Particle Physics Division

The D0 experiment through some numbers:

             -  Detector outer dimensions:   20 x 12 x 12  (in meters for length x height x width ),  weight: 5500 tons

             -  120 000  channels

             -  central detector composed of :

                              drift chamber (vertex detector), 

                              transition radiation detector (TRD under CEA-Saclay responsability)

                              central drift chamber et two end-caps bouchons for charged particles tracking

             -  Liquid Argon calorimeter (U/LAr em part, U-Niobium/Lar Had part, Cu/LAr  coarse Had central and Steel/LAr coarse Had endcaps)

                             55000 channels

                             in three cryostats of  5.2 m diameter (central:  3 m long,    two endcaps: 2.6 m long each)

                             20000 gallons (with storage dewar) of liquid argon

                             within a 1.8 T toroïd

             -  muons central chambers: 6624 drift cells (in 94 chambers)

             -  collaboration of more 500 scientists from 60 institutes from 15 countries

             -  more than 110 theses

 

• Tevatron Run 2  (2001- 2011) : proton anti-protons collision at 1.96 TeV,  crossing time 396 ns, 36x36 bunches

             - D0 upgrades between 1996-2001:

                       - new central and inner detectors

                              silicon microstrips vertex detector with 793 000 channels (SMT)

                              scintillating fibers tracking detector (200 km of fibers)  (CFT)

                              2 T solenoïd  (1 X_0) ,  2.7 m long,   1.4 m  diameter   (in front of the  calorimeter)

                       - preshower detectors:   central (CPS) and forward (FPS)

                       - new calorimeter electronics

                       - scintillation counters for the central muon detector

                       - forward muon detectors

                       - very forward proton detector (removed in 2007)

              - trigger rates  L1 =  1 kHz,   L3 = 50 Hz

              - typical data acquisition efficiency 85%

              - typical events size: 220 kb/events (more than 1.5 billions events for Run2a from 2002 to march 2006)

              - integrated luminosity at Run 2a 1.5 fb^-1

              - Run 2b from 2006 to 2011. Integrated luminosity of 10.5 fb^-1

              - collaboration of more than 600 scientists (50% non-US), from 88 institutes (38 US and 50 non-US)  from 19 countries

              - more than 300 defended phD

              - more than 350 publications