205 citations · 669 across the 26 of their papers we have counts for
20 papers · 1 filter
Towards continuum gyrokinetic study of high-field mirrors
Manaure Francisquez, Maxwell H. Rosen, Noah R. Mandell +3
High-temperature superconducting (HTS) magnetic mirrors under development exploit strong fields with high mirror ratio to compress loss cones and enhance confinement, and may offer…
Regulation of the Normalized Rate of Driven Magnetic Reconnection through Shocked Flux Pileup
J. Olson, J. Egedal, M. Clark +7
Magnetic reconnection is explored on the Terrestrial Reconnection Experiment (TREX) for asymmetric inflow conditions and in a configuration where the absolute rate of reconnection…
Laminar and Turbulent Plasmoid Ejection in a Laboratory Parker Spiral Current Sheet
Ethan E. Peterson, Douglass A. Endrizzi, Michael Clark +8
Quasi-periodic plasmoid formation at the tip of magnetic streamer structures is observed to occur in experiments on the Big Red Ball as well as in simulations of these experiments…
Weakly magnetized, Hall dominated plasma Couette flow
K. Flanagan, J. Milhone, J. Egedal +5
A novel plasma equilibrium in the high-, Hall regime that produces centrally-peaked, high Mach number Couette flow is described. Flow is driven using a weak, uniform magnetic fi…
Major Scientific Challenges and Opportunities in Understanding Magnetic Reconnection and Related Explosive Phenomena throughout the Universe
H. Ji, A. Alt, S. Antiochos +97
This white paper summarizes major scientific challenges and opportunities in understanding magnetic reconnection and related explosive phenomena as a fundamental plasma process.
On the temperature of the solar wind
Stanislav Boldyrev, Cary Forest, Jan Egedal
Solar wind provides an example of a weakly collisional plasma expanding from a thermal source in the presence of spatially diverging magnetic field lines. Observations show that in…
[Plasma 2020 Decadal] The Material Properties of Weakly Collisional, High-Beta Plasmas
M. W. Kunz, J. Squire, S. A. Balbus +14
This white paper, submitted for the Plasma 2020 Decadal Survey, concerns the physics of weakly collisional, high-beta plasmas -- plasmas in which the thermal pressure dominates ove…
Laboratory evidence of dynamo amplification of magnetic fields in a turbulent plasma
P. Tzeferacos, A. Rigby, A. Bott +27
Magnetic fields are ubiquitous in the Universe. Extragalactic disks, halos and clusters have consistently been shown, via diffuse radio-synchrotron emission and Faraday rotation me…
The Wisconsin Plasma Astrophysics Laboratory
C. B. Forest, K. Flanagan, M. Brookhart +21
The Wisconsin Plasma Astrophysics Laboratory (WiPAL) is a flexible user facility designed to study a range of astrophysically relevant plasma processes as well as novel geometries…
Prospects for observing the magnetorotational instability in the Plasma Couette Experiment
K. Flanagan, M. Clark, C. Collins +4
Many astrophysical disks, such as protoplanetary disks, are in a regime where non-ideal, plasma-specific magnetohydrodynamic (MHD) effects can significantly influence the behavior…
Taylor-Couette Flow of Unmagnetized Plasma
C. Collins, M. Clark, C. M. Cooper +6
Differentially rotating flows of unmagnetized, highly conducting plasmas have been created in the Plasma Couette Experiment. Previously, hot-cathodes have been used to control plas…
Fast dynamos in spherical boundary-driven flows
I. V. Khalzov, C. M. Cooper, C. B. Forest
We numerically demonstrate the feasibility of kinematic fast dynamos for a class of time-periodic axisymmetric flows of conducting fluid confined inside a sphere. The novelty of ou…
Optimized boundary driven flows for dynamos in a sphere
I. V. Khalzov, B. P. Brown, C. M. Cooper +2
We perform numerical optimization of the axisymmetric flows in a sphere to minimize the critical magnetic Reynolds number Rm_cr required for dynamo onset. The optimization is done…
Stirring Unmagnetized Plasma
C. Collins, N. Katz, J. Wallace +4
A new concept for spinning unmagnetized plasma is demonstrated experimentally. Plasma is confined by an axisymmetric multi-cusp magnetic field and biased cathodes are used to drive…
Modeling the Parker instability in a rotating plasma screw pinch
I. V. Khalzov, B. P. Brown, N. Katz +1
We analytically and numerically study the analogue of the Parker (magnetic buoyancy) instability in a uniformly rotating plasma screw pinch confined in a cylinder. Uniform plasma r…
Turbulent Diamagnetism in Flowing Liquid Sodium
E. J. Spence, M. D. Nornberg, C. M. Jacobson +4
The nature of Ohm's law is examined in a turbulent flow of liquid sodium. A magnetic field is applied to the flowing sodium, and the resulting magnetic field is measured. The mean…
Intermittent magnetic field excitation by a turbulent flow of liquid sodium
M. D. Nornberg, E. J. Spence, R. D. Kendrick +2
The magnetic field measured in the Madison Dynamo Experiment shows intermittent periods of growth when an axial magnetic field is applied. The geometry of the intermittent field is…
Numerical simulations of current generation and dynamo excitation in a mechanically-forced, turbulent flow
R. A. Bayliss, C. B. Forest, M. D. Nornberg +2
The role of turbulence in current generation and self-excitation of magnetic fields has been studied in the geometry of a mechanically driven, spherical dynamo experiment, using a…
Observation of a Turbulence-Induced Large Scale Magnetic Field
E. J. Spence, M. D. Nornberg, C. M. Jacobson +2
An axisymmetric magnetic field is applied to a spherical, turbulent flow of liquid sodium. An induced magnetic dipole moment is measured which cannot be generated by the interactio…
Measurements of the magnetic field induced by a turbulent flow of liquid metal
M. D. Nornberg, E. J. Spence, R. D. Kendrick +2
Initial results from the Madison Dynamo Experiment provide details of the inductive response of a turbulent flow of liquid sodium to an applied magnetic field. The magnetic field s…