192 citations · 519 across the 32 of their papers we have counts for
29 papers · 1 filter
Wave drag in moving plasmas: recent developments and prospects
Renaud Gueroult, Aymeric Braud, Julien Langlois
Wave propagation in a medium differs depending on whether this medium is at rest or moving with respect to an observer. Motion can notably lead to modifications of the wave traject…
Light drag in nonuniformly moving anisotropic media through the lens of gradient-index optics
Julien Langlois, Renaud Gueroult
The trajectory of light rays propagating through a nonuniformly moving anisotropic medium is determined by considering the Fresnel drag experienced by the wave at each point along…
Image rotation in plasmas
Renaud Gueroult, Shreekrishna K. Tripathi, Jia Han +3
Because of the speed of light compared to material motion, the dragging of light is difficult to observe under laboratory conditions. Here we report on the first observation of ima…
Ray tracing methods for wave propagation in moving anisotropic media : application to magnetized plasmas
Aymeric Braud, Julien Langlois, Renaud Gueroult
The propagation of a wave in a medium is generally affected when the medium is moving with respect to the observer. Because plasma equilibria often involve plasma flows, for instan…
Fresnel drag in a moving magnetized plasma
Julien Langlois, Aymeric Braud, Renaud Gueroult
The change in direction of the wavevector and group velocity experienced by a wave refracted at the interface of an anisotropic medium in uniform linear motion are determined analy…
Signature of inertia on light dragging in rotating plasmas
Julien Langlois, Renaud Gueroult
The signature of light dragging in a rotating unmagnetized plasma is studied analytically. In contrast with previous work which focused exclusively on the drag effects arising from…
Plasma potential shaping using end-electrodes in the Large Plasma Device
R. Gueroult, S. K. P. Tripathi, F. Gaboriau +2
We perform experiments in the Large Plasma Device (LAPD) at the University of California, Los Angeles, studying how different end-electrode biasing schemes modify the radial potent…
Rotating Alfvén waves in rotating plasmas
J. -M. Rax, R. Gueroult, N. J. Fisch
Angular momentum coupling between a rotating magnetized plasma and torsional Alfvén waves carrying orbital angular momentum (OAM) is examined. It is not only demonstrated that rota…
Contribution of fictitious forces to polarization drag in rotating media
Julien Langlois, Renaud Gueroult
Models for polarization drag - mechanical analog of the Faraday effect - are extended to include inertial corrections to the dielectrics properties of the rotating medium in its re…
Quasilinear theory of Brillouin resonances in rotating magnetized plasmas
J. -M. Rax, R. Gueroult, N. J. Fisch
Both spin and orbital angular momentum can be exchanged between a rotating wave and a rotating magnetized plasma. Through resonances the spin and orbital angular momentum of the wa…
DC electric field generation and distribution in magnetized plasmas
Jean-Marcel Rax, Renaud Gueroult, Nathaniel J. Fisch
Very large DC and AC electric fields cannot be sustained between conducting electrodes because of volume gas breakdown and/or surface field emission. However, very large potential…
Wave propagation in rotating magnetised plasmas
Renaud Gueroult, Jean-Marcel Rax, Nathaniel J. Fisch
Wave propagation properties in a medium are fundamentally affected when this medium is moving instead of at rest. In isotropic dielectric media rotation has two noteworthy contribu…
Trade-off in perpendicular electric field control using negatively biased emissive end-electrodes
B. Trotabas, R. Gueroult
The benefits of thermionic emission from negatively biased electrodes for perpendicular electric field control in a magnetized plasma are examined through its combined effects on t…
Faraday-Fresnel rotation and splitting of orbital angular momentum carrying waves in a rotating plasma
Jean-Marcel Rax, Renaud Gueroult
Rotational Fresnel drag - or orbital Faraday rotation - in a rotating magnetised plasma is uncovered and studied analytically for Trivelpiece-Gould and Whistler-Helicon waves carry…
Energy and momentum conservation upon reflection of a solitary pulse in a bounded magnetized plasma
Renaud Gueroult
When the nature of a magnetosonic pulse propagating in a bounded magnetized plasma slab is successively transformed from compression to rarefaction and vice-versa upon reflection a…
Enhanced Tuneable Rotatory Power in a Rotating Plasma
R. Gueroult, J. -M. Rax, N. J. Fisch
The gyrotropic properties of a rotating magnetized plasma are derived analytically. Mechanical rotation leads to a new cutoff for wave propagation along the magnetic field and pola…
Perspectives on Physics of ExB Discharges Relevant to Plasma Propulsion and Similar Technologies
Igor D. Kaganovich, Andrei Smolyakov, Yevgeny Raitses +22
This paper provides perspectives on recent progress in the understanding of the physics of devices where the external magnetic field is applied perpendicularly to the discharge cur…
A necessary condition for perpendicular electric field control in magnetized plasmas
Renaud Gueroult, Jean-Marcel Rax, Nathaniel J. Fisch
The electrostatic model proposed by Poulos [Phys. Plasmas (2019), , 022104] to describe the electric potential distribution across and along a magnetized plasma column…
Geometric phase in Brillouin flows
Jean-Marcel Rax, Renaud Gueroult
A geometric phase is found to arise from the cyclic adiabatic variation of the crossed magnetic and electric fields which sustain the Brillouin rotation of a plasma column. The exp…
Radial Current and Rotation Profile Tailoring in Highly Ionized Linear Plasma Devices
E. J. Kolmes, I. E. Ochs, M. E. Mlodik +3
In a rotating magnetized plasma cylinder with shear, cross-field current can arise from inertial mechanisms and from the cross-field viscosity. Considering these mechanisms, it is…
Nonlinear Ohmic Dissipation in Axisymmetric DC and RF Driven Rotating Plasmas
J. M. Rax, E. J. Kolmes, I. E. Ochs +2
An axisymmetric fully ionized plasma rotates around its axis when a charge separation between magnetic surfaces is produced from DC fields or RF waves. On each magnetic surface bot…
Cumulative displacement induced by a magnetosonic soliton bouncing in a bounded plasma slab
Renaud Gueroult, Amnon Fructhman, Nathaniel J. Fisch
The passage of a magnetosonic (MS) soliton in a cold plasma leads to the displacement of charged particles in the direction of a compressive pulse and in the opposite direction of…
Opportunities for plasma separation techniques in rare earth elements recycling
Renaud Gueroult, Jean-Marcel Rax, Nathaniel J. Fisch
Rare earth elements recycling has been proposed to alleviate supply risks and market volatility. In this context, the potential of a new recycling pathway, namely plasma mass separ…
Centrifugal instability in the regime of fast rotation
Renaud Gueroult, Jean-Marcel Rax, Nathaniel J. Fisch
Centrifugal instability, which stems from a difference between the azimuthal angular drift velocity of ions and electrons, is studied in the limit of fast rotation for which ions c…