Maintaining the closed magnetic-field-line topology of a field-reversed configuration (FRC) with the addition of static transverse magnetic fields

doi:https://doi.org/10.2172/750253

Title: Maintaining the closed magnetic-field-line topology of a field-reversed configuration (FRC) with the addition of static transverse magnetic fields

Full Record
Other Related Research

Abstract

The effects on magnetic-field-line structure of adding various static transverse magnetic fields to a Solovev-equilibrium field-reversed configuration is examined. It is shown that adding fields that are anti-symmetric about the axial mid-plane maintains the closed field-line structure, while adding fields with planar or helical symmetry opens the field structure. Anti-symmetric modes also introduce pronounced shear.

Authors:: Cohen, S A; Milroy, R D

Publication Date:: Thu Jan 13 00:00:00 EST 2000

Research Org.:: Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

Sponsoring Org.:: USDOE Office of Energy Research (ER) (US)

OSTI Identifier:: 750253

Report Number(s):: PPPL-3418
TRN: US0000740

DOE Contract Number:: AC02-76CH03073

Resource Type:: Technical Report

Resource Relation:: Other Information: PBD: 13 Jan 2000

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION; MAGNETIC FIELD REVERSAL; MAGNETIC FIELDS; SHEAR; THERMONUCLEAR DEVICES

Citation Formats


                    Cohen, S A, and Milroy, R D. Maintaining the closed magnetic-field-line topology of a field-reversed configuration (FRC) with the addition of static transverse magnetic fields.  United States: N. p., 2000. 
        Web.  doi:10.2172/750253.

Copy to clipboard


                    Cohen, S A, & Milroy, R D. Maintaining the closed magnetic-field-line topology of a field-reversed configuration (FRC) with the addition of static transverse magnetic fields.  United States.  https://doi.org/10.2172/750253

Copy to clipboard


                    Cohen, S A, and Milroy, R D. Thu .  
        "Maintaining the closed magnetic-field-line topology of a field-reversed configuration (FRC) with the addition of static transverse magnetic fields".  United States.  https://doi.org/10.2172/750253.  https://www.osti.gov/servlets/purl/750253.

Copy to clipboard


                    
@article{osti_750253,

  title        = {Maintaining the closed magnetic-field-line topology of a field-reversed configuration (FRC) with the addition of static transverse magnetic fields},

  author       = {Cohen, S A and Milroy, R D},

  abstractNote = {The effects on magnetic-field-line structure of adding various static transverse magnetic fields to a Solovev-equilibrium field-reversed configuration is examined. It is shown that adding fields that are anti-symmetric about the axial mid-plane maintains the closed field-line structure, while adding fields with planar or helical symmetry opens the field structure. Anti-symmetric modes also introduce pronounced shear.},

  doi          = {10.2172/750253},

  url          = {https://www.osti.gov/biblio/750253},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Thu Jan 13 00:00:00 EST 2000},

  month        = {Thu Jan 13 00:00:00 EST 2000}

}

Copy to clipboard

Technical Report:

View Technical Report (0.28 MB)

https://doi.org/10.2172/750253

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Maintaining the closed magnetic-field-line topology of a field-reversed configuration with the addition of static transverse magnetic fields

Journal Article Cohen, S A ; Milroy, R D - Physics of Plasmas

The effects on magnetic-field-line structure of adding various static transverse magnetic fields to a Solov'ev-equilibrium field-reversed configuration are examined. It is shown that adding fields that are antisymmetric about the axial midplane maintains the closed field-line structure, while adding fields with planar or helical symmetry opens the field structure. Antisymmetric modes also introduce pronounced shear. (c) 2000 American Institute of Physics.
https://doi.org/10.1063/1.874094
Ion heating in the field-reversed configuration (FRC) by rotating magnetic fields (RMF) near cyclotron resonance

Technical Report Cohen, Samuel A ; Glasser, Alan H

The trajectories of ions confined in a Solovev FRC equilibrium magnetic geometry and heated with a small-amplitude, odd-parity rotating magnetic field, have been studied with a Hamiltonian computer code. When the RMF frequency is in the ion-cyclotron range, explosive heating occurs. Higher-energy ions are found to have betatron-type orbits, preferentially localized near the FRC midplane. These results are relevant to a compact magnetic-fusion-reactor design.
https://doi.org/10.2172/758642

Full Text Available
Electron Acceleration in the Field-reversed Configuration (FRC) by Slowly Rotating Odd-parity Magnetic Fields

Technical Report Glasser, Alan H ; Cohen, Samuel A

The trajectories of individual electrons are studied numerically in a 3D, prolate, FRC [field-reversed configuration] equilibrium magnetic geometry with added small-aplitude, slowly rotating, odd-parity magnetic fields (RFos). RMFos cause electron heating by toroidal acceleration near the 0-point line and by field-parallel acceleration away from it, both followed by scattering from magnetic-field inhomogeneities. Electrons accelerated along the 0-point line move antiparallel to the FRC's current and attain average toroidal angular speeds near that of the RMFo, independent of the sense of RMFo rotation. A conserved transformed Hamiltonian, dependent on electron energy and RMFo sense, controls electron flux-surface coordinate.
https://doi.org/10.2172/786570

Full Text Available
Electron Acceleration in the Field-reversed Configuration (FRC) by Slowly Rotation Odd-parity Magnetic Fields (RMF[subscript o])

Technical Report Glasser, A H ; Cohen, S A

The trajectories of individual electrons are studied numerically in a 3D, prolate, FRC [field-reversed configuration] equilibrium magnetic geometry with added small-amplitude, slowly rotating, odd-parity magnetic fields (RMFos). RMFos cause electron heating by toroidal acceleration near the O-point line and by field-parallel acceleration away from it, both followed by scattering from magnetic-field inhomogeneities. Electrons accelerated along the O-point line move antiparallel to the FRC's current and attain average toroidal angular speeds near that of the RMFo, independent of the sense of RMFo rotation. A conserved transformed Hamiltonian, dependent on electron energy and RMFo sense, controls electron flux-surface coordinate.
https://doi.org/10.2172/781483

Full Text Available
ON POLAR MAGNETIC FIELD REVERSAL AND SURFACE FLUX TRANSPORT DURING SOLAR CYCLE 24

Journal Article Sun, Xudong ; Todd Hoeksema, J. ; Liu, Yang ; ... - Astrophysical Journal

As each solar cycle progresses, remnant magnetic flux from active regions (ARs) migrates poleward to cancel the old-cycle polar field. We describe this polarity reversal process during Cycle 24 using four years (2010.33-2014.33) of line-of-sight magnetic field measurements from the Helioseismic and Magnetic Imager. The total flux associated with ARs reached maximum in the north in 2011, more than two years earlier than the south; the maximum is significantly weaker than Cycle 23. The process of polar field reversal is relatively slow, north-south asymmetric, and episodic. We estimate that the global axial dipole changed sign in 2013 October; the northernmore »« less
https://doi.org/10.1088/0004-637X/798/2/114

Similar Records