News from PandaRoot: what happened in the last months and what is going to happen

17/05/2011

Stefano Spataro

News from PandaRoot: what happened in the

last months and what is going to happen

News from PandaRoot:what happened in the last months

and what is going to happen

Stefano Spataro

Tuesday, 17th May, 2011

ISTITUTO NAZIONALE

DI FISICA NUCLEARE

Sezione di Torino

for the computing groups

17/05/2011

Stefano Spataro



The PandaRoot framework

Alien2 based GRIDTracking TDR data challenge

compiled and running on more than 10 Linux platforms + Mac OS X

ROOT(5.26 5.29)

dynamic data structure(based on ROOT Trees and Folders)

use of many ROOT application(TGeo, EVE, TMVA, TMemStat)

Virtual Monte-Carlo(2.7b r537)

same geometry/codefor

Geant3Geant4 (9.2 9.4)

based on

CERN/ALICEFAIR/HADES-CBM-R3B

collaboration withexternal developers

May11

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Stefano Spataro



Central Tracker TDR

MVD: Bonn, Torino, Julich

p

STT:Pavia, Julich

TPC:Munich

GEM:GSI

DeadlineJune 2011

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Stefano Spataro



GRID Data Challenge 4

test of massive data productionfor the tracking TDR

Stability of PandaRoot code

GRID performance

Computing time for full reconstruction

Disk space required for full reconstruction

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Stefano Spataro



Simulation Data Sample

DPM Background events

MIN=2° (reduced Coulomb scattering)

3 energies pbar p @ 1.64 GeV/c pbar p @ 4 GeV/c pbar p @ 15 GeV/c

only Barrel SpectrometerTPC and STT setup – 150cm

3 GEM planes

1 Million events for each setup/energy

Total ~ 6 Mevents

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Stefano Spataro



GeometryFull Target Spectrometer

No Forward Spectrometer

Pipes (pipe+beam)

MVD

TPC/STT (150 cm)

GEM (3 planes)

DIRC

DISC

EMC

MDT

Coils

Yoke + Muon Filter

Geant3

Alice settings for TPC

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Stefano Spataro



Full Reconstruction

TPC

Geant3 (Alice) simulation

Full digitization

Lhe Tracking (MVD+TPC+GEM)

Correlation for PID

Available PID algorithms

STT

Geant3 simulation

Full digitization

Tracking (MVD+STT)

Correlation for PID

Available PID algorithms

Ready – minor fixesSomething to improveSomething missing

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Stefano Spataro



The GRID

Dubna busy GSI limited Torino off (local shutdown) Jobs submitted manually

Not the full GRID capabilities

Down Ready No Jobs

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Stefano Spataro



Maximum305 running jobs in parallel

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Stefano Spataro



Evaluation

http://panda-wiki.gsi.de/cgi-bin/view/Computing/DataChallenge4

Average DONE ratebefore subjobs resubmission: 95%after resubmission: 100%Good files (STT): 99%Good Files (TPC): 98%

Very high success rate!

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Stefano Spataro



CPU Time

STT

1.64 GeV/c 500 events ~ 60 min


15.0 GeV/c 1000 events ~ 3h 30 min

TPC



15.0 GeV/c 1000 events ~1h 40 min

Average events per day: 2.5M

STT Pattern Recognition slower than TPC LHE trackingTPC Pattern Recognition will need more time

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Stefano Spataro



File Sizes

TPC1.64 GeV/c ~ 200 kB/event

4.00 GeV/c ~ 250 kB/event


variations of 10-20% between different runs

STT1.64 GeV/c ~ 40 kB/event



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Stefano Spataro



AOD

STT

TPC

Parameters 3 MB/file 2 MB/file

Simulation 19 kB/evt 133 kB/evt

Digitization 9 kB/evt 6 kB/evt

Reconstruction 1 kB/evt < 58 kB/evt

Pid 2.2 kB/evt 2.3 kB/evt

Total ~40 kb/evt ~200 kB/evt

ESD

MC

“Differential” File Size

pbar p @ 4 GeV/c

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Stefano Spataro



Do we have really something useful?

STT setup445k Events - pbar p @ 4 GeV/c (DPM)

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Stefano Spataro



STT setup445k Events - pbar p @ 4 GeV/c (DPM)

EMC MVD

DIRC DISC

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Stefano Spataro



Simulation of Benchmark Channels

pp

pp

DDpp

npp

C

)3770(

)(

Still not assigned

Realistic ReconstructionCentral Tracker + MVD + GEM

Event Mixing

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Stefano Spataro



Reconstruction @ May

STT dE/dx done

PR with GEM done

Event Time Mixing done

TPC dE/dx something (?)

PR TPC big improvements

PR TPC+MVD no news

PR MVD+TPC+GEM no news

Event Time Mixing

Still several points to fixbefore starting production

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Stefano Spataro



EventTime

Mixing

G.Boca

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Stefano Spataro



G.Boca

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Stefano Spataro



Event Time Mixing

STT Mix with maximum 10 evts

PR 6 times slower

TPC Mix with 1000 evts

PR 1 evt 30 min

Room for improvements in pattern recognition code

17/05/2011

Stefano Spataro



First test of TPC dE/dx algorythm

TPC dE/dxVs

momentum

SUM

very primitive - it requires experts!

17/05/2011

Stefano Spataro



Tracking Particles

somethingwrong

fineresolution

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Stefano Spataro



Electron ID

Positive Particles Negative Particles

Ronald algorythm based on Bayes in PandaRoot

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Stefano Spataro



Muon ID

muons

pions

BARREL BARREL+EC EC+MF

BARREL BARREL+EC EC+MF

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Stefano Spataro



BARREL

@ 3 GeV/c

BARREL

@ 3 GeV/c

BARREL

@ 1 GeV/c

BARREL

@1 GeV/c

Muon ID

17/05/2011

Stefano Spataro



Trying to Summarize

Ongoing Activities for the tracking TDRThe GRID is going to be used for data production

Reconstruction is going to be finalized STT code almost ready

TPC needs a bit more time

For the analysisElectron ID possible

Muon ID possibleStudies on analysis tools

News from PandaRoot: what happened in the last months and what is going to happen

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