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ecolecol defines an elliptical collimator (the aperture is an ellipse, the
external profile in the transverse plane is a square).
Here, again, the longitudinal collimator structure is not taken into account.
Attributes:
l - length [m] (default 0)
xsize - horizontal aperture [m] (default set to boxSize)
ysize - vertical aperture [m] (default set to boxSize)
outR - limits external extent [m] in x and y of the collimator (default set to boxSize)
material - collimator material (default set to “Graphite”)
Example :
col2 : ecol,l=0.4*m, xsize=2*mm, ysize=1*mm, material="W"