Some remarks on geometry:
As compared to the previous set-up, in the present layout
excluded -
Stations 3,4,5,6 of the Inner and Outer tracker,
added -
Plug into the Hadron calorimeter. Space between the inner edge of the HCAL active material and the vacuum pipe is filled with iron. Location of the plug in z 1330 - 1500 cm.
Up- and downstream dipoles at z=-665--325 cm and 2012-2052 with cross-section of 87*67cm made of iron.
Scoring at RICH1 location and more detailed scoring at IT locations.
Concrete tunnel below RICH2 is made narrower (in Y) according to the engineering drawings.
Carbon fiber support plates for the VELO sensors.
Concrete shielding between the upstream dipole and vacuum tank in the region of z=-300 - -180 cm.
Detailed scoring in the VELO region.