CMS Software and Physic project at HIPV. Karimäki

Scientific Advisory Board

Helsinki, June 5, 2006

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Outline

●Our mission●Project members●Members' special talents●Physics simulation overview●Electron/gamma overview●Geant4 work●Track based alignment of tracker elements●Grid computing●Test beam work●Plans and future challenges

Our mission

• Physics simulation

• Detector simulation

• Developing reconstruction algorithms

• Preparation for physics analysis, discovery potentials

• Developing calibration algorithms, particularly track based alignment and ECAL energy calibration

• Test beam on-line + off-line software and analysis

• To take care of our share of CMS computing challenge

• Computing, calibration and analysis of forthcoming real data!

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Project membersIn CMS

Jorma Tuominiemi Prof. Physicist 1990-Veikko Karimäki, PhD physicist 1990-Ritva Kinnunen, PhD physicist 1990- Kati Lassila-Perini, PhD physicist 1994-Sami Lehti, PhD physicist 1997-Tomas Linden, PhD physicist 1997-Aatos Heikkinen, PhD stud physicist 1996- Tapio Lampen, PhD stud physicist 1998-Jukka Nysten, PhD stud physicist 2000-Lauri Wendland, PhD stud physicist 1999-

In addition 2-4 Summer Trainees at CERN every yearTypical carrier path for young members: 1) CERN summer trainee

2) diploma on particle physics 3) PhD studies in the project

We are all physicists. Physics with real data is awaiting us next yearafter a very long period of preparations!

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Project members

Aatos,Geant4,expert of hadronicprocesses

Sami,physicssimulation&analysistalent

Tomas,computingspecialist,grid, clusters

Tapio,expert inTrackeralignmentwith tracks

iJorma,CMSProgramDirector

Ritva,physicssimulation&analysistalent

Le

Lauri,DAQ expertH->specialist

Kati,CMS User SupportCoordinator,e/gamma rec

Jukkae/detection,tracker/ecalbeam tests

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Physics simulation studieshttp://www.helsinki.fi/~karimaki/lhc/CMSReconstruction.html

• People involved: Ritva, Sami, Kati, Lauri, Aatos, Jukka, VK• MSSM H -> H± ->discovery potentials (Ritva, Sami, Lauri)• jet tagging for HLT and off-line (Lauri)• Tagging b jets with NN approach (Aatos, Sami)• Methods to enhance signal to background • CMKIN maintenance, kinematics generators interface (VK)

• Extensive contributions to the CMS PTDR Vol 2

• Active reporting in conferences• Referee work, thesis opponent (Ritva)• PhD thesis work (Lauri)

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Electron/photon physics & reconstr.http://www.helsinki.fi/~karimaki/lhc/CMSReconstruction.html

• Kati, Jukka N.• tracker/ECAL reconstruction• photon conversions in tracker• ECAL test beam activities• energy calibration algorithms

• Kati now a User Support Coordinator• PhD thesis work (Jukka)

Module border corrections• The measured

energy is reduced at the module borders as the particle goes through less material.

Module

Module borders

E1 E2

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Geant4 activitieshttp://www.helsinki.fi/~karimaki/lhc/CMSReconstruction.html

• Aatos (also Tapio contributed earlier)• Aatos member of Geant4 Steering Board

Jorma member of the Geant4 Oversight Board• Aatos co-coordinator of the Geant4 hadronic processes• nuclear evaporation model implemented (Tapio)• intranuclear cascade model implemented (Aatos)• production runs (Aatos, Tomas)• extensive students education activities (CERN & Helsinki)• organization of ”Finnish Geant4 symposia” (2002, 2005)• refereeing of Geant4 related papers in IEEE (Aatos)• acquired expertise is beneficial also for CMS work!

CMS Tracker

Artist viewTotal about 16000 modulesChallenging alignment task!

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Track based alignmenthttp://www.hip.fi/cms/swph/AlignmentSoftware.html

• Now Tapio and VK (earlier Aatos, Tomas, ...)

