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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)

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ongoing activities
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)
  • Geant4 simulation general issues
    • validation of MC with NIST data (total g absorption probability) (Marco, Emanuele)
  • Geant4 simulation of testbeam
    • KLOE prototype (Emanuele)
    • scintillator, fiber hodoscope (Marco)
    • crystal & lead-glass monitor calorimeter (Andreas)
    • photon source (Tommaso, P.)
ongoing activities1
Ongoing activities
  • Next testbeam preparation
    • gamma source (P., BTF staff, AGILE Trieste)
    • mechanical support for prototype (Frascati: B. Dulach, S. Cerioni)
    • KLOE prototype: Light-guide polishing (Frascati workshop)
    • KLOE prototype: PMT gluing (Frascati: L. Iannotti)
  • New prototype
    • layout (P.)
    • procurement (P.)
    • lead grooving machines status (Antonella, P.)
plans for prototype s testing
Plans for prototype(s) testing
  • Tiles prototipes:
  • CKM, from FNAL (Peter Cooper)
  • CKM, from Protvino (Vladimir Obraztsov)
  • Spaghetti prototipe(s):
  • KLOE, barrel prototype piece
  • new half-C prototype (to be built!)
kloe prototype support lnf
KLOE prototype support (LNF)

beam

Stefano Cerioni/Bruno Dulach, LNF

what to test
What to test
  • Tag electrons/photons hitting the prototype
  • Select events with one and only one particle
  • Inefficiency = tagged events E>Ethreshold/tagged events

vs.

    • threshold
    • beam energy
    • impact position (distance from border)
    • impact angle
  • Robust estimate probability of mis-tag
setup in july test
Setup in July test

prototype

scintillator fingers

fiber hodoscope (3 mm pitch)

electrons

  • Improvements:
  • Use silicon chambers (tagged g beam target) as electron tracker
  • Spatial resolution  240 mm
tests with photons
Tests with photons
  • Mis-tag probability to be estimated
  • Photon source characteristics never measured:
    • efficiency of photon source
    • energy resolution
    • beam spot size and position
    • stability
  • Use different detectors to characterize g beam
  • Benchmark for efficiency estimate
    • use energy tag?
    • collimators?
    • veto lost photons?
status of g beam
Status of g beam
  • 3 – 9 October
    • installation and commissiong of Silicon tagger modules (12 stations)
  • 10 October – 31 October
    • AGILE payload calibration
  • 16 – 30 November
    • P326 testbeam
  • December
    • P326 testbeam
new prototype
New prototype

240 mm

22896 × 1.63 m fibers  38 km

660 mm

810 mm

100 mm

PMT

light-guide

1 mm round scintillating fibers
1 mm round scintillating fibers

1€ = 1.21 $ = 135 ¥

1 mm round scintillating fibers1
1 mm round scintillating fibers

Bicron BCF-10

peak = 432 nm

td = 2.7 ns

l = 2.2 m

Bicron BCF-12

peak = 435 nm

td = 3.3 ns

l = 2.7 m

Optectron SD101A/D

peak = 430 nm

td = 3 ns

l = 2.0/1.5 m

Optectron SD104

peak = 530 nm

td = 3 ns

l = 3.0 m

Kuraray

peak = 437 nm

td=2.4 ns

l>3.5 m

1 mm wls fibers
1 mm WLS fibers

1€ = 1.21 $ = 135 ¥

1 mm wls fibers1
1 mm WLS fibers

Bicron BCF-92

td = 2.8 ns

l = 3.1 m

Optectron F200

315-410  407-455 nm

peak = 427 nm

Optectron F201

299-477  471-511 nm

peak = 493 nm

Kuraray

l = 2 m

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