Claudio Cerri, Riccardo Fantechi, Luigi Di Lella New CHOD prototype tests at CERN V. Duk, I. Mannelli + help from Claudio Cerri, Riccardo Fantechi, Luigi Di Lella 28.08.2013 V.Duk, I.Mannelli 1 1
Current status of the New CHOD Setup for tests at CERN plan Current status of the New CHOD Setup for tests at CERN First results with Standard Tile Conclusions 28.08.2013 V.Duk, I.Mannelli 2 2
Current status of the New CHOD 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 28.08.2013 V.Duk, I.Mannelli 3 3
Tests of the new CHOD Standard Tile: 265x107x30 Protvino: EJ200 100x100x20, 200x100x20, 300x100x20 Bicron 150x150x20 Fiber&direct SiPM 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 Double SiPM readout (Hamamatsu 6x6 mm) Standard Tile: 265x107x30 CERN: Standard Tile Double SiPM readout (Hamamatsu 3x3 mm) Talk at Weekly meeting 18.07.2013 28.08.2013 V.Duk, I.Mannelli 4 4
Setup at CERN Main goal: Scintillator to test Standard Tile 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 Readout: 2 SiPM Hamamatsu S10931-050P 3x3 mm2 Preamplifier from Frascati PM(bottom) Data acquisition: Lecroy Wafesurfer 44xs (2.5 GS/s) 28.08.2013 V.Duk, I.Mannelli 5 5
Data & analysis 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 28.08.2013 V.Duk, I.Mannelli 6 6
Signals from PMs Small amplitudes: inclined muons Large amplitudes (peak at 300-400mV): MIP Amp, V Amp, V 28.08.2013 V.Duk, I.Mannelli 7 7
Signals from SiPMs Good light yield: > 30 p.e. 1 p.e. ~ 20 mV <A> ~ 600 mV Good light yield: > 30 p.e. Amp, V Amp, V 28.08.2013 V.Duk, I.Mannelli 8 8
Amplitude correlations PM: amplitude configuration can be small-small, big-small, big-big (good particle) Large amplitudes correspond to slewing corrections Amp, V Amp, V Amp, V dt, ns Amp, V Amp, V SiPM: Good correlation Transparent scintillator Amp, V Amp, V 28.08.2013 V.Duk, I.Mannelli 9 9
Time resolutions σ ~ 0.96 ns σ ~ 0.92 ns σ ~ 0.74 ns σ ~ 0.84 ns 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 28.08.2013 V.Duk, I.Mannelli 10 10
High PM amplitudes σ ~ 0.85 ns σ ~ 0.82 ns σ ~ 0.72 ns σ ~ 0.73 ns 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 28.08.2013 V.Duk, I.Mannelli 11 11
THANK YOU!!! conclusions Standard Tile is prepared Setup is working Time resolution ~0.5ns obtained (after corrections) Np.e.>30 THANK YOU!!! 28.08.2013 V.Duk, I.Mannelli 12 12
spares 28.08.2013 V.Duk, I.Mannelli 13 13
PM time resolution dt, ns dt, ns dt, ns dt, ns 14 28.08.2013 V.Duk, I.Mannelli 14 14
Risetime (Tmax – T0.2max) dt, ns dt, ns dt, ns dt, ns 15 28.08.2013 V.Duk, I.Mannelli 15 15
Change in risetime/amplitude Temperature effects Change in T Change in V(breakdown) Change in HV-V(breakdown) Change in gain Change in risetime/amplitude 28.08.2013 V.Duk, I.Mannelli 16 16
Selected events 28.08.2013 V.Duk, I.Mannelli 17 17