&SIGNAL: SIGNAL-PARAMETERS
Switching on this option makes that the total induced charge
corresponds closely to the integral of the signal that is
output by the program. This is less trivial than it may sound
since signals can contain structure on a much smaller time
scale than the binning of the signal.
The averaging is done with an 2*n_average+1 point Newton-Raphson
integration over a time bin centred at the point in time indicated
in the output, interpolating the signal vector with a polynomial
order set with INTERPOLATION-ORDER.
[By default, 5 points are used, i.e. n_average is set to 2.]
In order to average the signal over a time bin, the
signal is interpolated with polynomials of order n_order,
and then integrated using the Newton-Raphson technique
over 2*n_average+1 points. The n_average parameter is set
with the AVERAGE-SIGNAL option.
The parameter n_order should not be chosen large since
especially electron pulses rise very fast. This can easily
give rise to interpolated values of the wrong sign.
[A value of 1 is therefore recommended, and is also default.]
If this option is switched on, then the signal that the program
returns corresponds to the current at the point in time
indicated in the output. Any fine structure smaller than the
binning is lost, which may lead to incorrect integrated currents.
Also, the signal when summed will not be normalised.
[By default, AVERAGE-SIGNAL is used with 5-point integration.]
If this option is switched on, then the signal between integration
steps is assumed to be constant. The signals will be correctly
normalised to the extent that this assumption holds. This is the
appropriate setting for Monte_Carlo and
and microscopic drift-line integration,
but not for Runge_Kutta_Fehlberg
integration.
[By default, AVERAGE-SIGNAL is used with 5-point integration.]
Only used with microscopic drift-line
integration.
Requests 6-point Gaussian integration of the weighting field over
a drift-path segment when computing the induced current. This is
considerably more precise in case long steps are taken because of
sparse drift-line sampling as set with the
step_size option of
the INTEGRATION-PARAMETERS command. The only
disadvantage of this over the alternative
SAMPLE-WEIGHTING-FIELD,
is that the calculation time is larger.
[Default is 6-point Gaussian integration.]
Only used with microscopic drift-line
integration.
Requests mid-point sampling of the weighting field over
a drift-path segment when computing the induced current.
[Default is 6-point Gaussian integration.]
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Formatted on 21/01/18 at 16:55.