SDD Survey Status Report Mario Sitta on behalf

SDD Survey Status Report Mario Sitta (on behalf of Martin Poghosian) 20 Oct. 2008 1

Current status 20 Oct. 2008 2

ITS Overlaps Status Report Mario Sitta Univ. Piemonte Orientale INFN 20 Oct. 2008 3

The overlap saga: Episode #1382 In the ideal geometry: All ITS-FMD overlaps removed (but see later on) Two internal ITS (SPD services - SSD patch panel) overlap reappeared (probably my fault) An alternative solution must be found Then we have to afford the overlaps in the misaligned geometry. . . 20 Oct. 2008 4

Solved or put aside ? FMD-SPD services “solved” with different φ position for +Z and -Z modules (1 ÷ 3 deg. difference) ✓ ok, more realistic different vertical orientation of cooling tubes (1 deg. difference) ✓ ok, more realistic reduced cooling tubes Rin and Rout (1 mm each) bad, less material budget two modules removed (-Z side) bad, less material budget 20 Oct. 2008 5

But was it all our fault ? Maybe, maybe not. . . Let's see one ovlp = 0. 075 ITSSPDExtender FMD 3_wire Uhm. . . ok, let's move the Extender Solved 20 Oct. 2008 6

Let's see another one ovlp = 0. 05 ITSSPDCooling. Tube. Cone FMD 3_wire In current version: reduce Rin and Rout Unrealistic - and less material budget 20 Oct. 2008 7

What would be “realistic” ? ovlp = 0. 05 ITSSPDCooling. Tube. Cone Tube made of Inox 6 mm wide (Rout) 1 mm thick In the real world, which one would bend ? 20 Oct. 2008 FMD 3_wire Wire made of Steel 1 mm thick 8

The same otherwise ovlp = 0. 049 FMD 3_cooling_plate In current version: reduce Rin and Rout Unrealistic - and less material budget 20 Oct. 2008 ITSSPDCooling. Tube. Cone 9

Getting bored ? ovlp = 0. 049 FMD 3_cooling_plate Plate made of Aluminium 0. 33 mm thick Tube made of Inox 6 mm wide (Rout) 1 mm thick ITSSPDCooling. Tube. Cone In the real world, which one would bend ? 20 Oct. 2008 10

Summary Two remaining overlaps will be solved The original dimensions of reduced volumes will be reintroduced maximum effort to minimize any external overlaps Remaining overlaps must be solved from both sides (Alberto and me already made enough miracles) 20 Oct. 2008 11