Post on 18-Jan-2016
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CDF 2002Toward Physics
Richard J. TesarekFermilab
For the CDF Collaboration
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
OutlineCDF Run II Physics ProgramCDF II DetectorStatus
Where were we last yearProgress since then
Detector PerformanceMuon CalorimetryTracking SiliconParticle ID Trigger
Detector Operations Good News/Bad News
Offline ReconstructionPhysics for this Summer
Heavy FlavorQCDElectroweak
Near Term PlansSummary
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CDF Run II Physics GoalsPrecision top and electroweak physics
• Higgs Bounds
Discovery/Exclusion of light Higgs
Discovery/Exclusion of light SUSYSearches:
• Quark-lepton compositeness New particle substructure
• New dynamics New forces
• Extra dimensions New space/time structures
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CDF Run II Physics GoalsDetailed study of B hadrons
• CP violation• CKM constraints
sin(2) from B0/B0 J/ Ks
|Vtd/Vts| from B0-B0 and Bs-Bs flavor oscillations
• Lifetimes• Production cross section
Narrow window of opportunity
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CDF II Detector
All new electronicsNew trigger & DAQNew software
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CDF II DetectorComponents from run 1o Central and extension muon systemo Central & wall calorimeterso Solenoid & lots ‘ o steel
New for run 2o Forward muon detectorso Tracking systems
• Central tracker (COT)• Silicon tracker (L00, SVX, ISL)
o End plug calorimetero Luminosity Monitoro Time of flighto Front end electronics (132ns)o DAQ & triggero Software
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Last YearAccelerator turning on
Installing/connecting new detectors• Silicon• Forward muon detectors• Time of flight
Commissioning detectors• Reproducing commissioning run results• Fixing dead/hot channels• Correcting noisy channels
Commissioning trigger hardware• L1 track trigger• L2 trigger boards
Writing tuning software• L3 algorithms• Offline reconstruction
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
NowAccelerator tuning up
• Luminosity on the rise• Fewer beam related problems
Store Initial Luminosity
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
NowCDF Tuning upo More of experiment runningo Improving data taking efficiency
<Effic> = 67% Low=20% High=93%
Details follow…
Delivered Luminosity
To Tape
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Muon SystemsCentral & extension muon systems
Run IForward muon systems Run II
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Muon SystemsCentral & Extension Muon Detectors
• System commissioned and aligned• 95% live• Triggering on muon track stubs
Forward Muon Detectors (New)• System commissioned• 98% live• Alignment underway
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CalorimetryCentral calorimeters Run IPlug & forward calorimeters Run II
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Central CalorimeterRun I detector New electronicsFully commissioned last summero Energy Measurements
• 100% PMTs/electronics working• Energy scale calibrated to ~1%• Reproducing response maps of Run I
o Position Measurements• 99% chambers/electronics working• Energy response calibration in progress• Alignment to tracking ~5mm
o Reconstruction advancing
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Plug CalorimetersNew Detectors and new electronicsPb(Fe) scint. Sampling calorimeters
• Better E resolution• Extended coverage• More reliable
Fully commissioned last summerEnergy Measurement
• 100% PMTs/electronics working• Energy scale calibrated to ~1%
Forward calorimeter (Mini Plug)• Extend coverage in to • 47% instrumented
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Plug Shower MaxPosition Measurement in new
detectorNew electronicsCentral tracking only covers ~1/2 plug
calorimeter
• 99% PMTs/electronics working• Inter channel calibration complete
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Plug PerformanceCalorimeter 100% liveShower Max 99% liveCalibrations complete
(~1% scale uncertainty)
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Time of Flight (TOF)Identify p, K, up to 2 GeV
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Central TrackingNew Detector & ElectronicsSmaller cell sizeMulti-hit TDCsdE/dx encoded in pulse width
Hit resolution ~175mSingle track efficiency 100%
P (GeV)
dE/dx
