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An electrostatic sector field is defined by the command:
7 E(LECTROSTATIC) S(ECTOR-FIELD)
<radius of deflection
in meter>
<angle of deflection
in degrees>
<half electrode gap G0 in meter>
<nE1> <nE2> <nE3> ;
[example: E S 1.0 90 0.03 1 ;]
[E S 1.0 90 0.01 0 0 0 ;]
where the toroidicity of the mid-equipotential surface of the sector field
is determined by RE (see Fig. 4.17 in Ref. 7) with
For first- and second-order
calculations nE1 is defined for -2<nE1<2.
For third-order calculations nE1 is defined only for 0<nE1<2.
Special cases are:
- cylindrical electrodes:
nE1=nE2=nE3=0
- spherical concentric electrodes:
nE1=-nE2=nE3=1
- toroidal electrodes, i.e. electrodes which intersect the xz- as
well as the yz-planes in circles:
KPII
1999-10-20