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New CHOD prototype tests at CERN

New CHOD prototype tests at CERN. V. Duk, I. Mannelli + help from Claudio Cerri, Riccardo Fantechi, Luigi Di Lella. 1. plan. Current status of the New CHOD Setup for tests at CERN First results with Standard Tile Conclusions. 2. Current status of the New CHOD.

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New CHOD prototype tests at CERN

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  1. V.Duk, I.Mannelli New CHOD prototype tests at CERN V. Duk, I. Mannelli + help from Claudio Cerri, Riccardo Fantechi, Luigi Di Lella 1

  2. plan V.Duk, I.Mannelli • Current status of the New CHOD • Setup for tests at CERN • First results with Standard Tile • Conclusions 2

  3. Current status of the New CHOD V.Duk, I.Mannelli • Design from Italo: • 1 plane • 148 slabs 265x107x30 (Standard Tile) • Fiber readout, 18 fibers per slab • PM or SiPM readout • SiPM: 2 readout channels per slab in coincidence • See Italo’s talk at MUV/CHOD WG, 05.06.2013 3

  4. Tests of the new CHOD V.Duk, I.Mannelli • Protvino: • EJ200 100x100x20, 200x100x20, 300x100x20 • Bicron150x150x20 • Fiber&directSiPM readout (SiPM CPTA-146, PM Hamamatsu 7400U, SenSL) • Direct PM readout (Hamamatsu 7400U) • Talks at weekly meetings (28.02.2013, 23.05.2013) and MUV/CHOD WG (05.06.2013, 28.08.2013) • Mainz: • Protvino scintillator 420x60x10, 390x100x15 • Fibers with d=1.2 mm • PM readout (Hamamatsu R6095) • Talk at MUV/CHOD WG 10.04.2013 • Naples: • Mainz setup • DoubleSiPM readout (Hamamatsu 6x6 mm) Standard Tile: 265x107x30 • CERN: • Standard Tile • DoubleSiPM readout (Hamamatsu 3x3 mm) • Talk at Weekly meeting 18.07.2013 4

  5. Setup at CERN V.Duk, I.Mannelli Fiber arrangement Main goal: to test Standard Tile Scintillator (made in Protvino): 265x107x30 • 2 trigger counters: • 80x40x10 (top), 40x40x5 (bottom) • PMT readout • ~500-600 ps time resolution per counter • Fibers: • BCF-92, d=1.0 mm • 18 fibers glued (9 from one side, 9 from the other) 2nd Standard Tile from Ferdi in preparation PM(top) scintillator PM(bottom) • Readout: • 2 SiPM Hamamatsu S10931-050P 3x3 mm2 • Preamplifier from Frascati • Data acquisition: • LecroyWafesurfer 44xs (2.5 GS/s) 5

  6. Data & analysis V.Duk, I.Mannelli Data sample: 22.08.2013, 3369 triggers • Trigger: • PM(top) & PM(bottom) • Offline threshold for time measurements: 50mV Data recording: Lecroy Wavesurfer 44xs, 4 channels with an external trigger CH1: PM(top) CH2: PM(bottom) CH3: SiPM(right) CH4: SiPM(left) • “software CFD” correction: • Calculate maximum Umax • Take time at 0.2*Umax 6

  7. Signals from PMs V.Duk, I.Mannelli Small amplitudes: inclined muons Large amplitudes (peak at 300-400mV): MIP Amp, V Amp, V 7

  8. Signals from SiPMs V.Duk, I.Mannelli 1 p.e. ~ 20 mV <A> ~ 600 mV Good light yield: > 30 p.e. Amp, V Amp, V 8

  9. Amplitude correlations V.Duk, I.Mannelli • PM: • amplitude configuration can be small-small, big-small, big-big (good particle) • Large amplitudes correspond to slewing corrections Amp, V Amp, V dt, ns Amp, V Amp, V Amp, V SiPM: Good correlation Transparent scintillator Amp, V Amp, V 9

  10. Time resolutions V.Duk, I.Mannelli T(SiPM left) –T(trg) T(SiPM right)–T(trg) σ ~ 0.96 ns σ ~ 0.92 ns dt, ns dt, ns T(SiPM,mean) – T(trg) dT(SiPM) σ ~ 0.74 ns σ ~ 0.84 ns dt, ns dt, ns SiPM time: software CFD correction PM time: no time correction Time resolutions from solving system of equations: SiPM left:~0.56 ns SiPM right:~0.48 ns Trigger: ~0.78 ns 10

  11. High PM amplitudes V.Duk, I.Mannelli T(SiPM left) –T(trg) T(SiPM right)–T(trg) σ ~ 0.85 ns σ ~ 0.82 ns dt, ns dt, ns T(SiPM,mean) – T(trg) dT(SiPM) σ ~ 0.72 ns σ ~ 0.73 ns dt, ns dt, ns SiPM time: software CFD correction PM time: no time correction Time resolutions from solving system of equations: SiPM left:~0.54 ns SiPM right:~0.49 ns Trigger: ~0.66 ns 11

  12. conclusions V.Duk, I.Mannelli • Standard Tile is prepared • Setup is working • Time resolution ~0.5ns obtained (after corrections) • Np.e.>30 THANK YOU!!! 12

  13. V.Duk, I.Mannelli spares 13

  14. PM time resolution V.Duk, I.Mannelli dt, ns dt, ns dt, ns dt, ns 14

  15. Risetime (Tmax – T0.2max) V.Duk, I.Mannelli dt, ns dt, ns dt, ns dt, ns 15

  16. Temperature effects V.Duk, I.Mannelli Change in T Change in V(breakdown) Change in HV-V(breakdown) Change in gain Change in risetime/amplitude 16

  17. Selected events V.Duk, I.Mannelli 17

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