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Detector X-ray
Map out Material in CDF
E loss and multiple scattering
Feed into MC
Close track pattern recognition
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
SiliconNew Large systemo L00:
• Improve d0
o SVXII:• Increased accept• 3D vertex finding
o ISL:• Increase tracking to eta=2
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Silicon CommissioningCommissioning in progress
• Problems are mostly fixed during access
• Accelerator related problems
Cooling problems in ISL
Initial alignment good (<50m) Trigger
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Luminosity MonitorCherenkov radiation detector
Increased segmentation in smaller area
• Less pile up at high rate• Decreased sensitivity to secondary
particles• Direct measure of luminous region
Timing and pulse height recorded
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Detector SummarySubsystem % Comments
Luminosity Monitor
100% Running
Silicon: L00 SVX ISL
97%90%60%
Runningcommissioningcooling+commissioning
Central Tracker (COT)
100% RunningMissing one cell from broken wire
Time-of-Flight 100% Running
Shower Max 99% Central aligned ~5mm
Calorimeters 100% Running
Muon: central forward
90%100%
Chamber currentsRunning
Forward Detectors
47% commissioning
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Trigger
L1: tracks, jets, leptons,ET, Missing ET
L2: impact parameter, calorimeter clusters
L3: full reconstruction
50 Hz
~20MB/s
300-500 Hz
45 kHz
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Silicon Vertex Trigger (SVT)Impact/displaced vertex trigger
Lxy
Beam spot
secondary vertex
R
PT
oInitial alignment < 50m
oReal time position to MCR
•Resolution 48 m
•Cut d0 > 120m
•c ~ 360um (B decays)
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Hadronic B TriggerTrigger on fully hadronic b decays
L1: >2 XFT tracks; PT > 1.5 GeV
L2: >2 SVT tracks; PT > 2.0 GeV; d0 >120 m
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
DAQ and OfflineDAQ:
Operating at design (20Mb/sec)Offline:
Processing keeping up with DAQ
DAQ: data to tape
Offline: data processed
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Operations“Smooth running until something
breaks”Muon chamber currents
• Run I: CMP currents ~1A• Run II: CMP currents ~10A
Power supply failuresSilicon problems
• October incident• April incident
ISL cooling• Blocked lines
Beam related backgrounds
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Power Supply FailuresI43 VME power supplies failed in the
collision hall since last year• Failures due to radiation soft power MOSFET
undergoing single event burnout
Solutions identified involving:o Power supply modification
• Adjust power supply operating conditions
• Install radiation hard components
o Installation of additional shielding
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
ISL Cooling (Angioplasty)
Status:•12 blocked lines blocked at installation
•5 lines cleared so far (6/9/02)
•Work continuing during shutdown
High power laser
To clear lines
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
B Physics ProgramStart with charmPlans for summer conferenceso Total direct inclusive charm cross
sectionpp cc + X
o Ds+ – D+ mass difference
Momentum scale calibrated Energy loss and multiple scattering
understood
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CharmSummer conferences
Ratio of branching ratioso D0K- : D0 D0K+K-
D0 D0K+
K-
D0K+
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
QCD + JetsParton distribution functions at high
• Transverse energy (ET)• Pseudorapidity (
Quark-lepton compositness
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
CDF Highest Et Dijet Event
• Jet ET1=403.3 GeV, 1=0.037• Jet ET2=322.0 GeV, 2=-0.364• Vertex z = 39.0 cm• Missing ET significance = 1.93
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Near Term Plans
Present Access• Clear ISL cooling lines• Install temporary shielding• Complete L2 trigger work
June-Oct 2002• Finish commissioning silicon• Take data• Summer conferences
Oct 2002 Shutdown• Install additional shielding (proton side)• Additional ISL cooling work
Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab
Summary
CDF II detector is off and running Most detectors working near 100% Detector performance
nearing/exceeding design spec Beginning to collect data with
higher efficiency Silicon still being commissioned Beam related backgrounds
First physics results this summerLook for more as the data arrives