1. DCal Meeting

2. DCal Collaboration China Huazhong Normal University Finland
University of Jyvaskyla
France
LPSC Grenoble, Subatech Nantes, IPHC Strasbourg
Italy
INFN Catania, LNF Frascati,
Japan
Hiroshima University, University of Tokyo, University of Tsukuba,
Switzerland
CERN
USA
Lawrence Berkeley National Laboratory, Wayne State University, University of Houston, University of Tennessee, Lawrence Livermore National Laboratory, Yale University, Oak Ridge National Laboratory, Creighton University, Cal Poly San Luis Obispo, Purdue University

3. Major Meetings and Discussion Sessions
Upgrade Forum June 29th
July 9th Joint EMCal + DCal Technical Meeting
July 23rd DCal + ALICE Engineering Discussion
September 16, 17 Joint EMCal + DCAL Design Progress Meeting
October 14 DCal Engineering Discussion
Upgrade Forum October 19th
Weekly discussions between DCal Engineering and ALICE Technical
Coordination
DCal Planning and Coordination Meeting

4. Technical Developments
Define single scope objective = B-6. Now the focus of all physics studies and subsequent discussions with ALICE and with funding agencies. Adopt D-Cal super module concept
(16 strips)
Meeting
2. Engineering Constraints - Define construction, assembly and installation procedures to minimize interference with operational ALICE sub-systems
3. Adopt common support structure for D-Cal super module cradle and new PHOS cradle. Adopt common installation scheme for D-Cal and PHOS. Identify D-Cal/PHOS interface issues – weekly meetings
4. Examine access issues - Adopt design concepts to guarantee general subsystem access and and personnel safety access and egress

5. DCal Conceptual Design 1. B6 Configuration Now Selected
DCal – 6 super modules
Dh~0.7 4 3 2
PHOS – 5 modules shown
B6 Configuration allows largest possible jet radii in DCal

6. B6 Configuration - Super Module Concept
DCal
EMCal
Shortened DCal Super Module
- 16 strip modules (3 shown)
Installed h= 0 to ~0.7 (including PHOS)
Df ~20 degrees
Standard EMCal Super Module
- 24 strip modules (3 shown)
Installed h= 0 to ~0.7
Df ~20 degrees
Most labor intensive part of the project
Design finalized – ready to start

7. DCal + PHOS common cradle conceptual design
DCal + PHOS Cradle
Existing PHOS rails – required modification discussed below

8. Critical Path: Common PHOS-DCal cradle
Tentative schedule
End of November : conceptual design frozen
Early January 2010 : order of raw material
End of January 2010 : fabrication drawings completed
Early February : design review
End of February : tender
Early April : start of order administrative procedure
Mid October : fabrication completed in workshop, preassembly, tests, delivery procedure.
Early November 2011: shipping to CERN

9. Other integration issues PHOS rails
As designed, PHOS rails cannot be loaded with both PHOS_5 and DCal, but only one rail needs to be stiffer.
Tube shaped rail, roughly 500 x 425 x 25, OK for deflection, stress, stability, slightly more expensive than I-Beam rail
A rail of these dimensions Preserves the clearance for ALICE Services under PHOS Rails.
Services under existing PHOS rail

10. Funding Status
Japan: Funding in place. Very good progress on preparations for module construction. – critical path -scintillator delivery
China: Wuhan. Partial funding promised. Critical path - A lot of preparatory work still needed, finalize funding
France: Subatech, Grenoble and Strasbourg. Funding discussions with IN2P3 November 13th. Very Positive response. Construction and assembly facilities ready. Support cradle design nearing completion
USA: Funding discussion with DOE November 30th. Very positive response Final proposal due in February. Construction and assembly facilities ready. Critical path - finalize funding

11. Funding Status, Near term plans and schedule
Schedule Objective: completion of full DCal in time for winter 2010 – 2011 shutdown
Schedule realities:
completion of all detailed design and integration work
including new PHOS rail and cradle is on schedule.
No “show stoppers” foreseen in the remaining work.
Procurement process of cradle and new PHOS rail
must start very soon.
Most of the required detector production capability is
already in place. The balance (if any) can easily be
added in time for a late summer 2010 completion
Materials procurement may be the biggest problem

12. Extra Slides

13. Rail system on the cradle to move detectors along Z axis (like EMCal)
PHOS module carriage.
DCal super modules Carriage
Rails

14. PHOS cradle conceptual design
DCal rails
New PHOS cradle allows independent z-motion of individual PHOS module on DCal rails

15. Note: The scope of the DCal project includes replacing only a single PHOS rail. If Future addition of other HEAVY detectors is contemplated, then both rails should be replaced at this time providing funding can be found.

16. Note: The scope of the DCal project includes replacing only a single PHOS rail. If Future addition of other HEAVY detectors is contemplated, then both rails should be replaced at this time providing funding can be found.
Example of HEAVY:
A first step toward full
Azimuthal EMCal coverage

17. 4. Other integration issues Personnel Access inside L3

18. 4. Other integration issues Personnel Access inside L3
New access locations
New stairway locations

19. 4. Other integration issues Personnel Access inside L3
New access locations
No perturbation of
critical services

20. 4. Other integration issues Safety Access inside L3
Shuttle for
evacuation of
injured people
from C to A side