TITLE

Simulated and experimental compression of a compact toroid

AUTHOR(S)
Johnson, J. N.; Hwang, D. Q.; Horton, R. D.; Evans, R. W.; Owen, J. M.
PUB. DATE
July 2009
SOURCE
Applied Physics Letters;7/6/2009, Vol. 95 Issue 1, p011501
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
We present simulation results and experimental data for the compression of a compact toroid by a conducting nozzle without a center electrode. In both simulation and experiment, the plasma flow is obstructed by even modest magnetic fields. A simple mechanism for this obstruction is suggested by our simulations. The configuration of the plasmoid’s magnetic field plays a significant role in its compression. We analyze two types of plasma configurations under compression and demonstrate that the results from the simulations match those from the experiments, and that the mechanism predicts the different behaviors observed in the two cases.
ACCESSION #
43158410

 

Related Articles

  • Stochastization of Magnetic Field Surfaces in Tokamaks by an Inner Coil. Chávez-Alarcón, Esteban; Herrera-Velázquez, J. Julio E.; Braun-Gitler, Eliezer // AIP Conference Proceedings;2006, Vol. 875 Issue 1, p347 

    A 3-D code has been developed in order to simulate the magnetic field lines in circular cross-section tokamaks. The toroidal magnetic field can be obtained from the individual fields of circular coils arranged around the torus, or alternatively, as a ripple-less field. The poloidal field is...

  • EL ITER PROGRESA.  // DYNA - Ingeniería e Industria;nov/dic2012, Vol. 87 Issue 6, p608 

    No abstract available.

  • Using numerical simulations to extract parameters of toroidal electron plasmas from experimental data. Ha, B. N.; Stoneking, M. R.; Marler, J. P. // Physics of Plasmas;Mar2009, Vol. 16 Issue 3, p032110 

    Measurements of the image charge induced on electrodes provide the primary means of diagnosing plasmas in the Lawrence Non-neutral Torus II (LNT II) [Phys. Rev. Lett. 100, 155001 (2008)]. Therefore, it is necessary to develop techniques that determine characteristics of the electron plasma from...

  • Spherical Magnetic Vortex in an External Potential Field: A Dissipative Contraction. Solov'ev, A. // Solar Physics;Sep2013, Vol. 286 Issue 2, p441 

    We consider the dissipative evolution of a spherical magnetic vortex with a force-free internal structure, located in a resistive medium and held in equilibrium by the potential external field. The magnetic field inside the sphere is force-free (the model of Chandrasekhar in Proc. Natl. Acad....

  • Instability of current sheets and formation of plasmoid chains. Loureiro, N. F.; Schekochihin, A. A.; Cowley, S. C. // Physics of Plasmas;Oct2007, Vol. 14 Issue 10, p100703 

    Current sheets formed in magnetic reconnection events are found to be unstable to high-wavenumber perturbations. The instability is very fast: its maximum growth rate scales as S1/4vA/LCS, where LCS is the length of the sheet, vA the Alfvén speed, and S the Lundquist number. As a result, a...

  • Fast response neutron emission monitor for fusion reactor using Stilbene Scintillator and Flash-ADC. Itoga, T.; Ishikawa, M.; Baba, M.; Okuji, T.; Oishi, T.; Nakhostin, M.; Nishitani, T. // Radiation Protection Dosimetry;Aug2007, Vol. 126 Issue 1-4, p380 

    The stilbene neutron detector which has been used for neutron emission profile monitoring in JT-60U has been improved, to respond to the requirement to observe the high-frequency phenomena in megahertz region such as toroidicity-induced Alfvén Eigen mode in burning plasma as well as the...

  • Spectral asymmetry due to magnetic coordinates. Jong-kyu Park; Boozer, Allen H.; Menard, Jonathan E. // Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p064501 

    The use of magnetic coordinates is ubiquitous in toroidal plasma physics but the distortion in Fourier spectra produced by these coordinates is not well known. A spatial symmetry of the field is not always represented by a symmetry in the Fourier spectrum when magnetic coordinates are used...

  • The Solar Dynamo and Its Phase Transitions during the Last Millennium. Duhau, S.; De Jager, C. // Solar Physics;Jul2008, Vol. 250 Issue 1, p1 

    We analyze the variation of the solar-dynamo magnetic-field components during the last millennium through a study of their proxy data. We introduce a phase diagram with as abscissa and ordinate the proxies of the values of the toroidal and poloidal magnetic field components. In this diagram the...

  • Tearing Modes in Tokamaks. White, R. B. // AIP Conference Proceedings;5/14/2008, Vol. 1013 Issue 1, p59 

    This lecture gives a basic introduction to magnetic £elds, magnetic surface destruction, toroidal equilibrium and tearing modes in a tokamak, including the linear and nonlinear development of these modes and their modi£cation by current drive and bootstrap current, and sawtooth...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics