Journal ArticleDOI
Rapid heating of solid density material by a petawatt laser
Roger Evans,Edward B. Clark,R. T. Eagleton,A. M. Dunne,R.D. Edwards,W. J. Garbett,T.J. Goldsack,S.F. James,C.C. Smith,B. R. Thomas,Robert Clarke,David Neely,S. J. Rose +12 more
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TLDR
In this article, time-resolved x-ray spectra from solid targets irradiated by the VULCAN Petawatt laser focused to 1020Wcm−2 show that material at solid density is heated to temperatures above 500 eV to a depth of about 15 μm and for a duration of more than 30 ps.Abstract:
Time-resolved x-ray spectra from solid targets irradiated by the VULCAN Petawatt laser focused to 1020Wcm−2 show that material at solid density is heated to temperatures above 500 eV to a depth of about 15 μm and for a duration of more than 30 ps. Modeling with the implicit hybrid plasma code LSP shows that the heating is sensitive to the laser prepulse through resistive inhibition of the laser accelerated electrons in the blow off layer.read more
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Journal ArticleDOI
Demonstration of a 1.1 petawatt laser based on a hybrid optical parametric chirped pulse amplification/mixed Nd:glass amplifier
Erhard Gaul,Mikael Martinez,Joel Blakeney,A. Jochmann,Martin Ringuette,Doug Hammond,Ted Borger,Ramiro Escamilla,Skylar Douglas,W. Henderson,Gilliss Dyer,Alvin C. Erlandson,R.R. Cross,John A. Caird,Christopher A. Ebbers,Todd Ditmire +15 more
TL;DR: The design and performance of the Texas Petawatt Laser, which produces a 186 J 167 fs pulse based on the combination of optical parametric chirped pulse amplification (OPCPA) and mixed Nd:glass amplification, is presented.
Journal ArticleDOI
Magnetic collimation of fast electrons produced by ultraintense laser irradiation by structuring the target composition
Alexander Robinson,Mark Sherlock +1 more
TL;DR: In this paper, a scheme for collimating fast electrons in a specially engineered solid target is proposed, which is achieved by generating an azimuthal magnetic field as opposed to a radial electric field.
Journal ArticleDOI
Laser-foil acceleration of high-energy protons in small-scale plasma gradients.
Julien Fuchs,C. A. Cecchetti,Marco Borghesi,Thomas Grismayer,Emmanuel d'Humières,Patrizio Antici,Patrizio Antici,Stefano Atzeni,Patrick Mora,A. Pipahl,Lorenzo Romagnani,Angelo Schiavi,Yasuhiko Sentoku,Toma Toncian,P. Audebert,Oswald Willi +15 more
TL;DR: Proton beams laser accelerated from thin foils are studied for various plasma gradients on the foil rear surface and the results show that the jxB mechanism determines the temperature of the electrons driving the ion expansion.
Journal ArticleDOI
Laser absorption by overdense plasmas in the relativistic regime
TL;DR: In this article, a collection of published absorption values obtained in laser-solid experiments and in numerical modelling of laser-plasma interactions is presented, for values of intensity times wavelength squared (Iλ2) greater than 1010 W (1018 W cm−2 µm2).
Journal ArticleDOI
Space and time resolved measurements of the heating of solids to ten million kelvin by a petawatt laser
Motoaki Nakatsutsumi,J. R. Davies,Ryosuke Kodama,James Green,James Green,Kate Lancaster,Kramer Akli,Farhat Beg,Sophia Chen,David C. Clark,Richard R. Freeman,Christopher D. Gregory,Hideaki Habara,R. Heathcote,D. Hey,D. Hey,K. Highbarger,P.A. Jaanimagi,M. H. Key,Karl Krushelnick,Karl Krushelnick,Tammy Ma,Andrew MacPhee,A. J. Mackinnon,Hirotaka Nakamura,Richard B. Stephens,M. Storm,Motonobu Tampo,Motonobu Tampo,Wolfgang Theobald,L. D. Van Woerkom,R. L. Weber,Mingsheng Wei,Nigel Woolsey,Peter Norreys,Peter Norreys +35 more
TL;DR: In this article, the authors used a streak camera to measure optical emission from the opposite side of the target to the laser with a temporal resolution of 17'ps and a spatial resolution of 30'μm, showing that a region 160'm in diameter can be heated to a temperature of ~107'k (kT/e~'keV).
References
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Journal ArticleDOI
Ignition and high gain with ultrapowerful lasers
Max Tabak,James Hammer,Michael E. Glinsky,William L. Kruer,Scott Wilks,John Woodworth,E. Michael Campbell,Michael D. Perry,Rodney J. Mason +8 more
TL;DR: In this article, a capsule is imploded as in the conventional approach to inertial fusion to assemble a high density fuel configuration, and a hole is bored through the capsule corona composed of ablated material, as the critical density is pushed close to the high density core of the capsule by the ponderomotive force associated with high intensity laser light.
Journal ArticleDOI
Energetic heavy-ion and proton generation from ultraintense laser-plasma interactions with solids
E.L. Clark,Karl Krushelnick,Matthew Zepf,Farhat Beg,Michael Tatarakis,A. Machacek,M. I. K. Santala,I. Watts,Peter Norreys,A. E. Dangor +9 more
TL;DR: Observations of proton emission indicate significant structure in the energy spectrum as well as an angular emission profile which varies with energy.
Journal ArticleDOI
Hot electron production and heating by hot electrons in fast ignitor research
M. H. Key,M. D. Cable,Thomas E. Cowan,Kent Estabrook,B. A. Hammel,S. P. Hatchett,E. A. Henry,D. E. Hinkel,J. D. Kilkenny,J. A. Koch,William L. Kruer,A. B. Langdon,Barbara F. Lasinski,Richard W. Lee,B. J. MacGowan,A. J. Mackinnon,J. D. Moody,Michael J. Moran,A. A. Offenberger,Deanna Marie Pennington,Michael D. Perry,T. J. Phillips,T. C. Sangster,M. S. Singh,M. A. Stoyer,Max Tabak,G. L. Tietbohl,M. Tsukamoto,Ken Wharton,Scott Wilks +29 more
TL;DR: In this article, the characteristics of the hot electron source at laser intensities up to 10(to the 20th power) Wcm{sup -2} and the heating produced at depth by hot electrons have been measured.
Journal ArticleDOI
Simulation techniques for heavy ion fusion chamber transport
TL;DR: In this paper, a hybrid implicit algorithm was developed to treat dense plasmas accurately, and simulations of neutralized ballistic transport showed improved transport efficiency for a 4-GeV, 4-kA Pb ion beam by including a 1013 cm−3 plasma at initialization.
Journal ArticleDOI
Fast-electron transport in high-intensity short-pulse laser - solid experiments
TL;DR: In this paper, the authors developed a simple model which shows that in many cases the solid cannot support the required return current and the fast electrons are confined by electric fields to the surface of the target.
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