SIMION 8.0 Issues/Bugs/Enhancements

Issue I482 [81,enhancement,poisson,partiallyresolved]
  Refine extended to solve the Poisson Equation

  SIMION's electric field solver (Refine function) has recently been
  extended to support solving the Poisson Equation. As before, the
  Refine function can calculate potentials inside a volume defined by
  electrodes, but the new Poisson solving capability allows it to also
  handle the case when a known, arbitrary distribution of space-charge
  density also fills that volume (such as due to high current charged
  particle beams or charged insulators)

  The Poisson solver has already been implemented in the 2D case (the
  3D case will follow soon).  However, it will not be formally
  included in SIMION until version 8.1, as Poisson solving will be one
  of the major new capabilities in that version.  Still, 8.0 users may
  previewed it via the "early access mode" (Issue I421).  In SIMION
  8.0, click the "Check for Updates" button and download version
  8.0.5-TEST5 or above of simion.exe as well as the new Poisson
  examples (simion81-poisson-*.zip).

  For full details, see the README.html, poisson.html and example
  files in the Poisson examples.  See also SIMION Info:Poisson
  Equation ( http://www.simion.com/info/Poisson_Equation ).

  Implemented in 8.0.5-TEST5 (early access mode).
  Poisson examples updated in 8.0.4-TEST13.
  Formally scheduled for 8.1.

  Update: 2008-04-14: Fixed a fairly critical error in piclib library
    in the Poisson examples.
    The following should be added to the top of segment.other_actions
    (just after the "if PIC_enable == 0 then return end"):
    "if ion_time_of_flight <= ion_time_of_birth then return end".