Detector Simulation Geant4 Activities at Fermilab

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Geant4 Development Detector Simulation at
Fermilab V. Daniel Elvira CD Project Report
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Outline

• Current/Future PSM Activities on Detector
  Simulations
• LHC Physics Center (LPC), CMS Experiment,
• Fermilab Users Support (J. Yarbas talk)
• Hints of a Tactical Plan (first draft already
  exists)
• New element is Geant4 tool kit development

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CMS Simulation News
The simulation chain in CMSSW_1_0_0 is a complete
set geometry, field, hits, digis for pixels,
strips, Ecal, Hcal, Muons (CSC, DT, RPC).
For Computing, Software, and Analysis gt 40
million Min Bias, Challenge (CSA06)
5.8 million ttbar,

gt 3 million Z to mm
Xeon(TM) CPU 3.6 GHz
Commissioning of the CMSSW simulation chain for
CSA06 (generator, G4 det simulation, digis) was a
big success LPC PSM had a lot to do with it
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CMS Simulations at the LPC
LPC-Simulations Group H. Cheung, D. Elvira
(Leaders), Provide support, generate expertise
to help USCMS institutions to carry out their own
simulation projects
Brown, Carnegie-Melon, Colorado, FNAL, FSU, KSU,
KU, Maryland, Mississippi, Northwestern,
Purdue-Calumet, Rutgers, Rockefeller,
SUNY-Buffalo, UIC (USA)

• Luminosity Monitoring System Simulation
• ECAL Crystal Response Studies
• Zero Degree Calorimeter (ZDC) in Simulation
• Forward Pixels Geometry and Simulation
• Geant4 physics validation using TB data
• Simulation Validation Suite
• GFlash parameterization of hadronic showers

Initiated at the LPC
(For details, look at June 6th report)
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PSM at the LPC
Responsibilities in international CMS
Simulation Group co-coordination Software
Validation Suite Group coordination (D.
Elvira). Julia Yarba is a key contributor to
infrastructure development, integration of
simulation chain and validation suite, testing
(debugging timing studies), and support
(questions, tutorials).
We have generated significant user based
simulation activity at the LPC and made a
difference in CMS with a relatively small
resource investment from CD/PSM.
If you are a member of international CMS and work
on simulations, the LPC is the best place to be
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Example The Software Validation Suite
Set of packages to automatically perform
release-to-release validation of generator,
simulation, reconstruction software.
S. Abdullin, H. Cheung, D. Elvira, J. Yarba
FNAL X. Huang -
Mayaguez (Puerto Rico), A. Kharchilava, M.
Strang -SUNY Buffalo, L. Shabalina - UIC many
more new people from US and international CMS
LPC original SVS group
Late in 2005 LPC Simulation Validation activity
was upgraded to a CMS Sofware Validation effort (
within the Software Group) September 2006
Software Detector Performance Validation CMS
plenary meeting Sofware/PRS cross boundary
group (D. Elvira P. Janot)

• New group potential to generate physics
  activity at the LPC.
• It pays off to bring your student or post-doc to
  the LPC. You can make a visible contribution to
  international CMS through the LPC.

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Hints of a PSM/Simulations Tactical Plan

• Detector Simulation.Goal
• Support and Advance the detector simulation needs
  associated
• with the Fermilab scientific program.
• Detector Simulation.Strategy
• Build a detector simulation core group at
  Fermilab.
• Develop expertise at the level of tool kit
  development among the members of the Fermilab
  detector simulation core group.
• Develop expertise at the level of detector
  simulation application among Fermilab users by
  initiating and stimulating simulation activity,
  as well as by providing direct support to
  projects and users.

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• Simulation/Detector Simulation
• Objectives for FY07
• Secure Fermilab membership in the Geant4
  Collaboration with full representation in the
  institutional boards.
• Initiate Geant4 development activities in the
  areas of numerical stability, time performance,
  hadronic physics, physics validation.
• Simulation/Detector Simulation/Geant4
  Development
• 3. Support of LHC Physics Center (LPC) and CMS
  simulation activities.
• Simulation/Detector Simulation/CMS Support
  Development
• Simulation/Detector Simulation/LPC Support
• 4. Support efforts towards building
  infrastructure to facilitate International Linear
  Collider simulation activity at Fermilab
• Simulation/Detector Simulation/ILC Support
  Development
• 5. General support to individual Fermilab
  Geant4 users at the application development
  level.
• Simulation/Detector Simulation/Geant4
  General Support

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Youll see in the draft details on

• Activity time, timescale, milestones, metrics
• Priorities
• Change Control
• Risk Assessment

Staffing
4.3
FTE 5. General Support (Internal Transfer-1 FTE)
0.7 FTE 3. LPC/CMS
infrastructure support (S. Banerjee-0.4 FTE,

D. Elvira-0.5 FTE,

J.Yarba-0.4 FTE) 1.3 FTE 2. Geant4
Development (S. Banerjee-0.6 FTE
D. Elvira-0.2 FTE
Internal
Transfer-0.3 FTE
M. Fischler/M. Paterno-0.6 FTE
J. Yarba-0.6 FTE)
2.3 FTE 4. Linear
Collider. Dont know how the lab will organize
this effort which would benefit from (2)
but will need significant extra help. This
item is really a place holder.
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Summary

• With very little man-power our proto-Geant4 core
  group initiated, enabled, and currently supports
  a significant amount of simulation activity
  related to Fermilab research programs.
• Follow model of creating user based teams for
  relevant projects. PSM never implemented a
  detector or performed a physics study for CMS.
• It is time to take the next step Geant4 toolkit
  development.
• Need to explore opportunities to collaborate with
  other Fermilab groups, user institutions. (Strong
  interest in hadronic physics HSSW at FNAL in
  Sep. 06.)
• Explore the possibility of external funding (ex.
  NSF).

Daniel to attend G4 Collaboration workshop Oct.
9-15th Are we ready to present a proposal based
on this plan ?