A5015859182- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Particle accelerators and beam dynamics
- Laser-induced spectroscopy and plasma
- Laser-Matter Interactions and Applications
- Magnetic confinement fusion research
- Laser Design and Applications
- Plasma Diagnostics and Applications
- Gyrotron and Vacuum Electronics Research
- Pulsed Power Technology Applications
- Superconducting Materials and Applications
- Advanced X-ray Imaging Techniques
- Atomic and Molecular Physics
- Distributed and Parallel Computing Systems
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Advanced Data Storage Technologies
- Photocathodes and Microchannel Plates
- Scientific Computing and Data Management
- Advanced Surface Polishing Techniques
- High-Energy Particle Collisions Research
- Muon and positron interactions and applications
- Particle physics theoretical and experimental studies
- Ion-surface interactions and analysis
- Cold Atom Physics and Bose-Einstein Condensates
RadiaSoft (United States)
2014-2023
University of Central Florida
2023
RadiaBeam Technologies (United States)
2015-2016
Tech-X Corporation (United States)
2005-2014
University of Colorado Boulder
1989-2014
Tech-X (United Kingdom)
2007-2014
University of Colorado System
2009-2013
Lawrence Berkeley National Laboratory
2005-2010
University of Nevada, Reno
2008-2009
École Polytechnique
2009
Beam-driven plasma wakefield acceleration using low-ionization-threshold gas such as Li is combined with laser-controlled electron injection via ionization of high-ionization-threshold He. The He electrons are released low transverse momentum in the focus copropagating, nonrelativistic-intensity laser pulse directly inside accelerating or focusing phase blowout. This concept paves way for generation sub-$\ensuremath{\mu}\mathrm{m}$-size, ultralow-emittance, highly tunable bunches, thus...
The Integrable Optics Test Accelerator (IOTA) is a storage ring for advanced beam physics research currently being built and commissioned at Fermilab. It will operate with protons electrons using injectors momenta of 70 150 MeV/c, respectively. program includes the study nonlinear focusing integrable optical lattices based on special magnets electron lenses, dynamics space-charge effects their compensation, stochastic cooling, several other experiments. In this article, we present design...
Abstract Plasma photocathode wakefield acceleration combines energy gains of tens GeV m −1 with generation ultralow emittance electron bunches, and opens a path towards 5D-brightness orders magnitude larger than state-of-the-art. This holds great promise for compact accelerator building blocks advanced light sources. However, an intrinsic by-product the enormous electric field gradients inherent to plasma accelerators is substantial correlated spread—an obstacle key applications such as...
Plasma-based accelerators can sustain accelerating gradients on the order of 100 GV/m. If plasma is not fully ionized, fields this magnitude will ionize neutral atoms via electron tunneling, which completely change dynamics wake. Particle-in-cell simulations a high-field wakefield accelerator, using OOPIC code [D. L. Bruhwiler et al., Phys. Rev. ST Accel. Beams 4, 101302 (2001)], includes field-induced tunneling ionization Li gas, show that presence even moderate gas density significantly...
We present 2D simulations of both beam-driven and laser-driven plasma wakefield accelerators, using the object-oriented particle-in-cell code XOOPIC, which is time explicit, fully electromagnetic, capable running on massively parallel supercomputers. Simulations wakefields with low $\(\ensuremath{\sim}{10}^{16}\mathrm{W}/{\mathrm{cm}}^{2}\)$ high $\(\ensuremath{\sim}{10}^{18}\mathrm{W}/{\mathrm{cm}}^{2}\)$ peak intensity laser pulses are conducted in slab geometry, showing agreement theory...
Stable operation of a laser-plasma accelerator near the threshold for electron self-injection in blowout regime has been demonstrated with 25--60 TW, 30 fs laser pulses focused into 3--4 millimeter length gas jet. Nearly Gaussian shape and high nanosecond contrast pulse appear to be critically important controllable, tunable generation 250--430 MeV bunches low-energy spread, $\ensuremath{\sim}10\text{ }\text{ }\mathrm{pC}$ charge, few-mrad divergence pointing stability, vanishingly small...
The production of high spectral brilliance radiation from electron beam sources depends critically on the qualities. One must obtain very brightness, implying simultaneous peak current and low emittance. These attributes are enabled through use field acceleration in a radio-frequency (rf) photoinjector source. Despite fields currently utilized, there is limit achievable brightness operation, range tens Ampere. This limitation can be overcome by hybrid standing wave/traveling wave structure;...
