1. SiD IR Layout M. Breidenbach, P. Burrows, T. Markiewicz
SiD Collaboration Meeting
16-17 December 2005
Fermilab

2. 2005.10.11 Discussion SiD Dimensions from 2005-05 files
Barrel radius=6.450m
Barrel half-length=2.775m
EC Yoke=3.12m thick
EC Yoke ends at 5.895m= m
Garage assembly requirements
3m shielding wall between beamline position & garage
Assuming self-shielding [which seems OK: see L. Keller, SLAC BDS mtg.] wall needed for commissioning only
5m free space between shield wall & rotated barrel yoke3
2m free + 2m assembly fixture+1m free
4m free space between rotated barrel yoke & rotated barrel HCAL
1m free + 2m assembly fixture+1m free
5m free space between rotated barrel HCAL & pit wall

3. Detector Access Guesstimates
Door support leg overhang=
3.2m~25% door height (=barrel diameter=12.9m)
Door opening=
3.0m
Free space to walk around door ends=
1.9m
Reserved radius =
8.0m (6.45 iron +1.55m services)
Free space between dressed barrel & pit walls=
2.0m
PACMAN annulus=
3.0m [1m Fe, 2m concrete]
Other
Tunnel diameter 3.2m
Assumed beam height=Barrel radius + 1m

4. SiD closed, on beamline, in 20m x 28m
Pit Wall
Barrel
Foot
Door
Tunnel
3.0 m
5.105 m
Mobile PAC1
Fixed PAC2
Foot
Shield Wall

5. R20 Detail 38cm OD Support Tube Crab 40cm OD SiD Aperture
1m wide platform

6. SiD open, on beamline, in 20m x 28m

7. Half SiD in 48m x 28m IR anamorphic scale
Shield Wall
3.00 m
5.00 m
Barrel Yoke rotated
6.45 m
4.00 m
HCAL rotated
6.45 m
5.00 m

8. SiD (closed) in 48m x 28m IR x-scale=y-scale

9. Elevation View Pit Elevation: 30m ? 1.000 Barrel-floor
12.90 Detector diameter
12.90 Free space above detector
3.000 Crane bridge and hook

10. Remaining Issues Door opening sequence
If 3.0m long PacMan moves over leg (how?) to outside
55cm clearance between door radius and PacMan seems marginal
On Shielding wall side, assuming shielding not needed after commissioning, infinite space available
On far side of garage, 10m is arbitrary
12m is approximate maximum for 2 IR Baseline Configuration
Push-Pull not analyzed yet
Maybe move it out radially, then back (in z) to tunnel wall
5.105m long PacMan either stays in position, surrounding final doublet/crab support platform, or itself opens radially to move to far walls, permitting 3.0m PacMan to open slightly & move back to pit wall
Many beamline devices including Crab Cavity within 14m of IP
It would be very, very good to have these devices in the tunnel
Suggest we adopt a 18m wide hall by minimizing to ~ZERO both:
1.9m free space at end when door opens (SLD was ~0.5m)
3.2m door support length
pocket in wall for door support legs
use legless scheme for earthquake proofing / moving

11. Si D Open in a 20m x 18m Data Pit
Support Legs in pockets, screw drive earthquake constraints, etc.
Pit Wall at z=+9m

12. Half SiD in 48m x 18m IR Hall Anamorphic scale

13. SiD (open) in 48m x 18m IR X scale = y scale