• Long term work and learning process

• Challenging mathematical formulations

• Innovation: H.I.P. algorithm (proved successful)

• Contributions to CMS PTDR Vol 1

• Active reporting in conferences (Tapio)

• PhD thesis work (Tapio)

Alignment can be crucial for new discoveries!http://www.hip.fi/research/cms/swph/AlignmentSoftware.html

CMS Pixel

Alignment activities

Alignment with tracks with HIP algorithm

Helsinki Silicon Beam Telescope

Cosmic Rack setup

CMS Pixel

Misalignment simulation of CMSparticipated in SW development: tools and ready-made misalignment scenarios

Quality control of Tracker Outer Barrel (TOB) rod manufacturing

hands-on insight to misalignments

Cosmic Rack

SiBT

T.Lampén, VK

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Grid computing at HIPhttp://www.hip.fi/research/cms/swph/grid.html

• Tomas, HIP grid coordinator• Designed and built Mill cluster at campus site• Ametisti cluster, part of M-grid of Finnish universities• Active participation in NDGF

– Tomas member of the CERN sub-committee• Several co-operation parties:

– Finnish IT Centre for Science (CSC)– HIP technology program– Dept of Physical Sciences

• Aiming at Tier 2 services for LHC experiments in Finland• Tier 1 for Nordic countries – a common effort• Funding request several MEUR – growing optimism

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Test beam workhttp://www.helsinki.fi/~karimaki/lhc/CMSReconstruction.html

• Co-operation with the HIP tracker project

• Helsinki Silicon Beam Telescope (SiBT)

• Off-line analysis of test beam data (Tapio)

• Data acquisition expertise (Lauri)

• Developed alignment ideas

• Also involved in radiation hardness studies

• Very fruitful collaboration with tracker project!http://www.hip.fi/cms/swph/CMSReconstruction.html

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Publications

• http://www.hip.fi/research/cms/swph/publAndNotes.html

– The group has been active in publishing, especially CMS Notes, Analysis Notes, Internal Notes and contribution to TDR’s: total about 90 publications since the change of millenium

– Also refereed articles in scientific journals and conferences: total about 75 publications since the change of millenium

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Conference and workshop organizations

The project members have organized a number of symposia and workshops:

– CERN School of Computing, Aug 21-Sep 1, 2006, Helsinki

– 2nd Nordic Grid Neighbourhood Conference, Otaniemi, 31.5. – 2.6., 2006

– 2nd Finnish Geant Workshop, Helsinki, 6-7 June, 2005

– 1st Finnish Geant Workshop, Helsinki, 2003

– The 3rd Nordugrid Workshop, 24-25 May, 2002

– Workshop on b / tau Physics at the LHC, 30.5.-1.6., 2002

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Plans and future challenges

1 year goal (until the start of data taking mid 2007):• active tuning of the experiment software + documentation• active involvement in optimizing the alignment strategies• active involvement in designing the analysis strategies• collaboration with the HIP tracker project (test beam)

long term (data taking and running the experiment):

need all (and even more) manpower to:• maintain + improve software with real data• gradually improve the software alignment• control the quality of data• do competitive physics analysis• strong response to the computing challengeIn short: computing, calibrations, physics analysis

Project evaluation 22.5.2006

http://www.hip.helsinki.fi/research/cms/swph/ProjectEvaluation220506/Sami_Physics_studies.ppt

Physics studies: S.Lehti, R.Kinnunen, L.Wendland

http://www.hip.helsinki.fi/research/cms/swph/ProjectEvaluation220506/Kati_egamma_physics.ppt

Electron/Gamma Physics: K.Lassila-Perini, J.Nysten

http://www.hip.helsinki.fi/research/cms/swph/ProjectEvaluation220506/Aatos_geant4_activities.pdf

Geant4 activities: A. Heikkinen

http://www.hip.helsinki.fi/research/cms/swph/ProjectEvaluation220506/Tapio_alignment.ppt

Detector alignment: T.Lampén

http://www.hip.helsinki.fi/research/cms/swph/ProjectEvaluation220506/Jukka_K_grid_computing_activities.pdf

Grid computing: J.Klem/ T.Lindén