Abstract Laser-plasma accelerators are capable of sustaining accelerating fields 10–100 GeV/m, 100–1000 times that conventional technology and the highest produced by any widely researched advanced accelerator concepts. also intrinsically accelerate short particle bunches, several orders magnitude shorter than technology, which leads to reductions in beamstrahlung and, hence, savings overall power consumption reach a desired luminosity. These properties make laser-plasma promising for more...
High-quality electron beams, with a few 109 electrons within percent of the same energy above 80 MeV, were produced in laser wakefield accelerator by matching acceleration length to over which accelerated and outran (dephased from) wake. A plasma channel guided drive long distances, resulting production high-energy, high-quality beams. Unchanneled experiments varying target indicated that bunches are near dephasing demonstrated guiding was more stable efficient than relativistic...
We describe a modification to the finite-difference time-domain algorithm for electromagnetics on Cartesian grid which eliminates numerical dispersion error in vacuum waves propagating along axis. provide details of algorithm, generalizes previous work by allowing 3D operation with wide choice aspect ratio, and give conditions eliminate dispersive errors one or more coordinate axes. discuss context laser-plasma acceleration simulation, showing significant reduction---up factor 280, at plasma...
Abstract Large scale laser facilities are needed to advance the energy frontier in high physics and accelerator physics. Laser plasma accelerators core advanced concepts aimed at reaching TeV electron colliders. In these facilities, intense pulses drive plasmas used accelerate electrons energies remarkably short distances. A could principle reach with an accelerating length that is 1000 times shorter than conventional RF based accelerators. Notionally, driven particle beam beyond state of...
A novel, flexible method of witness electron bunch generation in plasma wakefield accelerators is described. quasistationary region ignited by a focused laser pulse prior to the arrival wave. This localized, shapeable optical torch causes strong distortion blowout during passage driver bunch, leading collective alteration trajectories and controlled injection. optically steered injection more faster when compared hydrodynamically gas density transition methods.Received 27 February...
A method to inject electron beams with controllable transverse emittances in a laser-plasma accelerators is proposed and analyzed. It uses two colliding laser pulses that propagate transversely the plasma wave. For equal frequencies, beam very low emittance generated when collision close density peak of Electrons near axis are accelerated longitudinally by ponderomotive force pulses, beat wave, subsequently injected into second bucket wake. Ionization used increase injection area final...
The dynamics of laser ionization-based electron injection in the recently introduced plasma photocathode concept is analyzed analytically and with particle-in-cell simulations. influence initial few-cycle pulse that liberates electrons through background gas ionization a wakefield accelerator on final phase space described use Ammosov-Deloine-Krainov theory as well nonadiabatic Yudin-Ivanov (YI) subsequent downstream combined wave fields. photoelectrons are tracked by solving their...
We report experimental measurements of narrow-band, single-mode excitation, and drive beam energy modulation, in a dielectric wakefield accelerating structure with planar geometry Bragg-reflector boundaries. A short, relativistic electron ($\ensuremath{\sim}1\text{ }\text{ }\mathrm{ps}$) moderate charge ($\ensuremath{\sim}100\text{ }\mathrm{pC}$) is used to the wakefields structure. The fundamental mode reinforced by constructive interference alternating layers at boundary, characterized...
Electron self-injection and acceleration until dephasing in the blowout regime is studied for a set of initial conditions typical recent experiments with 100 terawatt-class lasers. Two different approaches to computationally efficient, fully explicit, three-dimensional particle-in-cell modelling are examined. First, Cartesian code VORPAL using perfect-dispersion electromagnetic solver precisely describes laser pulse bubble dynamics, taking advantage coarser resolution propagation direction,...
Spiking electron beam driven plasma waves with novel laser-driven underdense photocathodes can produce witness bunches extreme brightness. The development of such hybrid systems and their potential as future plasma-based accelerators compact yet high performance light sources is discussed.
Sirepo , a browser-based GUI for X-ray source and optics simulations, is presented. Such calculations can be performed using SRW ( Synchrotron Radiation Workshop ), which physical computer code, allowing simulation of entire experimental beamlines the concept `virtual beamline' with accurate treatment synchrotron radiation generation propagation through optical system. interfaced by means Python application programming interface. supports most elements currently used at beamlines, including...
Laser- and particle beam-driven plasma wakefield accelerators produce accelerating fields thousands of times higher than radio-frequency accelerators, offering compactness ultrafast bunches to extend the frontiers high energy physics enable laboratory-scale radiation sources. Large-scale kinetic simulations provide essential understanding accelerator advance beam performance stability show predict behind recent demonstration narrow spread bunches. Benchmarking between codes is establishing...