Particle-in-cell with Monte Carlo collision modeling of the electron and negative hydrogen ion transport across a localized transverse magnetic field

Kolev, St.; Hagelaar, G. J. M.; Boeuf, J. P.
April 2009
Physics of Plasmas;Apr2009, Vol. 16 Issue 4, p042318
Academic Journal
The control of the electron temperature and charged particle transport in negative hydrogen ion sources has a crucial role for the performance of the system. It is usually achieved by the use of a magnetic filter—localized transverse magnetic field, which reduces the electron temperature and enhances the negative ion yield. There are several works in literature on modeling of the magnetic filter effects based on fluid and kinetic modeling, which, however, suggest rather different mechanisms responsible for the electron cooling and particle transport through the filter. Here a kinetic modeling of the problem based on the particle-in-cell with Monte Carlo collisions method is presented. The charged particle transport across a magnetic filter is studied in hydrogen plasmas with and without including volume production of negative ions, in a one-dimensional Cartesian geometry. The simulation shows a classical (collisional) electron diffusion across the magnetic filter with reduction in the electron temperature but no selective effect in electron energy is observed (Coulomb collisions are not considered). When a bias voltage is applied, the plasma is split into an upstream electropositive and a downstream electronegative regions. Different configurations with respect to bias voltage and magnetic field strength are examined and discussed. Although the bias voltage allows negative ion extraction, the results show that volume production of negative ions in the downstream region is not really enhanced by the magnetic filter.


Related Articles

  • Two-dimensional, three-velocity particle-in-cell with Monte Carlo collisions simulations of LANSCE’s H- source. Chacon-Golcher, Edwin; Bowers, Kevin J. // Review of Scientific Instruments;Mar2006, Vol. 77 Issue 3, p03A526 

    A two-dimensional, three-velocity particle-in-cell with Monte Carlo collisions (MCC) gun code is under development at LANSCE to study surface conversion H- ion source physics from a first-principles approach. The code is electromagnetostatic and is based on a sine transform/tridiagonal matrix...

  • Modeling of Neutrals and H- Transport in a Large Negative Ion Source. Kameyama, N.; Matsushita, D.; Koga, S.; Terasaki, R.; Hatayama, A. // AIP Conference Proceedings;9/26/2011, Vol. 1390 Issue 1, p39 

    A systematic study of the extraction probability of surface-produced H- ions from the ion source has been done with H- and neutral Monte-Carlo transport modeling. Without the effects of the flow velocity of background H+ ions and neutrals, the extraction probability (E.P.) depends strongly on...

  • Physics of Event Generators. Werner, K. // AIP Conference Proceedings;2002, Vol. 631 Issue 1, p397 

    An event generator for nuclear collisions is a microscopic model, obtained from extrapolating elementary interactions as electron-positron annihilation, deep inelastic scattering, and proton-proton interactions towards proton-nucleus and nucleus-nucleus scattering, by using Monte Carlo...

  • Simple generalized oscillator strength density model applied to the simulation of keV electron-energy-loss distributions. Liljequist, D. // Journal of Applied Physics;2/1/1985, Vol. 57 Issue 3, p657 

    Presents a study which performed Monte Carlo calculations of kiloelectronvolt electron-energy-loss distributions using a method of the generalized oscillator strength density to simulate inelastic collisions. Information on the model; Extension of the model; Simulation procedure for inelastic...

  • Low-energy electron collisions with sulfur hexafluoride, SF6. Winstead, C.; McKoy, V. // Journal of Chemical Physics;9/22/2004, Vol. 121 Issue 12, p5828 

    We report calculated cross sections for elastic and electronically inelastic collisions of low-energy electrons with sulfur hexafluoride, SF6. Elastic cross sections are computed within the fixed-nuclei approximation, with polarization effects incorporated. Inelastic cross sections for nine...

  • Pseudo-3D PIC modeling of drift-induced spatial inhomogeneities in planar magnetron plasmas. Revel, A.; Minea, T.; Tsikata, S. // Physics of Plasmas;2016, Vol. 23 Issue 10, p100701-1 

    A pseudo-3D modeling approach, based on a particle-in-cell (PIC)-Monte Carlo collisions algorithm, has been developed for the study of large- and short-scale organization of the plasma in a planar magnetron. This extension of conventional PIC modeling permits the observation of spontaneous...

  • A hybrid model for simulation of secondary electron emission in plasma immersion ion implantation under different pulse rise time. Safa, N. Navab; Ghomi, H. // Physics of Plasmas;2015, Vol. 22 Issue 2, p1 

    A hybrid fluid Particle in Cell-Monte Carlo Collision (PiC-MCC) model is presented to study the effect of secondary electron emission on the plasma immersion ion implantation process under different pulse rise time. The model describes the temporal evolution of various parameters of plasma such...

  • Monte Carlo calculations of energy deposition distributions of electrons below 20 keV in protein. Tan, Zhenyu; Liu, Wei // Radiation & Environmental Biophysics;May2014, Vol. 53 Issue 2, p427 

    The distributions of energy depositions of electrons in semi-infinite bulk protein and the radial dose distributions of point-isotropic mono-energetic electron sources [i.e., the so-called dose point kernel (DPK)] in protein have been systematically calculated in the energy range below 20 keV,...

  • ESTIMATE OF RADIATION DAMAGE TO LOW-LEVEL ELECTRONICS OF THE RF SYSTEM IN THE LHC CAVITIES ARISING FROM BEAM GAS COLLISIONS. Butterworth, A.; Ferrari, A.; Tsoulou, E.; Vlachoudis, V.; Wijnands, T. // Radiation Protection Dosimetry;2005, Vol. 116 Issue 1-4, p521 

    Monte Carlo simulations have been performed to estimate the radiation damage induced by high-energy hadrons in the digital electronics of the RF low-level systems in the LHC cavities. High-energy hadrons are generated when the proton beams interact with the residual gas. The contributions from...


Read the Article


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

Try another library?
Sign out of this library

Other Topics