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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)

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Ongoing activities

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  1. 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.)

  2. 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.)

  3. 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!)

  4. KLOE prototype support (LNF) beam Stefano Cerioni/Bruno Dulach, LNF

  5. 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

  6. 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

  7. 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?

  8. Possible setup with g prototype veto

  9. 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

  10. New prototype 240 mm 22896 × 1.63 m fibers  38 km 660 mm 810 mm 100 mm PMT light-guide

  11. 1 mm round scintillating fibers 1€ = 1.21 $ = 135 ¥

  12. 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

  13. 1 mm WLS fibers 1€ = 1.21 $ = 135 ¥

  14. 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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