[12gevmoller_sim] Moller sim commit: r209 - in prexsim/trunk: geometry src

[zana at jlab.org]

Author: zana
Date: 2012-08-08 11:49:34 -0400 (Wed, 08 Aug 2012)
New Revision: 209

Modified:
   prexsim/trunk/geometry/prexIMother_pedestal.xml
   prexsim/trunk/src/MollerDetectorConstruction.cc
Log:
Improved the scattering chamber design in order to adjust the thickness at each level. Some issue still present with the visualization and QT for the (really) thin foil surrounding the target. This is probably due to the fact that OpenGL does not draw circles, but it approximate the with 24 faces polyendrons. If the tube is too thin for his radius this creates issues in the drawing (QT fail), because the faces of the polyhedron will not be included in the thin layer, but will intersect it multiple times. The problem is solved if, at drawing time one makes the thickness of this part 10 times bigger (so 0.5cm , rather than 0.05cm). Geant4 does not have any issue with this, so, if runned in batch mode (no graphic), the real thickness should be used. For semplicity, this value is posted on the top of the file (name = real_sc_thick_4 ) . In order to have a better picture of the area, I changed the color of Stainless Steel to blue