ALICE USA

1. ALICE USA ALICE position towards US participation EU participation in emcal Requirements Formal steps & schedule J. Schukraft

2. ALICE position towards US participation • ALICE = heavy ion community active at CERN • onededicated, general purpose heavy ion experiment • ~ 90% of community, 100% EU funding (~ 5% ‘only’ SPS, ~ few % CMS/Atlas) • ALICE is very supportive of a significant US participation • Physics of US project: • jet physics is definitely one of the (the ?) hottest topic at LHC • calorimeter instrumental for sensible & sensitive jet measurements • Know-how transfer: • physics & experience from RHIC (first HI collider) VERY relevant at LHC • Science Policy: • continue tradition of inter-regional collaboration in HI: AGS-SPS-RHIC -> LHC ? • > 25 Institutes, > 10M$ investment of ALICE members at RHIC • was instrumental to coordination and success of the field • recognized & explicitly supported by eg by NuPecc, OECD-megascience forum, NSAC

3. Non-US participation in emcal • expressed intention to participate • France: • Nantes, Strasbourg, Grenoble (new Institute) • Italy: • Catania (2 groups), Frascati (new Institute, Hermes) • Other: • IHEP Protvino, CERN (Infrastructure & Installation) • manpower: 30 physicists, > 15 tech+eng • considerable technical & infrastructure support in several labs • participation has already started • manufacturing & installation of emcal support rails • done in 2004 (early, for technical reasons) • FEE (PHOS) and ALICE-DAQ system for emcal test beam • material & support (CERN) • mechanical design & engineering for support structures etc.. • ongoing (Nantes) • several US-EU meetings to coordinate efforts

4. Scope & Timeline • scope of non-US participation • France & Italy expect to provide the equivalent of 3 Supermodules • assuming current US costing, as applicable to EU funding • ALICE-CERN will provide general infrastructure, integration and DAQsupport • at the same level as for all other ALICE subsystems • timeline • National (F+I) ALICE institutes have discussed and agreed emcal participation • first contacts with INFN/IN2P3; very positive response • funding application in 2006; first construction money could be available early 2007 • envisage 3 year funding and construction period (’07-’09) • R&D + travel funds already in 2006 • increased eng/tech manpower will be available already in 2006 • formal requirements @ CERN • emcal project has been regularly, but informally, discussed with CERN/LHCC/RRB • submit ‘Technical Proposal’ to LHCC by 19 April 2006, approval ~ Sept. • required for EU funding early 2007 ! • submit ‘Technical Design Report’ by end 2006 or early 2007

5. emcal Schedule • driven by physics priority & LHC HI schedule • jet quenching is one of the most promising, highest priority topics at LHC • it can and will be addressed in the initial part of the program (first ~ 5 years) • needs substantial Luminosity (~ 0.5 nb-1) and pA comparison data (= RHIC) • LHC schedule • detector & machine commissioning with pp (≠ RHIC) • even being conservative, reasonable pp lumi before end 2008 • first Pb-Pb run end 2008 should give >> 106 central events • => few 103 jets > 100 GeV in |h|<0.5 for 106untriggered events ! • 2009 + 2010: accumulate Pb-Pb Lumi to about 1 nb-1 • 2011 (or 2010, like RHIC, depending on physics priority) : pA comparison • 2012 and after: systematic scans (E, beam type), new physics topics, … High pt and jet physics will start in 2008 !

8. EMCAL • LHC schedule • emcal needs substantial Luminosity (~ 0.5 nb-1) and pA comparison data (= RHIC) • 2009 + 2010: accumulate Pb-Pb Lumi to about 1 nb-1 • 2011 (or 2010, like RHIC, depending on physics priority) : pA comparison • 2012 and after: systematic scans (E, beam type), new physics topics, … • emcal scheduleforguaranteed minimum physicsprogram in the‘foreseeable LHC future’ • emcal needs to be complete and commissioned by October 2010 (Run 3) • latest installation window: winter 2009/2010 (=> ready for Nov 2009) • have reasonable fraction (~ 50%) for 2009 run (Nov 2008) • use untriggered data for trigger bias studies • commission trigger • start of physics • 1 module in 2008 (Nov 2007) highly desirable • test & commission hardware & software • ‘participate in the most exciting first data taking’

9. Joining ALICE • General requirements (~ identical for all LHC experiments) • documented in Memoranda of Understanding • construction MoU, M&O MoU, 2 Computing MoU’s (1/expt, 1 for LCG) • contribute to the Collaboration commensurate with their strength • project specific hardware (i.e. emcal) • take fair share in ‘common tasks’ • Common Fund, M&O, computing • Common Fund (CF) • ALICE = 10% of capital investmentAtlas=44%/CMS=33%/LHCb=26% • common elements (local infrastructure, magnet, vacuum chamber, …) • cash:45 kCHF/Institute (5 kCHF/Institute/year 1998 –> 2006) • newcomers: payment schedule to be agreed • remaining: cash or ‘in kind’ (delivery of items included in the CF) • ALICE agrees to account emcal support structure to complete remaining CF • Computing • Grid computing: shared resources (T0/T1/T2 centers) + local resources (T3) • ALICE agrees that the ‘fair share’ amounts to 6% of the ALICE T1+T2 requests • based on our current understanding of the scope of the US contribution (30 PhD)

10. M&O • Maintenance & Operation (of ALICE) • include ALICE specific items & CERN general services (new since 2002) • ‘pro rata’ accounting, based on ‘PhD or equivalent’ (i.e. students are free) • reviewed and agreed by the Funding Agencies yearly (‘RRB’) • approx cost/PhD:~ 10 kCHF(2007), ~ 14 kCHF( 2008 and beyond)