KOPIO Detector Simulation

1
KOPIO Detector Simulation

• L. Littenberg
• 10 Jan 2005

2
The Challenges

• Issues similar to those of E787/949
• Usual HEP simulation programs inadequate at low
  energy
• Some necessary information not available (e.g.
  low energy hadron-nuclear cross-sections)
• Very low BR makes some desirable simulations
  impractically time-consuming
• Design not finalized (need iteration with
  engineers)

3
Addressing the issues

• Low energy problems
• Test correct
• Be alert for, diagnose, and remedy anomalies
• Missing information
• Make bottom line measurements
• Do custom analysis of E949 data
• Computing time
• Exploit symmetries shortcuts
• Use GEANT FLUKA measurements as input of
  FastMC

4
Systems Simulated

• Everything upstream of the decay tank discussed
  in the AGS/beam talk
• Calorimeter
• Preradiator
• Charged particle vetoes
• Shashlyk-based BV
• Plate geometry photon vetoes
• Beam catcher veto
• Trigger

5
KOPIO Detector
6
Overall GEANT MC

• Slide of its character (e.g. GEANT 3.21 w. GCALOR
  or whatever, maintained in CVS, etc.) and
  capabilities
• Slide of improvements over the program as it
  comes out of the box, e.g.
• Restoration of neutron-nuclear scattering in
  GCALOR
• Fix to K-nuclear interactions
• Slide listing studies done with it (not sure this
  is needed)
• Slide of what remains to be done
• GEANT pix of signal and background events

7
Calorimeter
8
Calorimeter simulation

• Flow chart-type slide showing simulation going
  all the way up to the electronics
• Slide listing beam cosmic ray tests
• Slide showing agreement of resolution, linearity,
  timing, etc. between data simulation
• Slide showing results of inefficiency test
• Slide showing whats left to be done (if anything)

9
Preradiator
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Preradiator simulation

• Slide showing details of current version,
  possible GEANT drawing of section of prerad (if
  available)
• Slide of GEANT4 work
• Slide of NSLS angle measurement setup results
• Slide of simulations matching NSLS data and
  extrapolation to current design
• Slide of any scintillator tests that have been
  matched by simulation (does such work exist?)
• Slide of simulations of prerad calorimeter
• Slide of what is left to be done.

11
Charged Particle Veto
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CPV simulation

• Slide on inefficiency tests
• Should also show Andries extrapolation
• Slide about GEANT matching to this
• Slide on counter tests
• Slide on Nicolos KOPICS program
• Comparison with tests downstairs
• Slide what is left to do.

13
Photon Vetoes
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Photon Veto Simulation

• GEANT pix of some PV
• Tests on shashlyk prototypes?
• Tests on bar prototypes
• Slide of comparison of data and MC?
• Slide(s) of inefficiency results from E949
• Slide(s) of other inefficiency measurements (e.g.
  Japanese measurements)
• Slide(s) of FLUKA or other MC
• Slide of what is still to be done.

15
Beam catcher photon veto
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Catcher Simulation

• GEANT picture of catcher
• Slides of various beam tests of modules
• Slides of bench tests
• Slides of data/MC matching
• Input to FastMC
• Slide of whats left to do

17
Trigger Simulation

• Should we bring this up at all?
• If so, what to use?
• Ancient work for TDR?
• Simulation of now obsolete prototypes?
• Ermanno work, which?
• Georges work?
• ?

18
Conclusion

• Will depend on what I get