1. Final(?) Design of G0 Upstream Shielding Larry Bartoszek BARTOSZEK ENGINEERING 10/22/05

2. Summary I think I have incorporated all the features Possible exceptions: –Additional holes for the threaded rods that support the protective covers for the windows –What kind of polyethylene? (UHMW?) –Something I dont know about

3. Top octant of US shielding, no CEDs or Rohacell box

4. Closer view with near head rib turned off to increase visibility

5. Simplified Rohacell box shown

6. View looking downstream using full as- built CAD model Looks to me like there wont be a problem with the threaded rods interfering with the detectors

7. Top view with beam going up Beam Upstream head

8. Side elevation view with near ribs on the head turned off to expose the shielding Detectors have not been moved back here, so there is a small interference between top layer of poly and Rohacell box.

9. Exploded view of upstream shielding 1/16 Lead ¼ Aluminum ¼ Polyethylene

10. Conclusion Please give me your comments with any changes so I can get manufacturing drawings made and we can put this thing to bed (so to speak).