&DRIFT: SINGLE


functions

  The functions may use the following variables:

  ------------------------------------------------------------------------
  Symbol          Meaning                       Note
  ------------------------------------------------------------------------
  X, Y, Z           Position                    R, PHI for polar cells
  EX, EY, EZ, E     E-field at (x,y,z)          ER, EPHI for polar cells
  BX, BY, BZ, B     B-field at (x,y,z)          only if there is a B-field
  VDX, VDY, VDZ, VD Local drift velocity        VDR, VDPHI for polar cells
  TIME              Cumulative drift time
  PATH              Cumulative path length
  DIFFUSION         Local long. diffusion       only if data is available
  TOWNSEND          Local Townsend coeff.       only if data is available
  ATTACHMENT        Local attachment coeff.     only if data is available
  STATUS            Drift line status code      numeric status code
  ------------------------------------------------------------------------

  No meaningful default functions are provided.

  See "CALL -> DRIFT_INFORMATION -> istat" for an explanation of the
  numeric status code.

PRINT

  Requests a printed table of the coordinate and integrated drift time
  at each step and of the function f3.

  The table is by default not produced.

PLOT

  Requests a graph of function f1, plotted along the y-axxis,
  vs function f2, plotted along the x-axis.
  By default, a graph is not made.

ELECTRON

  The drift line will be calculated for an electron.

ION

  The drift line will be calculated for an ion.

POSITIVE

  The particle which is drifted has a positive charge.

NEGATIVE

  The particle which is drifted has a negative charge.

Keyword index. Formatted on 10/11/98.