Total weight 20,000 tons
yb0 1800 tons
ye1 1400 tons
115% test has been run
2112 turns 20.0 kA
13m long 3 meter radius
10 million silicon microstrips (10cm x 80 um)
80 million pixels (100x150 um’s) (25x180 um)
sigma_vertex r,phi 10 um z 20 um
200 square meters of silicon (~200 x larger than LEP era)
tracker layout p44
Status: TIB/TID/TOB/TEC modules completed
Module integration well under way.
Transportation to Point 5 Jan07
Pixels also in good shape. Pixel installation
after LHC pilot run. Jan08
June 10th:The final set of CMS tracker outer barrel silicon detectors left Lab B at Fermilab for delivery to the CERN laboratory in Geneva, Switzerland...
Inner Barrel (TIB), Outer Barrel (TOB), Inner Disks (TID) and Endcap (TEC).
In October it is expected that the first TIB half will be inserted into the TOB for the first time with combined commissioning expected to start soon after.
80,000 lead tungstate crystals
barrel APD (avalance photo-diodes)
endcap VPT (vacuum photo-triodes)
EB: Crystal production complete March 1,2007. Crystal production on schedule.
Modules complete end of April 2007.
EE: Crystals start arriving Sept 06
Assembly start Mid-March 2007.
DEE1 before pilot run Sept 07
DEE2 Dec 07
DEE3 mid Mar 08
DEE4 mid Apr 08
Two layers silicon detectors
Factor of 3x rejection of pi0 from gamma trigger
Barrel/Endcap:Brass Tiles, imbedded WLS fibers
Forward: Quartz Crystals imbedded in copper
Hybrid Photodiodes (HPD)
Optical readout ganged into HB1,HB2 for 17 brass/scint layers ad HB3 for outer two scint. layers
Readout 25 nsecs , conditioned ADC 3 bits range, 5 bits charge
ME 4176 channels
MB 7056 channels
MO 3864 channels
Status: HCAL MO,ME,MB done.
Hardware and Electronics Completed.
200 um resolution (phi)
with 6 planes unfolded area of football field
ganged wires (discriminator) 180K
strips (ADC 50nsec sampling) 240K
Status: 92% CSC installed/commissioned
Off chamber electronics 50% installed commissioned
HV production complete, 17% installed
250 chambers ArCo2 20%
v(drift)=55um/nsec -> total drift time ~700nsec
200 um resolution (phi)
Amp/Discr/TDC 200K channels
Status: Stats 144 chambers installed.
76 RPC+DT installation Nov 1,06-Dec 22,06.
Coarse position, fine timing
Barrel 80640 channels (amp/discr)
Endcap 92162 channels (amp/discr)
Status: Barrel Chambers completed, Mounting Integration ongoing
Endcap Chambers completed by end of 2006
3.2 usec latency
Regional Trigger Calorimeter (RCT) Global Muon Trigger(GMT) Global Trigger (GT) Global Calorimeter Trigger (GCT)
Status: RPC completion Nov 2006, CSC done, DT completion Nov 2006
ECAL barrel Sept 06, endcap Summer 07
GCT completion Mar 07
GT & GMT done
event size 1.5 Mbytes
Farm Reduction 100 KHz->100 Hz
Status: Sept 06 purchase 600 DAQ PC’s
600 DAQ PC’s Dec 06 (50KH rate)
600 more DAQ PC’s Dec 08 (100KHz rate)
Event rate 100 Hz x 2 Meg (event size) = 200 MB/s => 20 TB/day (probably 10 TB/day
with beam spills)
30 tape driver (~1 million $)
750 TB disk
presently used 5.7 FB total (~1 million $ tapes)
results 2.2GB/s =1 GB/s readback + 1.2 GB/s to tape
example IBM3592 40MB/s 600GB/tape $32,000
Early Running at sqrt(s)=900 GeV
Design luminosity 2x10^33
More detector computer commissioning than physics
Few W’s and Z’s
Sigma(mb) 50mb (UA5)
Minimum bias rate 5 Hz
Last Magnet Delivered Oct 2006
Last Magnet Tested Mar 2007
Machine Closed Aug 2007
First Collision Nov 2007
¼ magnets commissioned to 7TeV, rest commissioned to 1.2 TeV degaussing limit
rest (3/4) of magnets will be commissioned to 7TeV in winter 2007-8 shutdown