Dan Holmes

1
Reconstruction Of the 2002 M0 Test Beam Using
GEANT4/OSCAR Dan Holmes, Bristol. (
)
2
Overview
IN
(Martin Liendl)
OUT
3
Beam Width/Displacement

• I am shooting a square, parallel beam.
• ..user defines beam width
• Beam can be displaced in plane perpendicular to
  direction of beam. (for scans)
• user defines displacement
• all other usual G4 adjustments can be made
  particle/energy/direction etc..

Beam width
Beam position
Beam
4
So far

• At the moment only read out info from module 2
  and 100 xtals read out by m0
• easily updated to include more modules (future
  test beams)
• easy to update to new iterations of DDD
  descriptions
• written to OSCAR CVS
• under Examples/ECalTestBeam02
• look at the files in /doc for info on how to run
  it

5
So far

• Validation work with Sasha Nikitenko underway.
• position scan of 1 xtal with 20mm2 trig
  ..120GeV e-..

G4
..will this be similar to what Pietro, Sasha
co..have??
..looks promising so far but another few days
until I have run enough jobs to get a good
fit.. ..then some smearing etc..
6
To Do List

• short term
• G4 validation
• make sure I get some sensible looking results
• vs test beam data/other G4 data (Sasha N)
• vs G3 data (Alain G)

• Long(er) term
• Migrate code to work under OSCAR2
• Write out some persistent objects to be read by
  ORCA ??!

7
Something Pretty
1 GeV e- shot at module 0
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