Ongoing activities. Paw analysis of testbeam data (Tommaso, P.) Root analysis of testbeam data (Mauro) Testbeam Geant4 simulation (Marco, Emanuele) Root persistency (Marco) Geant4 simulation of full LAV: Production & analysis (Marco, Andreas) Change lead/scintillator ratio (Emanuele) - PowerPoint PPT Presentation
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Ongoing activities• Paw analysis of testbeam data (Tommaso, P.)Paw analysis of testbeam data (Tommaso, P.)
• Root analysis of testbeam data (Mauro)Root analysis of testbeam data (Mauro)
• Geant4 simulation of full LAV:Geant4 simulation of full LAV:– Production & analysis (Marco, Andreas)Production & analysis (Marco, Andreas)– Change lead/scintillator ratio (Emanuele)Change lead/scintillator ratio (Emanuele)
• Geant4 simulation general issuesGeant4 simulation general issues– validation of MC with NIST data (total validation of MC with NIST data (total absorption probability) (Marco, absorption probability) (Marco,
– impact position (distance from border)impact position (distance from border)
– impact angleimpact angle
• RobustRobust estimate probability of mis-tag estimate probability of mis-tag
Setup in July test
prototypeprototype
scintillator fingersscintillator fingers
fiber hodoscope (3 mm pitch)fiber hodoscope (3 mm pitch)
electronselectrons
Improvements:Improvements:• Use silicon chambers (tagged Use silicon chambers (tagged beam target) as electron tracker beam target) as electron tracker• Spatial resolution Spatial resolution 240 240 mm
Tests with photons• Mis-tag probability to be estimatedMis-tag probability to be estimated
• Photon source characteristics never measured:Photon source characteristics never measured:
– efficiency of photon sourceefficiency of photon source
– energy resolutionenergy resolution
– beam spot size and positionbeam spot size and position
– stabilitystability
• Use different detectors to characterize Use different detectors to characterize beam beam
• Benchmark for efficiency estimateBenchmark for efficiency estimate
– use energy tag?use energy tag?
– collimators?collimators?
– veto lost photons? veto lost photons?
Possible setup with
prototypeprototype
vetoveto
Status of beam
• 3 – 9 October3 – 9 October
– installation and commissiong of Silicon tagger modules (12 installation and commissiong of Silicon tagger modules (12 stations)stations)