A5003016837- Laser-Plasma Interactions and Diagnostics
- Laser-Matter Interactions and Applications
- Laser Design and Applications
- Plasma Diagnostics and Applications
- High-pressure geophysics and materials
- Laser-induced spectroscopy and plasma
- Metal and Thin Film Mechanics
- Dust and Plasma Wave Phenomena
- Solid State Laser Technologies
- Electron and X-Ray Spectroscopy Techniques
- Advanced Fiber Laser Technologies
- Plasma Applications and Diagnostics
- Electrohydrodynamics and Fluid Dynamics
- Space Satellite Systems and Control
- Advanced Semiconductor Detectors and Materials
- Nuclear Physics and Applications
- Advanced Chemical Physics Studies
- Pulsed Power Technology Applications
- Advanced Optical Sensing Technologies
- Atomic and Molecular Physics
The University of Texas at Austin
2005-2020
Peking University
2016
Ludwig-Maximilians-Universität München
2016
We present the design and performance of Texas Petawatt Laser, which produces a 186 J 167 fs pulse based on combination optical parametric chirped amplification (OPCPA) mixed Nd:glass amplification. OPCPA provides majority gain is used to broaden shape seed spectrum, while in accounts for >99% final energy. Compression achieved with highly efficient multilayer dielectric gratings.
Here we present experimental results on laser-driven ion acceleration from relativistically transparent, overdense plasmas in the break-out afterburner (BOA) regime. Experiments were preformed at Trident ultra-high contrast laser facility Los Alamos National Laboratory, and Texas Petawatt facility, located University of Austin. It is shown that when target becomes transparent to laser, an epoch dramatic ions occurs lasts until electron density expanding reduces critical non-relativistic...
The irradiation of few nm thick targets by a finite-contrast high-intensity short-pulse laser results in strong pre-expansion these at the arrival time main pulse. decompress to near and lower than critical densities plasmas extending over micrometers, i.e. multiple wavelengths. interaction pulse with such highly localized but inhomogeneous target leads generation short channel further self-focusing beam. Experiments GHOST system UT Austin using measured non-Maxwellian, peaked electron...
We report on the design and construction of Texas Petawatt Laser. This research facility will consist two, synchronized laser systems that be used for a wide variety high intensity energy density science experiments. The first is novel, (200 J), short pulse (150 fs) petawatt-class based hybrid, broadband optical parametric chirped amplification (OPCPA) mixed silicate phosphate Nd:glass amplification. second provide 500 J at 527 nm (>1 kJ @1053 nm) with widths selectable from 2-20 ns. Design...
Pulsed plasmas have emerged as promising candidates a means for precise control of ion energy/angle dependent surface processes and chemistry during the plasma process, which are key to 3 nm beyond device fabrication. The energy distribution functions (IEDFs) fluxes over pulsed period important understand they directly influence feature profile, damage, selectivity. We developed an advanced diagnostics (APD) system with pulsing capability, including source, bias, synchronous pulsing. It is...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text E. Gaul, M. Martinez, J. Blakeney, Ringuette, D. Hammond, A. Jochmann, R. Escamilla, T. Borger, G. Dyer, and Ditmire, "Activation of a 1.1 Petawatt Hybrid, OPCPA-Nd:glass Laser," in Conference Lasers Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optica Publishing Group, 2009), paper JWB2. Export BibTex Endnote (RIS) HTML Plain...
Abstract Pulsed plasmas are important for the fabrication of nanoscale features. Source biasing is generally associated with control ion to radical flux ratio; how energy distribution function varies over a pulse period also important. In this paper, we experimentally investigate effect transients (i.e. power on off phases) distributions during different RF source duty cycles (99%–20%) in compact inductively coupled argon plasma time average 150 W at frequency 13.56 MHz and pressure 20 mT...
A steady increase of on-target laser intensity with also increasing pulse contrast is leading to light-matter interactions extreme fields matter in new physics regimes. At the Texas Petawatt we have realized transparent-overdense regime, which reached by interacting a highly relativistic, ultra-high solid density ultrathin target. The focus are turning overdense, opaque target transparent relativistic mass electrons. Thus, interaction becomes volumetric, energy coupling from plasma. Using...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text E. Gaul, M. Martinez, J. Blakeney, A. Jochmann, Ringuette, D. Hammond, S. Marijanovic, R. Escamilla, and T. Ditmire, "Demonstration of a 1.1 Petawatt Hybrid OPCPA-Nd:glass Laser," in Advanced Solid-State Photonics, OSA Technical Digest Series (CD) (Optica Publishing Group, 2009), paper WD1. Export BibTex Endnote (RIS) HTML Plain alert Save article
We demonstrated a 1.1 Petawatt Laser (186 J, 167 fs) based on optical parametric chirped pulse amplification (OPCPA) and mixed Nd:glass amplification, which is to our knowledge currently the highest power operating laser.
We report on the 200 J, 150 fs Texas Petawatt Laser. A hybrid amplification with OPCPA in BBO and YCOB crystals mixed glasses is used for broadband gain. Scalability to Exawatt lasers discussed.
The 200 J, 150 fs Texas Petawatt Laser is based on optical parametric chirped pulse amplification (OPCPA) for large, broadband (>35nm) gain (1010) followed by a mixed glass high energy booster stage.
Coherent transition radiation is used to evaluate fast electron transport of a laser-driven relativistic beam in ultrathin targets selected materials. By preheating the with low-intensity laser pulse, bulk resistivity effects on heated and unheated aluminum foils were compared those polyethylene (CH) foils. Unheated showed pinched that was 50% smaller than full-width at half-maximum focal spot. On contrary, it found preheated material Al CH, both materials high resistivity, hot electrons...
Get PDF Email Share with Facebook Tweet This Post on reddit LinkedIn Add to CiteULike Mendeley BibSonomy Citation Copy Text I. Pomerantz, J. Blakeney, G. Dyer, L. Fuller, E. Gaul, D. Gautier, Jung, A. Meadows, R. Shah, C. Wang, Fernandez, T. Ditmire, and B. Hegelich, "Laser Driven Neutron Generation at the Texas Petawatt," in CLEO: 2013, OSA Technical Digest (online) (Optica Publishing Group, 2013), paper QTh3A.4. Export BibTex Endnote (RIS) HTML Plain alert Save article
An all-reflective Ti:Sa power amplifier capable of extracting up to 60 joules has been designed. The consists four passes through a 100mm Ti: Sa crystal realy imaged by off-axis parabolas enclosed in vacuum chamber.
A Petawatt laser based on hybrid optical parametric chirped pulse amplification (OPCPA) and mixed Nd:glass has been demonstrated. This concept enables peak powers which can be scaled significantly beyond one petawatt. Higher power lasers enable access to unprecedented scientific research in the studies of high intensity physics. In this paper we discuss laser, potential scaling higher first experiments. The system starts with a 100 fs pulses centered around 1058 nm from commercial tunable...
Electron-beam sustained plasma (ESP) is a new type of source, in which the generated by an electron beam extracted from second chamber providing source for ESP. The ESP system consists two plasmas separated dielectric inj ector. electron-source by, inductively coupled (ICP), on boundary negative DC voltage applied. main itself, ICP through ector accelerator located inside ICP.