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To third order, fringing fields for multipoles are effective only for
their quadrupole- or hexapole-component.
This fringing field is defined by the command:
3 F(RINGING) F(IELD) <table#> ;
[example: F F 2 ;]
[F F 1 ;]
The fringing-field integrals are taken from GIOSFF.DAT, if this mode
is active; the coefficients are taken from GICOFF.DAT otherwise.
Note that
- z is the coordinate along the optic axis and that
- G0 is the aperture radius of the multipole.
- Note also that all integrals must be taken from za outside
to zb inside the main-field regions.
KPII
1999-10-20