DCal Meeting 12-16-09

DCal CollaborationChinaHuazhong Normal University

FinlandUniversity of Jyvaskyla

France LPSC Grenoble, Subatech Nantes, IPHC Strasbourg

ItalyINFN Catania, LNF Frascati,

JapanHiroshima University, University of Tokyo, University of Tsukuba,

SwitzerlandCERN

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 DevelopmentsDefine 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)

Meeting2.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

234B6 Configuration allows largest possible jet radii in DCalPHOS 5 modules shownDCal 6 super modulesDh~0.7 DCal Conceptual Design 1. B6 Configuration Now Selected

B6 Configuration - Super Module ConceptStandard EMCal Super Module- 24 strip modules (3 shown) Installed h= 0 to ~0.7 Df ~20 degreesShortened DCal Super Module- 16 strip modules (3 shown) Installed h= 0 to ~0.7 (including PHOS) Df ~20 degreesDCalEMCalMost labor intensive part of the projectDesign finalized ready to start

DCal + PHOS common cradleconceptual designExisting PHOS rails required modification discussed belowDCal + PHOS Cradle

Critical Path: Common PHOS-DCal cradleTentative schedule

End of November : conceptual design frozenEarly January 2010 : order of raw materialEnd of January 2010 : fabrication drawings completedEarly February : design reviewEnd of February : tender Early April : start of order administrative procedureMid October : fabrication completed in workshop, preassembly, tests, delivery procedure.Early November 2011: shipping to CERN

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. Other integration issues

PHOS railsServices 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 CarriageRails

PHOS cradleconceptual designDCal railsNew 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

New access locations4. Other integration issues

Personnel Access inside L3New stairway locations

New access locations4. Other integration issues

Personnel Access inside L3No perturbation of critical services

Shuttle forevacuation ofinjured peoplefrom C to A side4. Other integration issues Safety Access inside L3