TRT Offline Software

DOE Visit, August 21st 2008

Outline:Outline:o TRT Commissioningo TRT Offline Software Activities o TRT Alignmento TRT Efficiency and Noise

Andrea Bocci

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TRT Offline SW Activities

o Since 2006 Duke (Bocci, Kruse, Benjamin) heavily involved in the TRT SW activities Started with the TRT alignment of SR1 cosmic data

o Bocci was also involved on the general coordination/management of such activities 2 years term

2007-2008: Deputy SW coordinator 2008-2009: SW coordinator

o Main responsibilities are: Coordinate and set priorities for the whole offline chain Coordinate the different subtask efforts Coordinate the TRT SW package updates with the ATLAS releases Enforce the ATLAS Event Data Model on all TRT SW code Participate in the overall management of the ATLAS software

along with the other subgroup coordinators etc,…

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TRT Offline SW Activities

o ByteStream Converter Manage the output from DAQ and port it to the offline

environment Correlated with Monitoring, Digitalization, Trigger, Condition

Database

o Monitoring Assure the quality of the data taken, the impact of the updates in

the SW, feedback to the hardware people, etc… Work at different stage and sophistication (online/offline, with

hits/full track, …)

o Detector Simulation/Digitalization (Klinkby E.) Detailed simulation (GEANT) of the TRT detector and

digitalization of the signal (including noise and other hardware effects)

At the end a Bystestream file identical to the one from the DAQ is produced

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TRT Offline SW Activities

o Alignment (Bocci, Kruse) Alignment of the TRT modules (barrel and endcap) using tracks Not degrade the detector intrinsic resolution for more than 20% Huge effort to obtain the ultimate precision for the tracking

o Run Time Tester (Benjamin, Bocci) Check the impact of the ATLAS software changes on the TRT

reconstruction A change in the tuning of GEANT made disappear the

Transition Radiation few months ago

o TRT Performance (Bocci, Kruse) Study the efficiency and noise of the TRT with data and give

feedback to hardware and simulation/digitalization people

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TRT Offline SW Activities

o Condition Database Assure the detector condition (on/off, straw noisy/dead, HV, etc…)

are ported to the offline world and taken into account in the reconstruction

Change with time, run by run or event by event: bookkeeping!!

o Calibration T0 and r-t relationship need to be updated/checked for each run Impact on the alignment (Bocci)

o Trigger Use of fast tracking in the TRT for triggering at Level 2

o Management Redistribute manpower, assign FDE for each OTP tasks, etc…

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TRT Commissioning

o TRT Barrel in commissioning phase for a long time (no cooling problem…)

o Cosmics data collected in different Milestone runs

o Not only precious for hardware/DAQ/operation activities but also for the offline ones Full test of the offline calibration Test of the DCS (detector conditions) information on offline

environment TRT SW group was the first one to implement and test it

Full test of the TRT monitor infrastructure (online, offline, Point 1, etc..)

Full test of the ByteStream (DAQ output = Offline input) compression/optimization scheme

o Limited statistics did not allow sophisticated studies for the efficiency and performance but it is going to improve pretty soon! 24/7 operation next week

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Alignment

o Duke has been the main developer of the alignment in the TRT Applied to SR1 cosmics, pit cosmics, simulated data, simulated

cosmics with B field

o ID alignment tested in the CSC exercise Align the detector with a particular misaligned geometry

o Implement the alignment in the daily operation First alignment of the data done every 24-hours, just after first

reconstruction at Tier0 and shipping to Tier1’s Monitor movements of the detector and correct for them

o Besides to be involved in the TRT alignment improvements Bocci is now part of the task force to reorganize the Inner Detector alignment code and prepare the framework to include the muon chamber.

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TRT Performance

o Duke (Bocci, Kruse) started the effort to study the performance of the TRT using real data Work initiated with cosmics taken at the surface Results were published on JINST (along with the alignment

results)

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TRT Performance

o We are continuing this work (Bocci is supervising a CERN summer student on this project) and we are extending it to collision data Important feedback to hardware people and for the tuning of the

simulation/digitalization

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Conclusions

o Duke Group has been having a major role in the TRT offline SW both on the management side and on directly on several tasks Alignment TRT Performance RTT Simulation/Digitalization

o We are also contributing on the understating of detector with data and on the offline commissioning

o We are eager to finally reconstruct particles from pp collisions in the TRT! Just few more weeks of wait…