Imaging of the magnetic field structure in megagauss plasmas by combining pulsed polarimetry with an optical Kerr effect shutter technique

Smith, R. J.
October 2010
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D530
Academic Journal
Pulsed polarimetry in combination with a high speed photographic technique based on the optical Kerr effect is described. The backscatter in a pulsed polarimeter is directed through a scattering cell and photographed using an ∼1 ps shutter, essentially freezing the intensity pattern. The image provides both the local electron density and magnetic field distributions along and transverse to the laser sightline. Submillimeter spatial resolution is possible for probing wavelengths in the visible due to the high densities and strong optical activity. Pulsed polarimetry is thereby extended to centimeter-sized plasmas with ne>1019-1020 cm-3 and B>20-100 T (MG) produced by multiterawatt, multimega-ampere electrical drivers, wire Z pinches, and liner imploded magnetized plasmas.


Related Articles

  • Ignition threshold for non-Maxwellian plasmas. Hay, Michael J.; Fisch, Nathaniel J. // Physics of Plasmas;215, Vol. 22 Issue 11, p1 

    An optically thin p-11B plasma loses more energy to bremsstrahlung than it gains from fusion reactions, unless the ion temperature can be elevated above the electron temperature. In thermal plasmas, the temperature differences required are possible in small Coulomb logarithm regimes,...

  • Three-dimensional particle simulation of heavy-ion fusion beams*. Friedman, Alex; Grote, David P.; Haber, Irving // Physics of Fluids B: Plasma Physics;Jul92, Vol. 4 Issue 7, p2203 

    The beams in a heavy-ion-beam-driven inertial fusion (HIF) accelerator are collisionless, nonneutral plasmas, confined by applied magnetic and electric fields. These space-chargedominated beams must be focused onto small (few mm) spots at the fusion target, and so preservation of a small...

  • Integrated simulations of implosion, electron transport, and heating for direct-drive fast-ignition targets. Solodov, A. A.; Anderson, K. S.; Betti, R.; Gotcheva, V.; Myatt, J.; Delettrez, J. A.; Skupsky, S.; Theobald, W.; Stoeckl, C. // Physics of Plasmas;May2009, Vol. 16 Issue 5, p056309 

    A thorough understanding of future integrated fast-ignition experiments combining compression and heating of high-density thermonuclear fuel requires hybrid (fluid+particle) simulations of the implosion and ignition process. Different spatial and temporal scales need to be resolved to model the...

  • Early Time Studies of Cylindrical Liner Implosions at 1 MA on COBRA. Atoyan, L.; Byvank, T.; Cahill, A. D.; Hoyt, C. L.; de Grouchy, P. W. L.; Potter, W. M.; Kusse, B. R.; Hammer, D. A. // AIP Conference Proceedings;2014, Vol. 1639 Issue 1, p67 

    Tests of the magnetized liner inertial fusion (MagLIF) concept will make use of the 27 MA Z machine at Sandia National Laboratories, Albuquerque, to implode a cylindrical metal liner to compress and heat preheated, magnetized plasma contained within it. While most pulsed power machines produce...

  • The ignition design space of magnetized target fusion. Lindemuth, Irvin R. // Physics of Plasmas;Dec2015, Vol. 22 Issue 12, p1 

    The simple magnetized target implosion model of Lindemuth and Kirkpatrick [Nucl. Fusion 23, 263 (1983)] has been extended to survey the potential parameter space in which three types of magnetized targets--cylindrical with axial magnetic field, cylindrical with azimuthal magnetic field, and...

  • Mechanism for magnetic field generation and growth in Rayleigh-Taylor unstable inertial confinement fusion plasmas. Srinivasan, Bhuvana; Tang, Xian-Zhu // Physics of Plasmas;Aug2012, Vol. 19 Issue 8, p082703 

    Rayleigh-Taylor instabilities (RTI) in inertial confinement fusion (ICF) implosions are expected to generate magnetic fields at the gas-ice interface and at the ice-ablator interface. The focus here is on the gas-ice interface where the temperature gradient is the largest. A Hall-MHD model is...

  • Quadrature polarimetry for plasma Faraday rotation measurement. Howard, John // Review of Scientific Instruments;Jan1995, Vol. 66 Issue 1, p383 

    Describes a quadrature polarimeter for measuring plasma magnetic field an electron densities. Polarization ellipse tilt angle encoded as a relative phase shift between orthogonally polarized beams; Recovery of the phase using standard quadrature interferometric methods.

  • Modelling Thomson scattering for systems with non-equilibrium electron distributions. Chapman, D. A.; Vorberger, J.; Wünsch, K.; Gericke, D. O. // EPJ Web of Conferences;2013, Issue 59, p1 

    We investigate the effect of non-equilibrium electron distributions in the analysis of Thomson scattering for a range of conditions of interest to inertial confinement fusion experiments. Firstly, a generalised one-component model based on quantum statistical theory is given in the random phase...

  • Radiative properties and line trapping effects in post-explosion inertial fusion plasmas. MacFarlane, J. J.; Wang, P. // Physics of Fluids B: Plasma Physics;Dec91, Vol. 3 Issue 12, p3494 

    Radiative transfer will play a major role in energy transport within post-explosion inertial confinement fusion (ICF) plasmas. The physical processes affecting radiative energy transport in such moderate-density plasmas are qualitatively different from those of many higher-opacity laboratory...


Read the Article


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

Try another library?
Sign out of this library

Other Topics