Journal ArticleDOI
Absorption of ultrashort, ultra-intense laser light by solids and overdense plasmas
Scott Wilks,William L. Kruer +1 more
TLDR
In this article, the authors studied absorption mechanisms for ultra-intense (I>10/sup 17/W/cm/sup 2/) laser pulses incident on solids and overdense plasma slabs.Abstract:
Absorption mechanisms for ultra-intense (I>10/sup 17/ W/cm/sup 2/) laser pulses incident on solids and overdense plasma slabs are discussed. We focus on the ultrashort pulse regime, i.e., where the laser pulse length is only a few to perhaps thousands of femtoseconds. Starting from well-known results at low intensity and long pulse length, we begin with absorption mechanisms such as inverse Bremstrahlung and classical resonance absorption and survey several additional absorption mechanisms significant for ultrashort, ultra-intense laser light interacting with overdense plasmas. Estimates for the fraction of laser energy absorbed by various mechanisms are given. It is found that the fraction of energy absorbed by the plasma, and the resulting electron temperatures, can depend considerably on the scale length of the plasma at the critical surface. It is also found that two-dimensional (2-D) effects greatly increase the amount of absorption into hot electrons, over the amount predicted using one-dimensional (1-D) theory. The inclusion of kinetic effects, collisionless absorption, and multidimensional effects are crucial to obtaining a complete picture of the interaction. We also review some of the experimental efforts to understand this complex process of absorption.read more
Citations
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Journal ArticleDOI
Review of laser-driven ion sources and their applications.
TL;DR: The historical background including the early laser-matter interaction studies on energetic ion acceleration relevant to inertial confinement fusion is reviewed and several implemented and proposed mechanisms of proton and/or ion acceleration driven by ultra-short high-intensity lasers are described.
Journal ArticleDOI
Collisionless shocks in laser-produced plasma generate monoenergetic high-energy proton beams
Dan Haberberger,Sergei Tochitsky,Frederico Fiuza,Chao Gong,Ricardo Fonseca,Ricardo Fonseca,Luis O. Silva,Warren Mori,C. Joshi +8 more
TL;DR: Discovery of a laser–plasma acceleration mechanism that generates 20 MeV proton beams with a 1% spread is a promising step in the development of laser-driven proton accelerators.
Journal ArticleDOI
Laser-driven particle and photon beams and some applications
TL;DR: Ledingham and Norreys as mentioned in this paper discussed the potential of laser-driven particle and photon beams and compared them with conventional nuclear accelerator-generated beams in any way and concluded that conventional nuclear accelerators can do more than laser.
Journal ArticleDOI
Laser generation of proton beams for the production of short-lived positron emitting radioisotopes
I. Spencer,Kenneth W. D. Ledingham,Ravi P. Singhal,T. McCanny,Paul McKenna,E.L. Clark,Karl Krushelnick,Matthew Zepf,Farhat Beg,Michael Tatarakis,A. E. Dangor,Peter Norreys,R.J. Clarke,Ric M. Allott,I. Ross +14 more
TL;DR: In this article, the possibility of using ultra-intenseense lasers to produce commercial amounts of short-lived positron emitting sources for positron emission tomography (PET) is discussed.
Journal ArticleDOI
Particle in cell simulation of laser-accelerated proton beams for radiation therapy.
E. Fourkal,E. Fourkal,B. Shahine,M. Ding,M. Ding,J. S. Li,J. S. Li,Toshiki Tajima,C.-M. Ma,C.-M. Ma +9 more
TL;DR: It is shown that under optimal interaction conditions protons can be accelerated up to relativistic energies of 300 MeV by a petawatt laser field.
References
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Journal ArticleDOI
Compression of amplified chirped optical pulses
Donna Strickland,Gerard Mourou +1 more
TL;DR: In this paper, the amplification and subsequent recompression of optical chirped pulses were demonstrated using a system which produces 1.06 μm laser pulses with pulse widths of 2 ps and energies at the millijoule level.
Journal ArticleDOI
Absorption of ultra-intense laser pulses.
TL;DR: In this article, the interaction of ultra-intensemble laser pulses with a plasma was investigated and substantial absorption into heated electrons with a characteristic temperature of order the pondermotive potential was found.
Journal Article
The physics of laser plasma interactions
TL;DR: Kruer as mentioned in this paper provides a concise overview and a physically-motivated treatment of the major plasma processes which determine the interaction of intense light waves with plasmas, and also includes a discussion of basic plasma concepts, plasma simulation using particle codes, and laser plasma experiments.
Journal ArticleDOI
Not-so-resonant, resonant absorption.
TL;DR: When an intense electromagnetic wave is incident obliquely on a sharply bounded overdense plasma, strong energy absorption can be accounted for by the electrons that are dragged into the vacuum and sent back into the plasma with velocities vapprox.
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