DCal Meeting 12-16-09

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

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 12-16-09

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

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

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

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

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

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

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

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

Extra Slides

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

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

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.

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

4. Other integration issues Personnel Access inside L3

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

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

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