Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab CDF 2002 Toward Physics Richard J. Tesarek...

Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab

CDF 2002Toward Physics

Richard J. TesarekFermilab

For the CDF Collaboration


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


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


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


CDF II Detector

All new electronicsNew trigger & DAQNew software


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


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


NowAccelerator tuning up

• Luminosity on the rise• Fewer beam related problems

Store Initial Luminosity


NowCDF Tuning upo More of experiment runningo Improving data taking efficiency

<Effic> = 67% Low=20% High=93%

Details follow…

Delivered Luminosity

To Tape


Muon SystemsCentral & extension muon systems

Run IForward muon systems Run II


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


CalorimetryCentral calorimeters Run IPlug & forward calorimeters Run II


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


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


Plug Shower MaxPosition Measurement in new

detectorNew electronicsCentral tracking only covers ~1/2 plug

calorimeter

• 99% PMTs/electronics working• Inter channel calibration complete


Plug PerformanceCalorimeter 100% liveShower Max 99% liveCalibrations complete

(~1% scale uncertainty)


Time of Flight (TOF)Identify p, K, up to 2 GeV


Time of FlightK+K-


Central TrackingNew Detector & ElectronicsSmaller cell sizeMulti-hit TDCsdE/dx encoded in pulse width

Hit resolution ~175mSingle track efficiency 100%

P (GeV)

dE/dx


Detector X-ray

Map out Material in CDF

E loss and multiple scattering

Feed into MC

Close track pattern recognition


SiliconNew Large systemo L00:

• Improve d0

o SVXII:• Increased accept• 3D vertex finding

o ISL:• Increase tracking to eta=2


Silicon CommissioningCommissioning in progress

• Problems are mostly fixed during access

• Accelerator related problems

Cooling problems in ISL

Initial alignment good (<50m) Trigger


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


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


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


MISSING SLIDE

Fast Track Trigger (XFT)


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)


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


DAQ and OfflineDAQ:

Operating at design (20Mb/sec)Offline:

Processing keeping up with DAQ

DAQ: data to tape

Offline: data processed


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


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


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


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


CharmSummer conferences

Ratio of branching ratioso D0K- : D0 D0K+K-

D0 D0K+

K-

D0K+


QCD + JetsParton distribution functions at high

• Transverse energy (ET)• Pseudorapidity (

Quark-lepton compositness


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


W ReconstructionData quality good!


SearchesThe hunt is on!Z’ ->


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


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

Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab CDF 2002 Toward Physics Richard J. Tesarek...

Documents

Transcript of Fermilab Users Meeting June 10 2002 R.J. Tesarek Fermilab CDF 2002 Toward Physics Richard J. Tesarek...