Graduate Student's experience in learning, exploring and ... · Graduate Student's experience in...
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Oct 8th 2012 EIC R&D @ BNL 1
Graduate Student's experience in learning, exploring and using
FAIRROOTBy
Kunnawalkam RaghavStony Brook University, [email protected]
EIC Detector R&D Simulation Workshop Oct 8th 2012
Brookhaven National Laboratory
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Oct 8th 2012 EIC R&D @ BNL 2
Acknowledgements
● EIC R&D organizers, BNL EIC task force
● Dr. Abhay Deshpande, Dr. Klaus Dehmelt
Stony Brook University● Dr. Mohammad Al-Turany, Dr. Florian Uhlig, Dr. Radoslaw
Karabowicz
GSI, Damstadt ● Dr. Stefano Spataro
University of Turin● Will Forman, Yakov Kulinich and Raphael Cervantes
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Oct 8th 2012 EIC R&D @ BNL 3
Installing Fairroot
● Integration of different concepts
● No real documentation available
● Continuous conversation with people at GSI
● Heavily dependent on Libraries (which are really hard to understand)
● 1 month – from downloading package to running the example (at start)
● Now less than a couple of hours (depending on the speed of computer)
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Oct 8th 2012 EIC R&D @ BNL 4
Running Examples
● Rutherford Experiment
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Oct 8th 2012 EIC R&D @ BNL 5
Building a New Detector
● Create a copy of Rutherford that works
● Start modifying that copy
● Hopefully end up with another detector that works.
● Lots of copying and pasting, renaming the classes etc...
● Structure available at PANDAROOT
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Oct 8th 2012 EIC R&D @ BNL 6
Creating EIC Detector – Geometry Files
https://wiki.bnl.gov/eic/index.php/Detector_Design
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Oct 8th 2012 EIC R&D @ BNL 7
Creating EIC – Detector ClassesEICROOT
Passive Components Detectors
...HTCKEMCA...Magnet Pipe
FairEmca.cxxFairEmcaPoint.cxxFairEmcaGeo.cxxFairEmcaGeoPar.cxxFairEmcaContFact.cxxFairEmcaHit.cxxFairEmcaHitProducer.cxx
FairMagnet.cxxFairMagnetGeo.cxx
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Oct 8th 2012 EIC R&D @ BNL 8
Running “EICROOT”
Tracker Barrel Tracker
DIRCEMCA EMLF
Silicon Tracker
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Oct 8th 2012 EIC R&D @ BNL 9
HTCK RICH
Solenoid Magnet Whole EIC Detector Whole EIC Detector showing one event
HACA
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Oct 8th 2012 EIC R&D @ BNL 10
Physics Analysis
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Oct 8th 2012 EIC R&D @ BNL 11
Fairroot on RCF
● /direct/eic+u/raghavke/EICROOT/
● Integrated with FastJet 3.0.3
● Env variables set in /direct/eic+u/raghavke/config.csh
● Macros (for running EIC and Jet analysis) available at $EICWORKDIR
● Lepto-quark detector simulation study → comparing jet-widths from tau decays and DIS jets
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Oct 8th 2012 EIC R&D @ BNL 12
Creating EIC in Fairroot● Current
– Build is in Fairroot (learning period)
– Digitization and Reconstruction only for EMCA
– No PID/tracking without event display.● Near future
– Excited at the prospect of collaborating with BNL EIC task force
– Standalone EICROOT
– Individualized detector classes (hit production / reconstruction)
– Add Fast simulations as an option