Now showing items 1-10 of 10

  • 3D PiC code investigations of Auroral Kilometric Radiation mechanisms 

    Gillespie, K. M.; McConville, S. L.; Speirs, D. C.; Ronald, K.; Phelps, A. D. R.; Bingham, R.; Cross, A. W.; Robertson, C. W.; Whyte, C. G.; He, W.; Vorgul, I.; Cairns, R. A.; Kellett, B. J. (IOP Publishing Ltd., 2014) - Conference item
    Efficient (similar to 1%) electron cyclotron radio emissions are known to originate in the X mode from regions of locally depleted plasma in the Earths polar magnetosphere. These emissions are commonly referred to as the ...
  • 3D pic simulations of collisionless shocks at lunar magnetic anomalies and their role in forming lunar swirls 

    Bamford, R. A.; Alves, E. P.; Cruz, F.; Kellett, B. J.; Fonsesca, R. A.; Silva, L. O.; Trines, R. M. G. M.; Halekas, J. S.; Kamer, G.; Harnett, E.; Cairns, Robert Alan; Bingham, R. (2016-10-18) - Journal article
    Investigation of the lunar crustal magnetic anomalies offers a comprehensive long-term data set of observations of small-scale magnetic fields and their interaction with the solar wind. In this paper a review of the ...
  • Backward wave cyclotron-maser emission in the auroral magnetosphere 

    Speirs, D. C.; Bingham, R.; Cairns, R. A.; Vorgul, I.; Kellett, B. J.; Phelps, A. D. R.; Ronald, K. (2014-10-07) - Journal article
    In this Letter, we present theory and particle-in-cell simulations describing cyclotron radio emission from Earth's auroral region and similar phenomena in other astrophysical environments. In particular, we find that the ...
  • Effect of collisions on amplification of laser beams by Brillouin scattering in plasmas 

    Humphrey, K. A.; Trines, R. M. G. M.; Fiuza, F.; Speirs, D. C.; Norreys, P.; Cairns, R. A.; Silva, L. O.; Bingham, R. (2013-10) - Journal article
    We report on particle in cell simulations of energy transfer between a laser pump beam and a counter-propagating seed beam using the Brillouin scattering process in uniform plasma including collisions. The results presented ...
  • Laminar shocks in high power laser plasma interactions 

    Cairns, R. A.; Bingham, R.; Norreys, P.; Trines, R. (2014-02) - Journal article
    We propose a theory to describe laminar ion sound structures in a collisionless plasma. Reflection of a small fraction of the upstream ions converts the well known ion acoustic soliton into a structure with a steep potential ...
  • Numerical simulation of unconstrained cyclotron resonant maser emission 

    Speirs, D. C.; Gillespie, K. M.; Ronald, K.; McConville, S. L.; Phelps, A. D. R.; Cross, A. W.; Bingham, R.; Kellett, B. J.; Cairns, R. A.; Vorgul, I. (IOP Publishing Ltd., 2014-05-07) - Conference item
    When a mainly rectilinear electron beam is subject to significant magnetic compression, conservation of magnetic moment results in the formation of a horseshoe shaped velocity distribution. It has been shown that such a ...
  • Progress towards numerical and experimental simulations of fusion relevant beam instabilities 

    King, M.; Bryson, R.; Ronald, K.; Cairns, R. A.; McConville, S. L.; Speirs, D. C.; Phelps, A. D. R.; Bingham, R.; Gillespie, K. M.; Cross, A. W.; Vorgul, I.; Trines, R. (IOP Publishing Ltd., 2014-05-07) - Conference item
    In certain plasmas, non-thermal electron distributions can produce instabilities. These instabilities may be useful or potentially disruptive. Therefore the study of these instabilities is of importance in a variety of ...
  • Scaled Experiment to Investigate Auroral Kilometric Radiation Mechanisms in the Presence of Background Electrons 

    McConville, S. L.; Ronald, K.; Speirs, D. C.; Gillespie, K. M.; Phelps, A. D. R.; Cross, A. W.; Bingham, R.; Robertson, C. W.; Whyte, C. G.; He, W.; King, M.; Bryson, R.; Vorgul, I.; Cairns, R. A.; Kellett, B. J. (IOP Publishing Ltd., 2014-05-07) - Conference item
    Auroral Kilometric Radiation (AKR) emissions occur at frequencies similar to 300kHz polarised in the X-mode with efficiencies similar to 1-2% [1,2] in the auroral density cavity in the polar regions of the Earth's ...
  • Solar coronal electron heating by short-wavelength dispersive shear Alfvén waves 

    Bingham, R.; Shukla, P. K.; Eliasson, B.; Cairns, A.; Cairns, R Alan (2015-09-15) - Journal article
    The electron heating of the solar coronal plasma has remained one of the most important problems in solar physics. An explanation of the electron heating rests on the identification of the energy source and appropriate ...
  • Weak collisionless shocks in laser-plasmas 

    Cairns, R. A.; Bingham, R.; Trines, R. G. M.; Norreys, P. (2015-04) - Journal article
    We obtain a theory describing laminar shock-like structures in a collisionless plasma and examine the parameter limits, in terms of the ion sound Mach number and the electron/ion temperature ratio, within which these ...