# Presentation: 940154

## Detector Simulationsat FNAL

- Amber Boehnlein
- FNAL
- 5/15/2007

## Detector Simulation at FNAL

- _[Physics Generators ](http://cepa.fnal.gov/patriot/)_

***Experiment Program Support ***

***ILC detector optimization***

- Outside scope

**Notes:**
The importance of high quality, well understood simulations cannot be overstated.
Design optimization for future accelerators and future detectors
Tuning and validating reconstruction code prior to CMS physics running
Understanding detection efficiencies and acceptance and other performance attributes
Modeling physical processes 
The importance of high quality, well understood simulations cannot be overstated.
Design optimization for future accelerators and future detectors
Tuning and validating reconstruction code prior to CMS physics running
Understanding detection efficiencies and acceptance and other performance attributes
Modeling physical processes 

## A Sampling of Simulation Tools

- _[GEANT4](http://geant4.web.cern.ch/geant4/)_ is a commonly used set of tools that simulates the transport ofparticles through matter.
- Used in high energy, nuclear astro-physics and medical applications
- Long history of providing a coherent set of simulation tools
- GEANT4 is an international collaboration centered at CERN
- FNAL recently joined GEANT4 as collaborators
- Technical performance in robustness and timing
- Hadronic Shower Model Development and Validation
- Includes documenting existing studies
- GEANT4 is used at FNAL for the CMS detector simulation,  ILC simulations, particle astro-physics and the neutrino program.
- _[MARS simulation](http://www-ap.fnal.gov/MARS/)_, authored and supported at FNAL in the Accelerator division
- In wide use for studying beam related backgrounds, shielding studies* *

##  ILC Detector Simulations

- Targeting advanced conceptual designs for the ILC detectors around 2010
- Credible simulation chains are vital for characterizing and optimizing detector designs.
- ILC community using tools for sharing generator level files; sharing conditions information; geometry databases
- Common format (LCIO) enables studies across detector concepts and test beam data.
- FNAL has increased contributions to ILC detector simulations in the past six months.
- Local effort is concentrated on one detector concept:SiD
- Physics benchmarks
- SiD tracking simulation development
- Providing some local community support for org.LCSIM

## SiD Simulation Workflow

**Physics Generators**

- LCIO

***event ***
***reconstruction:***
***Org.LCSIM***

**Analysis**

**Detector Simulation/**
**Representation:**
**SLIC**

- LCIO

- LCIO

- Typical Simulation chain for detector characterization

## SiD Simulation- FNAL Contributions

**Physics Generators**

- LCIO

**event **
**reconstruction:**
**Org.LCSIM**

***Physics***
***Analysis***

**Detector Simulation/**
**Representation:**
**SLIC**

- LCIO

- LCIO

- Optimize design

- G4&Mars

- Pythia

- Track
- reconstruction

- Physics
- Benchmarks

## Infrastructure and Support

- Active Detector Simulation efforts across FNAL Particle Physics Division, Accelerator Division and FNAL Computing Division requires infrastructure and support.
- ILC
- Code distributions for SLIC/org.LCSIM and 4th concept are available
- Contributing to documentation for org.LCSIM
- Geant4
-  Contributions to CMS simulation
- User support of LHC Physics Center
- Some general support at best effort levels
- Pythia
- General support
- Data/MC tuning studies
- FNAL Computing and Storage resources
- Intend to host CALICE test beam set
- FNAL resources available for the local community
- Patriot project provides generator samples for common use for RunII/LHC.
- Access to FNAL computing resources (FermiGrid) through Open Science Grid

## Summary

- FNAL has expertise in all areas of  detector simulation chains from the generator level to analysis
- Contributions to physics, technical areas, and facilities
- We welcome exploring possible areas of collaboration