Geometrical Optics of Dense Aerosols: Forming Dense Plasma Slabs

Hay, Michael J.; Valeo, E. J.; Fisch, Nathaniel J.

doi:10.1103/physrevlett.111.188301

Cited by 5 publications

(5 citation statements)

References 9 publications

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“…In a plasma with statistically uniform inhomogeneities of the refractive index, satisfying the condition (11), the pulse can propagate, staying statistically uniform in the transverse directions and paraxial, a significantly larger distance L 2 SF /λ ∼ 30 m. The plasma concentration in this example is n ∼ 2 × 10 19 cm −3 . Such plasmas might be produced by ionization of dense aerosols [22,23]. The droplet size can be as small as a few microns.…”

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confidence: 99%

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Malkin

Fisch

2016

Phys. Rev. Lett.

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Powerful incoherent laser pulses can propagate in focusing Kerr media much longer distances than can coherent pulses, due to the fast phase mixing that prevents transverse filamentation. This distance is limited by 4-wave scattering, which accumulates waves at small transverse wavenumbers, where phase mixing is too slow to retain the incoherence and thus prevent the filamentation. However, we identify how this theoretical limit can be overcome by countering this accumulation through transverse heating of the pulse by random fluctuations of the refractive index. In these new regimes, the laser pulse propagation distances are significantly extended, making feasible a new class of random lasers, in particular, ultra-powerful random lasers in plasmas.

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confidence: 99%

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Malkin

Fisch

2016

Phys. Rev. Lett.

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“…The plasma density required to compress 1µm pulses using unmagnetized plasmas is ∼ 10 19 cm −3 , which is already at the verge of the feasibility of gas jet plasmas. To compress shorter wavelength lasers using unmagnetized plasmas, denser plasma targets, such as foams and aerosol jets 52 , remain to be developed. Allowing the requirement for dense plasmas to be replaced by magnetic fields thus relaxes the engineering challenges.…”

Section: A Mediation By Upper-hybrid Wavementioning

confidence: 99%

Laser-plasma interactions in magnetized environment

2018

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Propagation and scattering of lasers present new phenomena and applications when the plasma medium becomes strongly magnetized. With mega-Gauss magnetic fields, scattering of optical lasers already becomes manifestly anisotropic. Special angles exist where coherent laser scattering is either enhanced or suppressed, as we demonstrate using a cold-fluid model. Consequently, by aiming laser beams at special angles, one may be able to optimize laser-plasma coupling in magnetized implosion experiments. In addition, magnetized scattering can be exploited to improve the performance of plasma-based laser pulse amplifiers. Using the magnetic field as an extra control variable, it is possible to produce optical pulses of higher intensity, as well as compress UV and soft x-ray pulses beyond the reach of other methods. In even stronger giga-Gauss magnetic fields, laser-plasma interactions begin to enter the relativistic-quantum regime. Using quantum electrodynamics, we compute modified wave dispersion relation, which enables correct interpretation of Faraday rotation measurements of strong magnetic fields.

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“…Moreover, in order to compress lasers of higher frequency or intensity, plasmas of higher density and temperature are required, for which no technology is currently available. To produce plasma targets with density higher than ∼ 10 20 cm −3 , a method using dense aerosol jet has been envisioned (Hay et al, 2013;Ruiz et al, 2014). However, reaching high temperature and sufficient uniformity with these targets is considerably more challenging and is yet to be demonstrated experimentally.…”

Section: Unmagnetized Raman and Brillouin Compressionsmentioning

confidence: 99%

Plasma Physics in Strong Field Regimes

Yuan¹

2018

Preprint

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In strong electromagnetic fields, new plasma phenomena and applications emerge, whose modeling requires analytical theories and numerical schemes that I will develop in this thesis. Based on my new results of the classical plasma model, the role of strong magnetic fields during laser-plasma interactions can now be understood. Moreover, based my new quantum electrodynamics (QED) models for plasmas, it is now possible to understand strong-field QED effects in astrophysical environments and test them in laboratory settings.First and foremost, I would like to extend thanks to my advisors Nathaniel J. Fisch and Hong Qin. I am deeply indebted to Nat and Hong, not only for advising and guiding me in research and teaching, but also for encouraging me to explore other branches of physics. Their open-mindedness enabled me to find synergy between quantum field theory and plasma physics, and do research on topics that are unimaginable anywhere else in the world. I am forever thankful for the excellent role models they have provided as successful physicists, professors, and mentors. I am deeply grateful for my collaborators Qing Jia, who carried out simulations of magnetized laser pulse compression, and Jianyuan Xiao, who coded and performed simulations of scalar-QED plasmas. It has been a privilege to work with such a talented peer group. Discussions with Qing, Jianyuan, as well as Matthew Edwards, Kenan Qu, Sebastian Meuren, and Wolf Malkin have always been inspiring and fruitful.For this dissertation, I would like to acknowledge my readers, Ilya Dodin and Edward Startsev, for their time and constructive feedbacks. I am thankful to members of my thesis committee: Ilya Dodin, Allan Reiman and Julia Mikhailova for their time, guidance, and insightful questions.Many people have read the work presented in this dissertation and generously provided valuable comments. I would like to extend my sincere thanks to

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Geometrical Optics of Dense Aerosols: Forming Dense Plasma Slabs

Cited by 5 publications

References 9 publications

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Extended Propagation of Powerful Laser Pulses in Focusing Kerr Media

Laser-plasma interactions in magnetized environment

Plasma Physics in Strong Field Regimes

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