Ongoing activities
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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

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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?


Possible setup with g

Possible setup with g

prototype

veto


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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