Weakly Magnetized, Hall Dominated Plasma Couette Flow

Flanagan, K.; Milhone, J.; Egedal, J.; Endrizzi, D.; Olson, J.; Peterson, E. E.; Sassella, R.; Forest, C. B.

doi:10.7910/DVN/LQGHVN

Title: Weakly Magnetized, Hall Dominated Plasma Couette Flow

Dataset
Other Related Research

Abstract

A novel plasma equilibrium in the high-β, Hall regime that produces centrally-peaked, high Mach number Couette flow is described. Flow is driven using a weak, uniform magnetic field and large, cross field currents. Large magnetic field amplification (factor 20) due to the Hall effect is observed when electrons are flowing radially inward, and near perfect field expulsion is observed when the flow is reversed. A dynamic equilibrium is reached between the amplified (removed) field and extended density gradients.

Authors:

Flanagan, K.; Milhone, J.; Egedal, J.; Endrizzi, D.; Olson, J.; Peterson, E. E.; Sassella, R.; Forest, C. B.

OSTI

Publication Date:: Tue Jun 21 04:00:00 UTC 2022

DOE Contract Number:: SC0018266

Research Org.:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

OSTI Identifier:: 1889421

DOI:: https://doi.org/10.7910/DVN/LQGHVN

Citation Formats


                    Flanagan, K., Milhone, J., Egedal, J., Endrizzi, D., Olson, J., Peterson, E. E., Sassella, R., and Forest, C. B. Weakly Magnetized, Hall Dominated Plasma Couette Flow.  United States: N. p., 2022. 
        Web.  doi:10.7910/DVN/LQGHVN.

Copy to clipboard


                    Flanagan, K., Milhone, J., Egedal, J., Endrizzi, D., Olson, J., Peterson, E. E., Sassella, R., & Forest, C. B. Weakly Magnetized, Hall Dominated Plasma Couette Flow.  United States.  doi:https://doi.org/10.7910/DVN/LQGHVN

Copy to clipboard


                    Flanagan, K., Milhone, J., Egedal, J., Endrizzi, D., Olson, J., Peterson, E. E., Sassella, R., and Forest, C. B. 2022.  
"Weakly Magnetized, Hall Dominated Plasma Couette Flow".  United States.  doi:https://doi.org/10.7910/DVN/LQGHVN.  https://www.osti.gov/servlets/purl/1889421. Pub date:Tue Jun 21 04:00:00 UTC 2022

Copy to clipboard


                    
@article{osti_1889421,

  title        = {Weakly Magnetized, Hall Dominated Plasma Couette Flow},

  author       = {Flanagan, K. and Milhone, J. and Egedal, J. and Endrizzi, D. and Olson, J. and Peterson, E. E. and Sassella, R. and Forest, C. B.},

  abstractNote = {A novel plasma equilibrium in the high-β, Hall regime that produces centrally-peaked, high Mach number Couette flow is described. Flow is driven using a weak, uniform magnetic field and large, cross field currents. Large magnetic field amplification (factor 20) due to the Hall effect is observed when electrons are flowing radially inward, and near perfect field expulsion is observed when the flow is reversed. A dynamic equilibrium is reached between the amplified (removed) field and extended density gradients.},

  doi          = {10.7910/DVN/LQGHVN},

  journal      = {},

  number       = ,

  volume       = ,

  place        = {United States},

  year         = {Tue Jun 21 04:00:00 UTC 2022},

  month        = {Tue Jun 21 04:00:00 UTC 2022}

}

Copy to clipboard

Dataset:

View Dataset

DOI: https://doi.org/10.7910/DVN/LQGHVN

Save / Share:

Export Metadata

Save to My Library

Similar records in DOE Data Explorer and OSTI.GOV collections:

Weakly Magnetized, Hall Dominated Plasma Couette Flow

Journal Article Flanagan, K. ; Milhone, J. ; Egedal, J. ; ... - Physical Review Letters

A novel plasma equilibrium in the high-β, Hall regime that produces centrally peaked, high Mach number Couette flow is described. Flow is driven using a weak, uniform magnetic field and large, cross field currents. Large magnetic field amplification (factor 20) due to the Hall effect is observed when electrons are flowing radially inward, and near perfect field expulsion is observed when the flow is reversed. In conclusion, a dynamic equilibrium is reached between the amplified (removed) field and extended density gradients.
Interactions of magnetized plasma flows in pulsed-power driven experiments

Dataset Suttle, L. G. ; Burdiak, G. C. ; Cheung, C. L. ; ...

A supersonic flow of magnetized plasma is produced by the application of a 1 MA-peak, 500 ns current pulse to a cylindrical arrangement of parallel wires, known as an inverse wire array. The plasma flow is produced by the J x B acceleration of the ablated wire material, and a magnetic field of several Tesla is embedded at source by the driving current. This setup has been used for a variety of experiments investigating the interactions of magnetized plasma flows. In experiments designed to investigate magnetic reconnection, the collision of counter-streaming flows, carrying oppositely directed magnetic fields, leads to themore »« less
Collisional alpha transport in a weakly rippled magnetic field

Dataset Catto, Peter J.

To properly treat the collisional transport of alpha particles due to a weakly rippled tokamak magnetic field the tangential magnetic drift due to its gradient (the ∇B drift) and pitch angle scatter must be retained. Their combination gives rise to a narrow boundary layer in which collisions are able to match the finite trapped response to the ripple to the vanishing passing response of the alphas. Away from this boundary layer collisions are ineffective. There the much stronger ∇B drift of the alphas easily balances the small radial drift of the trapped alphas caused by the ripple. As this balancemore »« less
Collisionless Shocks Driven by Supersonic Plasma Flows with Self-Generated Magnetic Fields

Dataset Li, C. K. ; Tikhonchuk, V. T. ; Moreno, Q. ; ...

Collisionless shocks are ubiquitous in the Universe as a consequence of supersonic plasma flows sweeping through interstellar and intergalactic media. These shocks are the cause of many observed astrophysical phenomena, but details of shock structure and behavior remain controversial because of the lack of ways to study them experimentally. Laboratory experiments reported here, with astrophysically relevant plasma parameters, demonstrate for the first time the formation of a quasiperpendicular magnetized collisionless shock. In the upstream it is fringed by a filamented turbulent region, a rudiment for a secondary Weibel-driven shock. This turbulent structure is found responsible for electron acceleration to energiesmore »« less
Collisional alpha transport in a weakly non-quasisymmetric stellarator magnetic field

Dataset Catto, Peter J.

Alpha particle confinement is a serious concern in stellarators and provides strong motivation for optimizing magnetic field configurations. In addition to the collisionless confinement of trapped alphas in stellarators, excessive collisional transport of the trapped alpha particles must be avoided while they tangentially drift due to the magnetic gradient (the ∇B drift). The combination of pitch angle scatter off the background ions and the ∇B drift gives rise to two narrow boundary layers in the trapped region. The first is at the trapped-passing boundary and enables the finite trapped response to be matched to the vanishing passing response of themore »« less

Similar Records