&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 10\<SUP\>-3\</SUP\>.
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 10\<SUP\>-5\</SUP\>.
Switches on all four options: MAXWELL,
PLANES, TUBE and
WIRES.
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 which is useful when
determining the range of electric fields for which transport
quantities are needed.
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 EX_n, EY_n, E_n, V_n and
PHI_n, all of which are of type
Matrix, and where "n" is
the wire number
Also, the Histograms from
the MAXWELL option are kept under the
names EX_ERROR, EY_ERROR, EZ_ERROR, DIV_E, DIV_B.
In case these global variables are already in use, then their
original contents will be lost after CHECK has executed.
You have to declare the Global variables before the loop if
- the instruction is placed in the body of a Do loop and
- these global variables are used in arithmetic, in a
condition of an If_line or in a condition of an
If_block.
Declaring is not required if the variables are only used outside
the loop, in procedure Calls, in Say statements or for
substitution in normal input statements.
[The output is not kept by default.]
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Formatted on 21/01/18 at 16:55.