1. Robert Pak DOE Review Jan. 19, 2005

2. Robert Pak 1 DOE Review Jan. 19, 2005 VTX HBD PHENIX Central Region From VTX Proposal (dims in mm) Integrate Detector Upgrades

3. Robert Pak 2 DOE Review Jan. 19, 2005 HYTEC Structural Results GFRP sandwich composite M55J for the base structure substantial gain in the stiffness to weight ratio similar rad length and strength most widely used standard Outer frame structure should be single diameter Structural end disks to prevent deformation of the structure under dynamic load inputs

4. Robert Pak 3 DOE Review Jan. 19, 2005 HYTEC Cooling Results Use ladder, or stave, concept supported at its ends by composite rings Stave structure comprises a C-C thermal plane OMEGA shaped composite bonded to back of thermal plane adds stiffness Cooling tube bonded to the back of the C-C thermal plane with C-C tube support Use Al cooling tubes 3mm in diameter supplied with a 23 g/s single-phase perfluorocarbon fluid, C 5 F 12

5. Robert Pak 4 DOE Review Jan. 19, 2005 VTX Spec Sheet Already consider barrel and endcaps aid to visualizing integration streamline engineering For next round with HYTEC

6. Robert Pak 5 DOE Review Jan. 19, 2005 Mechanical Engineering for VTX Core design group assembled PHENIX BNL Engineer D. Lynch: Work on PHENIX central region, which includes VTX Engineering specific to VTX being done at LANL by W. Sondheim & J. Boissevain In consultation with PHENIX BNL engineer (off project) Point of contact with HYTEC D. Lee & R. Pak to provide oversight

7. Robert Pak 6 DOE Review Jan. 19, 2005 Pretty Picture From J. Boissevain

8. Robert Pak 7 DOE Review Jan. 19, 2005 w/ the Endcaps

9. Robert Pak 8 DOE Review Jan. 19, 2005 Be Beam Pipe Desirable to get as close as possible to collision vertex w/o adding considerable radiation length In discussion w/: PHENIX BNL Engineer (P. Kroon) 0.3 +/- 0.1cm clearance between beam pipe and 1 st Si layer to get VTX concentric with the beam CAD Head of Vacuum Group (D. Hseuh) 3cm diameter probably OK Require NEG coating AP Upgrades Coordinator (W. Fischer) Physical aperture of at least 5 transverse rms beam sizes (allowing for 5mm orbit error) is OK

10. Robert Pak 9 DOE Review Jan. 19, 2005 Be Beam Pipe Quote Off project

11. Robert Pak 10 DOE Review Jan. 19, 2005 Mylar Sleeve Proper grounding & isolation of Si detector Image charge from circulating beam Aluminized Mylar sleeve around Be beam pipe Few  m’s thick to hold down material budget Grounded w/ braid through magnet No interference with other sub-systems; nothing else between beam pipe and 1 st pixel layer

12. Robert Pak 11 DOE Review Jan. 19, 2005 VTX Mechanical Support Structure Frame for barrel & endcaps (HYTEC and LANL) External support structure in central magnet (BNL) Mechanical tolerances/distortions: < 25  m internally 100  m relative to the rest of the detector From CAD Survey Group (F. Karl): 50 – 100  m on the bench 100 – 200  m in the hall

13. Robert Pak 12 DOE Review Jan. 19, 2005 VTX Mech Support Structure (cont) Clamshell Design: Separates into two halves along the vertical axis Modular Design: Easily removable from IR Allow for staged instrumentation Mounted off of pole tips/nose cone calorimeter To maintain specified tolerances

14. Robert Pak 13 DOE Review Jan. 19, 2005 Routing for VTX Services Power, cooling and signal services are brought in at both ends, using the entire perimeter

15. Robert Pak 14 DOE Review Jan. 19, 2005 VTX Auxiliary Systems Services routed radially at the pole tips: Power for Si detectors (proper grounding & isolation): Si HV & LV power supplies Cooling system for Si Operating temperature: < 10 o C Improve signal/noise performance Improve response to radiation dosage Dry Air System Bleed boil off from LN2 buggy into enclosure Radiation Monitoring TLDs & Chipmunks

16. Robert Pak 15 DOE Review Jan. 19, 2005 Infrastructure for VTX Electronics racks Platforms above central magnet Cooling for electronics Power for auxiliary systems (proper grounding & isolation): Clean & dirty power 110V & 208V UPS

17. Robert Pak 16 DOE Review Jan. 19, 2005 Mechanical Structure

18. Robert Pak 17 DOE Review Jan. 19, 2005 Mechanical Structure Budget Based on HYTEC cost matrix

19. Robert Pak 18 DOE Review Jan. 19, 2005 Assembly of VTX

20. Robert Pak 19 DOE Review Jan. 19, 2005 Assembly of VTX Budget

21. Robert Pak 20 DOE Review Jan. 19, 2005 Infrastructure/Installation

22. Robert Pak 21 DOE Review Jan. 19, 2005 Infrastructure/Installation Budget

23. Robert Pak 22 DOE Review Jan. 19, 2005 Closing Remarks Additional people power: PHENIX-BNL Operations Group has 8 FTE technicians and 3 FTE engineers VTX project will have a number of postdocs & students participating in these tasks CA Experiment Support Group provides at least one mechanical engineer plus trades people (carpenters, riggers and electricians)

24. Robert Pak 23 DOE Review Jan. 19, 2005 Backups

25. Robert Pak 24 DOE Review Jan. 19, 2005 VTX Design Criteria for HYTEC Clamshell Design: Separates into two halves along the vertical axis Detector Coverage: Hermeticity: single overlap circumferentially 160 o coverage in each half of barrel section 4 layers of pixels and/or strip detectors in barrel section 180 o coverage in each half of the endcap sections 4 layers of pixel detectors in endcap sections +/- 40 o Envelope maintained around barrel section Endcap pixel disks, utilities, and barrel detector end support outside of envelope Main clamshell support structure inside of envelope, but less than 0.5% radiation length (RL)

26. Robert Pak 25 DOE Review Jan. 19, 2005 VTX Design Criteria for HYTEC (cont) RL of 1% or less for each detector layer (includes: detectors, structure, and utilities) Dimensional and structural stability of less than 25 µm for detectors and 100 µm gravitational structural stability of entire tracker Utility Routing: Along barrel end support for barrel region Radial at pole tips for the end caps Mounting of Tracker: Off of magnet pole tips Tracker to behave as a rigid body structure Operating Temperature: Room temperature (or possibly 0 o C)

27. Robert Pak 26 DOE Review Jan. 19, 2005 HYTEC Cost Matrix + 15 + 20 <10 centigrade Staging Barrel/Endcap R&D 2005 DOE Proposal Updated 1/14/05

28. Robert Pak 27 DOE Review Jan. 19, 2005 Methods: Contingency Design/prototype/testing : 25% contingency each cycle To cover cost risk that an extra pre-production cycle is needed Last design/prototype/testing cycle : 50% contingency Testing, assembly, and installation tasks: 50% contingency Purchases based on vendor quotes: 25% contingency Other purchases, 50% contingency

29. Robert Pak 28 DOE Review Jan. 19, 2005 Methods: Overhead All numbers quoted for manpower are fully loaded $ Material costs include local overhead + sales-tax Funds moved from BNL to other institutions charged 9% BNL admin. overhead