focal points, dynamic spot sizes, and evolving orbital angular momenta. Here we introduce the concept arbitrarily structured (ASTRL) pulses which generalizes these techniques. The ASTRL formalism employs superposition prescribed create desired electromagnetic field structure. Several examples illustrate versatility address range laser-based...