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T1008 status

Develops a SuperB Instrumented Flux Return system with muon identification capabilities below 5GeV. The system includes a superconducting solenoid, plastic scintillator bars with WLS fibers, and SiPMs for readout. A BaBar-like detector layout is tested on a prototype beam with a focus on muon and KL detection. The system features active layers with endcap and barrel configurations. Data collection includes Cherenkov scans and selection processes for muons and pions. Plan for clean sample collection and understanding Cherenkov efficiency at different momenta.

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T1008 status

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  1. T1008 status W.Baldini for the SuperB-IFR Group

  2. R&D for the SuperB Instrumented Flux Return • Muon Identification E< 5GeV • Superconducting solenoid Flux Return Instrumented with active material • Plastic scintillator bars readout through WLS fibers and Silicon Photo-Multipliers (SiPM) • Baseline layout to be tested on beam with a prototype • TDR to be written in spring…

  3. The IFR Baseline Detection Technique • Magnet Flux Return instrumented to detect Muons and KL • BaBar-like detector with hexagonal barrel and two encaps • Plan to re-use BaBar IFR structure, adding iron to improve μ-ID • Scintillator as active material to cope with higher flux of particles • Minos-like scintillator bars readout through WLS fibers and Silicon Photo-Multipliers • 8-9 active • layers Endcap Barrel μ

  4. The Prototype Iron Active Layers (Pizza Boxes) Prototype • Iron: 60x60x92 cm3, 9 slots for the active layers • up to 9 active layers readout together • 4 Time Readout (TDC-RO) “standard “ • 4 Binary Readout (BiRo) “standard” • 4 special modules to study different • fibers or SiPM geometry Active Layer (“pizza box”)

  5. Summary of activities • Installation: March 1-4 • Security walkthrough: March 5, first beam: March 3 • Trigger timing and apparatus setting up • Data taking summary: • 8,6,5 GeV • Cherenkov scan • Muons: • Selected with Cherenkov (C1) • Selected with downstream scintillators (S3 and S4) • Pions • Selected with Cherenkov (C1) • Control triggers • No Cherenkov • Only Electrons (C2) veto • Still 16 hours of beam (until 6 am)

  6. Cherenkov scans • For us is of fundamental importance to collect clean samples of muons and pions • very important to understand how well the cherenkov tags the particles • scan needed for each beam momentum: 8,6,5 GeV/c

  7. Cherenkov pressure scan: 8 GeV (N2) July-11 scan Pion peak Muon peak March-12 scan

  8. Cherenkov pressure scan: 6 GeV (N2) July-11 scan March-12 scan

  9. Cherenkov pressure scan: 5GeV March-12 scan

  10. Event samples… Hit channel time (samples of of 12.5 nsec) Detector hit map for a sample of Muons at 8 GeV

  11. Event samples… Hit channel time (samples of of 12.5 nsec) Detector hit map for a sample of Pions at 8 GeV

  12. Summarizing….. • We have taken data at 8,6,5, GeV • Now the Cherenkov seems to be more efficient at 6 and 5 GeV than in October (something happened in the meanwhile?) • 24h running since Friday • Apart from a few interruption at the beginning (March 6-th) the beam was very stable • We plan to take data until tomorrow morning (8am?) then move the equipment out of the area

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