Effects of external axial magnetic field on fast electron propagation

Yang, X. H.; Borghesi, M.; Qiao, B.; Geissler, M.; Robinson, A. P. L.
September 2011
Physics of Plasmas;Sep2011, Vol. 18 Issue 9, p093102
Academic Journal
A scheme employing an external axial magnetic field is proposed to diagnose the intrinsic divergence of laser-generated fast electron beams, and this is studied numerically with hybrid simulations. The maximum beam radius of fast electrons increases with the initial divergence and decreases with the amplitude of the axial magnetic field. It is indicated that the intrinsic divergence of fast electrons can be inferred from measurements of the beam radius at different depth under the axial field. The proposed scheme here may be useful for future fast ignition experiments and in other applications of laser-generated fast electron beams.


Related Articles

  • A high-energy-density, high-Mach number single jet experiment. Hansen, J. F.; Dittrich, T. R.; Elliott, J. B.; Glendinning, S. G.; Cotrell, D. L. // Physics of Plasmas;Aug2011, Vol. 18 Issue 8, p082702 

    A high-energy-density, x-ray-driven, high-Mach number (M ≥ 17) single jet experiment shows constant propagation speeds of the jet and its bowshock into the late time regime. The jet assumes a characteristic mushroom shape with a stalk and a head. The width of the head and the bowshock also...

  • A Paul trap configuration to simulate intense non-neutral beam propagation over large distances through a periodic focusing quadrupole magnetic field. Davidson, Ronald C.; Qin, Hong; Shvets, Gennady // Physics of Plasmas;Mar2000, Vol. 7 Issue 3 

    This paper considers an intense non-neutral charged particle beam propagating in the z-direction through a periodic focusing quadrupole magnetic field with transverse focusing force, -κ[sub q](s)[xe[sub x]-ye[sub y]], on the beam particles. Here, s=β[sub b]ct is the axial coordinate,...

  • Numerical simulation of thin-shell direct drive DHe3-filled capsules fielded at OMEGA. Miles, A. R.; Chung, H.-K.; Heeter, R.; Hsing, W.; Koch, J. A.; Park, H.-S.; Robey, H. F.; Scott, H. A.; Tommasini, R.; Frenje, J.; Li, C. K.; Petrasso, R.; Glebov, V.; Lee, R. W. // Physics of Plasmas;Jul2012, Vol. 19 Issue 7, p072702 

    Thin-shell deuterium-helium-3 (DHe3) filled glass capsules on the Omega laser provide a fast-implosion experimental platform for developing separate time-resolved measurements of ion, electron, and radiation temperatures in nonequilibrium plasmas. Dynamically significant non-local thermodynamic...

  • Net current generation and beam transport efficiency of grad-B-drift transported relativistic electron beams. Rose, D. V.; Welch, D. R.; Ottinger, P. F.; Schumer, J. W. // Physics of Plasmas;Nov2001, Vol. 8 Issue 11, p4972 

    Numerical simulations of grad-B drifting, high-current, relativistic electron beams are presented. The simulations use a hybrid fluid/particle-in-cell code to study the net-current and conductivity evolution for 200 to 900 kA, 1.3 MeV annular electron beams in a background gas of nitrogen (N[sub...

  • First measurements of laser-accelerated proton induced luminescence. Floquet, V.; Ceccotti, T.; Dobosz Dufrénoy, S.; Bonnaud, G.; Gremillet, L.; Monot, P.; Martin, Ph. // Physics of Plasmas;Sep2012, Vol. 19 Issue 9, p094501 

    We present our first results about laser-accelerated proton induced luminescence in solids. In the first part, we describe the optimization of the proton source as a function of the target thickness as well as the laser pulse duration and energy. Due to the ultra high contrast ratio of our laser...

  • Generation and optimization of electron currents along the walls of a conical target for fast ignition. Micheau, S.; Debayle, A.; d'Humières, E.; Honrubia, J. J.; Qiao, B.; Zepf, M.; Borghesi, M.; Geissler, M. // Physics of Plasmas;Dec2010, Vol. 17 Issue 12, p122703 

    The interaction of an ultraintense laser pulse with a conical target is studied by means of numerical particle-in-cell simulations in the context of fast ignition. The divergence of the fast electron beam generated at the tip of the cone has been shown to be a crucial parameter for the efficient...

  • One-dimensional particle simulation of the filamentation instability: Electrostatic field driven by the magnetic pressure gradient force. Dieckmann, M. E.; Kourakis, I.; Borghesi, M.; Rowlands, G. // Physics of Plasmas;Jul2009, Vol. 16 Issue 7, p074502 

    Two counterpropagating cool and equally dense electron beams are modeled with particle-in-cell simulations. The electron beam filamentation instability is examined in one spatial dimension, which is an approximation for a quasiplanar filament boundary. It is confirmed that the force on the...

  • Fully and Partly Divergence and Rotation Free Interpolation of Magnetic Fields. de Haan, Victor-Otto // Journal of Electromagnetic Analysis & Applications;Jul2013, Vol. 5 Issue 7, p281 

    A new interpolation method for rotation and divergence free fields is presented. It is based on a suitable choice of a tricubic interpolation scheme and reaches an accuracy of third order in grid size (Δx). With the interpolation method it is possible to increase the accuracy with a factor...

  • Numerical experiments on plasmoids entering a transverse magnetic field. Gunell, H.; Walker, J. J.; Koepke, M. E.; Hurtig, T.; Brenning, N.; Nilsson, H. // Physics of Plasmas;Nov2009, Vol. 16 Issue 11, p112901 

    Plasma from the Earth’s magnetosheath has previously been observed inside the magnetosphere. Inhomogeneities in the magnetosheath plasma, here called plasmoids, can impact the magnetopause and doing so set up a polarizing field that allows it to penetrate the magnetopause and enter the...


Read the Article


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

Try another library?
Sign out of this library

Other Topics