&FIELD: CHECK
The number of bins in the histograms produced by the MAXWELL
option.
By default: 100 bins.
The epsilon used to compute differentials when comparing
dV/dx and -Ex.
This parameter is by default set to 1.0E-3.
The spacing parameter for the Neville extrapolation of the
points used to get an estimate of the potentials and the
field at the wire surface.
This parameter is by default set to 1.0E-5.
Switches on all four options: MAXWELL, PLANE, TUBE and WIRE.
When this option is selected, tables showing the divergence of the
electric field, the difference between dV/dx and Ex, between dV/dy
and Ey and the divergence of the magnetic field are printed. In
addition, a set of histograms containing related data is plotted.
The options PRINT and PLOT can be used to reduce the volume of
output. The histograms produced via this option can be saved with
the KEEP-RESULTS option.
Compares the potential given to the planes with the potential
calculated near the field.
Computes the potential and the field near the surface of the tube
and also prints a check-sum of the charges and the field integral
around the tube.
Compares the potential given to the wires with the potential
extrapolated to the wire surface. In addition, the electric field
on the wire surface is printed - a quantity sometimes used to
estimate the amplification of the wire.
If you wish to store these results in global variables, then use
the KEEP-RESULTS option.
Verifies that the net flux of the electric field around the
3-dimensional charges matches the charge of these objects.
When this option is selected, the surface field and potential
on the selected wires are stored as matrices called EX_n, EY_n,
E_n, V_n and PHI_n. Also, the histograms from the MAXWELL
option are kept.
In case these global variables are already in use, then their
contents will be lost.
If (1) the instruction is placed in the body of a DO loop and
(2) these global variables are used in arithmetic or in IF
conditions, then you have to declare the global variables before
the DO loop by assigning them an (arbitrary value). Declaring is
not required if the variables are only used outside a DO loop,
e.g. in SAY statements or in procedure calls.
[The output is not kept by default.]
Keyword index.
Formatted on 10/11/98.