Linda R. Coney – 24th April 2009 Online Reconstruction & a little about Online Monitoring Linda R. Coney 18 August, 2009

Linda R. Coney – 24th April 2009

Online Reconstruction & a little about Online Monitoring

Linda R. Coney

18 August, 2009

Linda R. Coney – 18 August 2009

MICE Online

So far: DAQ front end Trigger Event Building Controls and Monitoring

Given that we are successfully running the experiment and creating data How do we know the equipment is working well? How do we check the data quality?

Two levels of real-time data quality checks Online Monitoring

Look at raw data for each board in the DAQ No translation into physical quantities

Online Reconstruction Initial look at analysis variables and detector information with geometry

Next: see Data Flow MICE notes 252 & 255


Online Monitoring


Online Monitoring

Run unpacker on DATE data Fill plots for each type of board

No geography information No reconstruction Boards have ID# but no information on what channel it is

Fill online monitoring histograms in real time while taking data Use to debug operations Provides data quality check Provide graphical interface to display plots

There are 3 overall types of plots because there are 3 types of board FADCs Scalar TDCs


Online Monitoring Histograms

Example of monitoring plots from data run in November08

Preset histograms

TOF position info, Scalars


Online Monitoring Actions

DAQ DATE Readout is finished Create framework for decoding data Implement unpacking for TOF, CKOV, KL Test data readout, unpacking, and monitoring with real-time data Include unpacking with G4MICE Create online monitoring plots for TOF, CKOV

Upgrade FADC firmware (7/09) Will decrease size of data

Modify FADC monitoring plots (7/09) Implement unpacking for Tracker (08/09) Create online monitoring plots for KL,Tracker, EMR (9/09, 2010) Implement unpacking for EMR (2009)


Online Reconstruction


Online Reconstruction

G4MICE uses the unpacker to look at data from DATE It then converts the raw data into information with physical meaning Goal:

Provide a fixed set of histograms to be filled during data taking These histograms will contain quantities that can give information about the

physics happening – a first look at analysis quantities Provides another data quality check

Are we taking the data we think we are? Are the detectors & beam behaving as planned?

Provide graphical interface to display plots Provide comparison plots for shifters

Not meant to be final results Collaboration chooses list of useful histograms

Preliminary list follows


MICE Schedule


Online Reconstruction Histograms

Step I TOF

# planes hit/event # slabs hit/event Pulse heights Distribution in x, y across TOF0, TOF1, TOF2 2D x vs y gives shape of beam Reconstructed time-of-flight Momentum if assume etc dt (plane 1 vs plane2) in TOF0, TOF1, TOF2 2D x vs y gives shape of beam RF phase calculated vs absolute time in spill

CKOV Light yield in CKOVA and in CKOVB Construct some CKOV measure using the two CKOVs

KL ??? PID determination

CKOV A B light yield vs TOF TOF vs PTracker Check x,y in TOF1 vs x,y in the tracker at input and similarly at the other end of the channel for TOF2

and tracker2



Step II & Beyond Tracker(s)

# planes hit/event # stations hit Pulse heights # points used in online reconstruction Muon px, py, pz, pT, p at the 2 tracker reference planes x,x’, y,y’ 1D, 2D plots of position at 2 tracker reference planes Light yield distributions for each station

PID determination CKOV A B light yield vs TOF TOF vs PTracker Check x,y in TOF1 vs x,y in Tracker1 at input and same for TOF2 and exit of Tracker2

Beam emittance, amplitude MICE Step III and IV – energy in Tracker1 vs energy in Tracker2 and DE MICE Step V and VI

DE vs RF phase DE vs absolute time

EMR ???



Step II & Beyond Input welcome on desired plots….



What is needed to produce these plots? Online Reconstruction farm G4MICE installed on farm TOF reconstruction CKOV reconstruction Tracker reconstruction KL reconstruction EMR reconstruction Calibration for all detectors

Unpacking code for each detector Check that G4MICE uses unpacker in a same way that Online Monitoring

uses unpacker


Current Status of Reconstruction

TOF Reconstruction and calibration well underway

CKOV reco same Tracker reconstruction

works

e+

+

+e+

+

+e+

+

+e+

+

+

Beam profile at TOF0


Online Reconstruction Farm

Installed two farm computers in MICE control room March 09 Total of three quad-core processors G4MICE installed on both Tests run

Reconstructed tracker cosmic ray test data 114 events/second

Ran simulation, digitization, and reconstruction of Step VI Simulation: ~262 events/second Simulation + Digi: ~236 events/second Reconstruction: ~1920 events/second



What is needed to produce these plots? Online Reconstruction farm G4MICE installed on farm TOF reconstruction CKOV reco Tracker reco KL reco ?? EMR reco

Unpacking code for each detector TOF, CKOV, GVA, KL Trackers, EMR (08/09, late 2009)

Check that G4MICE uses unpacker in same way that Online Monitoring uses unpacker

Can produce online monitoring plots with G4MICE Testing under way to compare to standard Online Monitoring plots (08/09)



What is needed to produce these plots for Step I? TOF reconstruction CKOV reco Tracker reco KL reco

Questions: Which reconstruction to use? What is current status of reco for each detector? Only code in official tested release used in Online Reco

If you have personal reconstruction code – needs to go through software group to be included/used.

Which calibration to use? Who does the calibration?


Conclusions

Now: Read out and decode DATE DAQ from MICE beam data Monitor Step I raw data quality and detector performance with Online

Monitoring Reconstruct TOF, CKOV, Tracker data

Next: Implement online reconstruction for Step I Goal to see first plots w/in 2 weeks time

Can practice with old data Start with TOFs and CKOV

Gather requests for Online Reco plots

Eventually: Include necessary information for further steps Routinely have shifters monitoring detectors and MICE physics in MLCR

Documents

Linda R. Coney – 24th April 2009 Online Reconstruction & a little about Online Monitoring Linda R. Coney 18 August, 2009