CMS 1.Goal of the experiment CMS is a general purpose apparatus for LHC designed to study the physics of p-p collisions at the center-of- mass energy of 14 TeV. The main goal of the experiment is the search for the Higgs boson and for the super- symmetric partners of known particles. The scientific program includes also detailed studies of the top quark and precision measurements of CP violation parameters in the b-system. The physics of heavy ion collisions, and, in particular, the clear identification of a new state of matter as the quark-gluon plasma will also be addressed. 2.Physics achievements in 2002 The experiment is still in construction, therefore no physics result has been achieved in Important results have been obtained from the R&D activity carried on for all sub-detectors including computing. The main goal of this phase of the experiment is a successful commissioning of the main detector components. 3.INFN contribution to the experiment in terms of manpower and financial support INFN researchers are involved in the following sub-detectors: Solenoidal Magnet, Tracker, Electromagnetic Calorimeter, Muon System and Computing. The total number of physicists and engineers working in CMS in 2002 is 252. They come from 13 INFN Laboratories and account for about 16% of the total number of CMS collaborators. Technicians are not included in these figures. The INFN financial support to CMS deliverables amounts to about 63.9 MCHF over an estimated total cost of the experiment around 500 MCHF. The overall INFN financial support to CMS for the year 2002 is 8141KEuro, including travel expenses and consumables.

4.Number of publications in refereed journals ~ 40 5.Number of talks at conferences (from INFN) ~ 20 6.Number of undergraduate and doctoral theses on the experiment 15 undergraduate and 8 doctoral theses 7.Leadership role in the experiment - Lorenzo Foa‘ : Chairman of the Collaboration Board - Rino Castaldi: Deputy Project Leader (Tracker) - Fabrizio Gasparini: Project Leader (Muon) - Cristiana Peroni: Finance Board - Guido Tonelli: Management Board and Finance Board 8.Innovative instruments 4T magnet; large area RPC’s; radiation-hard silicon detectors and read-out electronics; analog optical links; new crystals and APDs; new approach on trigger, data handling and computing. 9.Competing experiments ATLAS for the entire physics program. CDF and LHC-B for part of the program; ALICE for Heavy Ions physics. 10.International committees which have reviewed the experiment The most important one is the LHC Committee at CERN that monitors continuosly the progress of activities.

Milestones 2002 MUONS 8 MB3 May Further 8 MB3 October Production lines in Torino ready September Assembly test of the first mini-crateOctober RPC Decision on mass production January Production and test of the front end chips February Production stations 2 and 3 CW June HV system prototype readyJuly Production and test of all FE boards September Production station 1 CWOctober ECAL Quality check on 2000 crystalsJune* Quality check on 6000 crystals (20% of the total)December* Assembly and test of 5 modulesJune* Assembly and test of 12 modules (15% of the total)December* Test of 12 HV boardsJune Test of 36 HV boards (25% of the total)December Production of 26 gridsJune Production of 52 grids (36% of the total) *These items are subject to the delivery in time of parts (like crystals or photo-detectors) supposed to be delivered by other Institutions.

Milestones 2002 TRACKER 40 modules M200 produced January System test (6 modules in a string) March Final specifications optical hybridMay Start-up of module productionJune Final specifications Power SupplyOctober 400 modules producedDecember Layer 1 mechanical structure December MAGNET Impregnated prototype ready January Module CB-2 impregnated April Module CB-1 impregnatedJuly Module CB0 impregnatedOctober COMPUTING All sites operationalMarch One half of the sites working in integrated modeApril Test of Data Base distribution within sitesJune 4 Tier2 initial prototypes readyOctober MC production of 20% of the events needed by CMSDecember

Milestones 2003 DT First MB4 chamber assembled in TorinoMarch Start mass assembly of minicratesJune Test of chambers and of the trigger system on 25ns beamJune Assembly line in Torino working at planned production rateJuly Installation of the central wheelOctober 18 MB3 chambers ready (35 since the beginning)December RPC Protocol and test system with cosmic rays frozenJanuary All assembly and test sites in operationMarch Production and test of 100 W-O stationsApril Production and test of 100 W-1 stationsDecember Pre-production of the HV/LV system December ECAL Cooling system for SM1 designedJune QC of 9600 crystals (15600 since the beginning) December Assembly and test of 24 modules (36 since the beginning)December Test of 36 HV boards December Production of 52 grids (104 since the beginning)December Production of 16 superbasketsDecember Test of SM1December

Milestones 2003 TRACKER 200 TIB modules assembled and testedFebruary System test of the TIB DS layersApril First TID disk manufactured June Tender for the Power Supply System July 1400 TIB-TID modules assembledDecember TIB/TID structural parts readyDecember MAGNET CB-1 module impregnatedApril CB-0 module impregnated July CB+1 module impregnatedSeptember CB+2 module impregnatedDecember COMPUTING 50% GRID sites enabled April Production prototypes for LCG (Tier1+Tier2) readyJune New analysis environment for CMS installed and workingJune 50% Sites operational with the new software October Participation of Tier1and of 50% of Tier2 to the 5% Data ChallengeDecember