Measurements of the Canonical Helicity of a Gyrating Kink

doi:10.1103/PhysRevLett.121.035001

Title: Measurements of the Canonical Helicity of a Gyrating Kink

Full Record
Other Related Research

Abstract

Conversions between magnetic and kinetic energy occur over a range of plasma scales in astrophysical and solar dynamos and reconnection in the solar corona and the laboratory. Canonical flux tubes reconcile all plasma regimes with concepts of twists, writhes, and linkages. We present measurements of canonical flux tubes, their helicity, and their helicity transport in a gyrating plasma kink. The helicity gauge is removed with general techniques valid even if only a limited section of the plasma is measured. Temporal asymmetries in the helicities confirm irreducible 3D fields in the kink.

Authors:

von der Linden, Jens ^[1]; Sears, Jason ^[1]; Intrator, Thomas ^[2]; You, Setthivoine ^[3]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Univ. of Tokyo (Japan). Graduate School of Frontier Sciences

Publication Date:: 2018-07-18

Research Org.:: Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24); National Aeronautic and Space Administration (NASA); National Science Foundation (NSF)

OSTI Identifier:: 1460609

Alternate Identifier(s):: OSTI ID: 1465280

Report Number(s):: LLNL-JRNL-747364
Journal ID: ISSN 0031-9007; 932189; TRN: US1902462

Grant/Contract Number:: AC52-07NA27344; SC0010340; NNHIOA044I-Basic

Resource Type:: Published Article

Journal Name:: Physical Review Letters

Additional Journal Information:: Journal Volume: 121; Journal Issue: 3; Journal ID: ISSN 0031-9007

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; dynamo theory; magnetic field generation & plasma dynamo; magnetic reconnection

Citation Formats


                    von der Linden, Jens, Sears, Jason, Intrator, Thomas, and You, Setthivoine. Measurements of the Canonical Helicity of a Gyrating Kink.  United States: N. p., 2018. 
        Web.  doi:10.1103/PhysRevLett.121.035001.

Copy to clipboard


                    von der Linden, Jens, Sears, Jason, Intrator, Thomas, & You, Setthivoine. Measurements of the Canonical Helicity of a Gyrating Kink.  United States.  doi:10.1103/PhysRevLett.121.035001.

Copy to clipboard


                    von der Linden, Jens, Sears, Jason, Intrator, Thomas, and You, Setthivoine. Wed .  
        "Measurements of the Canonical Helicity of a Gyrating Kink".  United States.  doi:10.1103/PhysRevLett.121.035001.

Copy to clipboard


                    
@article{osti_1460609,

  title        = {Measurements of the Canonical Helicity of a Gyrating Kink},

  author       = {von der Linden, Jens and Sears, Jason and Intrator, Thomas and You, Setthivoine},

  abstractNote = {Conversions between magnetic and kinetic energy occur over a range of plasma scales in astrophysical and solar dynamos and reconnection in the solar corona and the laboratory. Canonical flux tubes reconcile all plasma regimes with concepts of twists, writhes, and linkages. We present measurements of canonical flux tubes, their helicity, and their helicity transport in a gyrating plasma kink. The helicity gauge is removed with general techniques valid even if only a limited section of the plasma is measured. Temporal asymmetries in the helicities confirm irreducible 3D fields in the kink.},

  doi          = {10.1103/PhysRevLett.121.035001},

  journal      = {Physical Review Letters},

  number       = 3,

  volume       = 121,

  place        = {United States},

  year         = {2018},

  month        = {7}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Publisher's Version of Record
DOI: 10.1103/PhysRevLett.121.035001

Other availability

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Measurements of the Canonical Helicity of a Gyrating Kink

Journal Article von der Linden, Jens ; Sears, Jason ; Intrator, Thomas ; ... - Physical Review Letters

Conversions between magnetic and kinetic energy occur over a range of plasma scales in astrophysical and solar dynamos and reconnection in the solar corona and the laboratory. Canonical flux tubes reconcile all plasma regimes with concepts of twists, writhes, and linkages. We present measurements of canonical flux tubes, their helicity, and their helicity transport in a gyrating plasma kink. The helicity gauge is removed with general techniques valid even if only a limited section of the plasma is measured. Temporal asymmetries in the helicities confirm irreducible 3D fields in the kink.
DOI: 10.1103/PhysRevLett.121.035001

Full Text Available
The topology of canonical flux tubes in flared jet geometry

Journal Article Lavine, Eric Sander ; You, Setthivoine - The Astrophysical Journal (Online)

Magnetized plasma jets are generally modeled as magnetic flux tubes filled with flowing plasma governed by magnetohydrodynamics (MHD). We outline here a more fundamental approach based on flux tubes of canonical vorticity, where canonical vorticity is defined as the circulation of the species’ canonical momentum. This approach extends the concept of magnetic flux tube evolution to include the effects of finite particle momentum and enables visualization of the topology of plasma jets in regimes beyond MHD. A flared, current-carrying magnetic flux tube in an ion-electron plasma with finite ion momentum is thus equivalent to either a pair of electron andmore »« less
DOI: 10.3847/1538-4357/835/1/89

Full Text Available
Helicity transformation under the collision and merging of two magnetic flux ropes

Journal Article DeHaas, Timothy ; Gekelman, Walter - Physics of Plasmas

Magnetic helicity has become a useful tool in the analysis of astrophysical plasmas. Its conservation in the magnetohydrodynamic limit (and other fluid approaches) constrains the global behavior of large plasma structures. One such astrophysical structure is a magnetic flux rope: a tube-like, current-carrying plasma embedded in an external magnetic field. Bundles of these ropes are commonly observed in the near-earth environment and solar atmosphere. In this well-diagnosed experiment (three-dimensional measurements of n _e, T _e, V _p, B, J, E, and u _flow), two magnetic flux ropes are generated in the Large Plasma Device at UCLA. These ropes are drivenmore »« less
Cited by 2
DOI: 10.1063/1.4991413

Full Text Available
THE TOPOLOGY OF CANONICAL FLUX TUBES IN FLARED JET GEOMETRY

Journal Article Lavine, Eric Sander ; You, Setthivoine, E-mail: Slavine2@uw.edu, E-mail: syou@aa.washington.edu - Astrophysical Journal

Magnetized plasma jets are generally modeled as magnetic flux tubes filled with flowing plasma governed by magnetohydrodynamics (MHD). We outline here a more fundamental approach based on flux tubes of canonical vorticity, where canonical vorticity is defined as the circulation of the species’ canonical momentum. This approach extends the concept of magnetic flux tube evolution to include the effects of finite particle momentum and enables visualization of the topology of plasma jets in regimes beyond MHD. A flared, current-carrying magnetic flux tube in an ion-electron plasma with finite ion momentum is thus equivalent to either a pair of electron andmore »« less
DOI: 10.3847/1538-4357/835/1/89
NUMERICAL SIMULATIONS OF HELICITY CONDENSATION IN THE SOLAR CORONA

Journal Article Zhao, L. ; Zurbuchen, T. H. ; DeVore, C. R. ; ... - Astrophysical Journal

The helicity condensation model has been proposed by Antiochos to explain the observed smoothness of coronal loops and the observed buildup of magnetic shear at filament channels. The basic hypothesis of the model is that magnetic reconnection in the corona causes the magnetic stress injected by photospheric motions to collect only at those special locations where prominences are observed to form. In this work we present the first detailed quantitative MHD simulations of the reconnection evolution proposed by the helicity condensation model. We use the well-known ansatz of modeling the closed corona as an initially uniform field between two horizontalmore »« less
DOI: 10.1088/0004-637X/805/1/61

Similar Records