ID Tracking and Pixel Subsystem

Web pages and Documentations

• Pixel Wiki, Inner Detector main page, LBNL ATLAS page
• Inner Detector general meetings
, Pixel meetings, ID software meetings
• Pixel Publications, Inner Detector TDR

Talks

• The ATLAS Pixel Detector, Kevin Einsweiler at LBL Interdisciplinary Instrumentation Colloquium (5/12/05).

SLAC pixel meetings

Pixel Commissioning

• Opto-link "beginner's guide" wiki, Service Quarter Panel wiki, SR1 Pixel Daily Plan, SR1 setup photos
• Pixel Endcap SR1 comsic tests: SR1 Cosmic Tests, Trigger Layout, Cosmic Analysis in Release 13
• Pixel Calibration Analysis, Connectivity Tests

ID Tracking and Alignment

• ID Tracking Software
• ID alignment page, InDetAlignHowTo wiki page (alignment constants and DB)
• The Singular Value Decomposition procedure used by SLD:
  NIM paper (A510,233), SLD Note, Talk by Dave Jackson

Pixel Software Documentations

Pixel offline software

Simulation and Geometry 

(Based on initial information from Marian Zdrazil)

• Pixel Detector Geometry (Previous main developer: Davide Costanza)
  • PixelGeoModel package, Package doxygen
  • Inner detector containers (include packages for TRT,SCT and services)
  • ATLAS detector description, Geometry dimension/material browser, General GeoModel
  • Run GeoModelDisplay to display current geometry (from CERN lxplus or pdsf.nersc.gov that sits in Oakland, or even better from your own machine). Joe Boudreau (University of Pittsburgh) is working on the GeoModelDisplay, you might find his presentation in Toronto (Aug/05) useful.

• Pixel Digitization Simulation (Original developer David Calvet left ATLAS 5 years ago)
  • There are two packages - SiDigitization and PixelDigitization - for the pixel detector. SiDigitization is more general, used both for SCT and Pixel detectors.
  • General digitization control, Digitization tutorial, Digitization example in workbook
  • The main package can be inspected from the Brookhaven LXR (http://reserve02.usatlas.bnl.gov/lxr/source/atlas)
    
    • atlas/InnerDetector/InDetDigitization/PixelDigitization
    • atlas/InnerDetector/InDetDigitization/SiDigitization
    there are also:
    • atlas/InnerDetector/InDetRawAlgs/PixelDigitization
    • atlas/InnerDetector/InDetRawAlgs/SiDigitization
    and old G3 code in other directories.
  • One of the goals of our improvements is to adapt the Hans Bichsel calculation for ionization fluctuation in silicon (Mod Rev Phys 60, p663) which is essential in the case the active silicon is divided into many thin slices. The argument for this improved ionization simulation is common to the needed simulation for Linear Collider vertex detectors with thin active silicon as explained in this presentation. The need to model ATLAS pixel signals with fine division of contributions from various thin layers at different depths can be best appreciated from the SLAC seminar by Morris Swartz, where he explained the complex signal collection modelling needed for the varying electric field at different depths which also changes with time as radiation dose level increases.   
  • Project status:
    • Mar/21/06: Project outline (Su Dong), Parameterization of Bichsel ionization calculation (Nick Breznay)
• Other simulation related info:
  Main documentation are the presentations in the software sessions of the pixel weeks (can be searched on the CERN agenda server - agenda.cern.ch), source code, documentation at LXR (http://reserve02.usatlas.bnl.gov/lxr/source/atlas) and few ATLAS notes which are not complete and not at all up to date:
  • The Silicon Trackers transient detector description ATL-SOFT-2002-002
  • The Silicon Trackers Event Data Model for the DC0 software, ATL-SOFT-2002-003
  • Electrical Characteristics of Silicon Pixel Sensors ATL-INDET-2001-011
  • Silicon Trackers digitization framework ATL-SOFT-2001-006
  • Simulation of the pixel detector Module Control Circuit ATL-INDET-99-014
  • Test-beam measurement of the detection efficiency of ATLAS Pixel production modules ATL-COM-INDET-2005-013 and ATL-INDET-INT-2005-007

There is nobody responsible for the development of these packages now. Sasha Rozanov is the convener of the ATLAS pixel software group.

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