You can see the radiation thickness of the detector at definite positions
and the radiation thickness of most of the superlayers for a given
geometry version if you click below.
Beginning from versions 99.1015 and 0.0903 the mean values are obtained
from minimum bias event which are traced with switching off the magnetic
field and all types of interactions and energy losses.
Note that all volumes which do not belong to one of the listed superlayers
(vessel endcup, beampipe etc) are taken into account only in "radiation
length at different positions", but not in individual superlayers.
Whenever a track touches only vaccum or air within one superlayer it will no
give contributions to the radiation length - thus rl = 0 contributions will be
July 28. 2000