6 radiation length study for UPGR16 + SSD

Study of the dead material in front and behind FGT.

3 versions of GEANT geometries were investigated:

• UPGR16 + current SSD w/ current cables
• UPGR16 w/ 'light' SSD (Alu support structure replaced by carbon, Cu cables replaced by Alu)
• UPGR16 without SSD, nor SSD cables

Plot below is just example of material using current SSD.

 Many more plots are in attached PDF, in particular figs 2a-c, 3a-c, 4a-c.