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We propose a new method for laser pulse compression that uses the spatially varying dispersion of a plasma plume with a density gradient. This novel scheme can be used to compress ultrahigh power lasers. A long, negatively…

Since the advent of chirped pulse amplification1 the peak power of lasers has grown dramatically and opened the new branch of high field science, delivering the focused irradiance, electric fields of which drive electrons into the…

The linear threshold condition of the mirror mode including weak drift and finite Larmor radius effects is analysed and shown that it can be given to arbitrary precision in closed analytical form. Combined with observations of mirror modes…

Space Physics · Physics 2009-03-14 R. A. Treumann , O. D. Constantinescu

Following Hawking, it is usual to mimic the effect of collapse space-time geometry on quantum fields in a semi-classical approximation by imposing suitable boundary conditions at the origin of coordinates, which effectively becomes a moving…

High Energy Physics - Theory · Physics 2007-05-23 Frank Wilczek

We propose a new analogue model of gravity - the evolving quark gluon plasma (QGP) produced in relativistic heavy ion collisions. This quark gluon plasma is the "most inviscid" fluid known. Such low kinematic viscosity is believed to…

General Relativity and Quantum Cosmology · Physics 2021-06-08 Arpan Das , Shreyansh S. Dave , Oindrila Ganguly , Ajit M. Srivastava

In this work, we study the shadow of Kerr black hole surrounded by an axisymmetric plasma, whose density takes a Gaussian distribution in the polar direction. Along the radial direction, we consider two models: in model A the density of the…

General Relativity and Quantum Cosmology · Physics 2023-02-01 Zhenyu Zhang , Haopeng Yan , Minyong Guo , Bin Chen

Laser-plasma accelerators offer a compact means of producing high-energy electron beams, but their performance is fundamentally limited by dephasing between the accelerated electrons and the plasma wave. To overcome this limitation, we…

The null geodesics of the regular and rotating magnetically charged black hole in a non-minimally coupled Einstein-Yang-Mills theory surrounded by a plasma medium is studied. The effect of magnetic charge and Yang-Mills parameter on the…

General Relativity and Quantum Cosmology · Physics 2022-07-25 Shubham Kala , Hemwati Nandan , Prateek Sharma

The production of energetic (multi-GeV) heavy ion beams by acceleration of ultra-thin foils through the application of radiation pressure to a self-generated, imperfect plasma mirror (photon absorption probability {\eta} finite) is studied.…

Plasma Physics · Physics 2010-05-26 Carmela Strangio , Angelo Caruso

An observer that is moving towards a high-density region sees, on average, a higher matter density and more foreground-emitting sources ahead than behind themself. Consequently, the average abundance and luminosity of objects producing…

Cosmology and Nongalactic Astrophysics · Physics 2023-10-11 Selim C. Hotinli , Elena Pierpaoli , Simone Ferraro , Kendrick Smith

We discuss an experimental scheme to create a low-dimensional gas of ultracold atoms, based on inelastic bouncing on an evanescent-wave mirror. Close to the turning point of the mirror, the atoms are transferred into an optical dipole trap.…

Quantum Physics · Physics 2009-10-31 R. J. C. Spreeuw , D. Voigt , B. T. Wolschrijn , H. B. van Linden van den Heuvell

Mirror modes in collisionless high-temperature plasmas represent macroscopic high-temperature quasi-superconductors with bouncing electrons in discrete-particle resonance with thermal ion-sound noise contributing to the ion-mode growth…

Plasma Physics · Physics 2021-04-01 R. A. Treumann , Wolfgang Baumjohann

Laser-ablated high-energy-density (HED) plasmas offer a promising route to study astrophysically relevant processes underlying collisionless shock formation, magnetic field amplification, and particle acceleration in the laboratory. Using…

Plasma Physics · Physics 2021-05-26 Anna Grassi , Frederico Fiuza

We investigate particle motion in regular and asymptotically flat black hole spacetimes supported by Dehnen-type dark-matter halos. Two analytic models are analyzed, allowing a systematic study of circular geodesics, photon-sphere…

General Relativity and Quantum Cosmology · Physics 2026-03-25 Bekir Can Lütfüoğlu

If the gravitational lens is surrounded by non-homoheneous plasma, in addition to the vacuum gravitational deflection, chromatic refraction occurs. Also, the speed of signal propagation decreases compared to vacuum. In this article, we…

General Relativity and Quantum Cosmology · Physics 2023-07-12 Gennady S. Bisnovatyi-Kogan , Oleg Yu. Tsupko

A scenario for the enhanced laser-driven ion acceleration from a thin solid target at high laser intensity is considered, where the target is enclosed in a reflecting cavity. The laser pulse reflected from the target is redirected towards…

Plasma Physics · Physics 2013-08-08 Piotr Rączka , Jan Badziak

Local correlation tracking techniques are used to measure proper motions in a series of high angular resolution (~0.1 arcsec) penumbra images. If these motions trace true plasma motions, then we have detected converging flows that arrange…

Astrophysics · Physics 2009-11-13 I. Marquez , J. Sanchez Almeida , J. A. Bonet

The ICM plasma is subject to firehose and mirror instabilities at scales of order the ion Larmor radius. The mirror instability generates fluctuations of magnetic-field strength $\delta B / B \sim 1$. These fluctuations act as magnetic…

High Energy Astrophysical Phenomena · Physics 2016-06-06 S. V. Komarov , E. M. Churazov , M. W. Kunz , A. A. Schekochihin

Frequency-dependent gravitational lens effects are found for trajectories of electromagnetic rays passing through a distribution of plasma near a massive object. Ray propagation through plasma adds extra terms to the equations of motion…

General Relativity and Quantum Cosmology · Physics 2016-11-02 Adam Rogers

Recently, several eclipsing millisecond pulsars have been shown to experience strong and apparent weak lensing from the outflow of their ionized companions. Lensing can be a powerful probe of the ionized plasma, with the strongest lenses…

High Energy Astrophysical Phenomena · Physics 2022-12-07 Fang Xi Lin , Robert Main , Dylan Jow , Dongzi Li , Ue-Li Pen , Marten H. van Kerkwijk