New CHOD prototype tests at CERN V. Duk, I. Mannelli + help from Claudio Cerri, Riccardo Fantechi, Luigi Di Lella 1 28.08.2013 V.Duk, I.Mannelli
Jan 20, 2016
New CHOD prototype tests
at CERN
V. Duk, I. Mannelli + help from
Claudio Cerri, Riccardo Fantechi, Luigi Di Lella
128.08.2013 V.Duk, I.Mannelli
2
plan
28.08.2013 V.Duk, I.Mannelli
1.Current status of the New
CHOD
2.Setup for tests at CERN
3.First results with Standard Tile
4.Conclusions
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Current status of the New CHOD
28.08.2013 V.Duk, I.Mannelli
Design from Italo:1 plane148 slabs 265x107x30 (Standard Tile)Fiber readout, 18 fibers per slabPM or SiPM readoutSiPM: 2 readout channels per slab in coincidence
See Italo’s talk at MUV/CHOD WG, 05.06.2013
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Tests of the new CHOD
28.08.2013 V.Duk, I.Mannelli
Protvino:EJ200 100x100x20, 200x100x20, 300x100x20Bicron 150x150x20Fiber&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, 390x100x15Fibers with d=1.2 mmPM readout (Hamamatsu R6095)Talk at MUV/CHOD WG 10.04.2013
Standard Tile: 265x107x30
Naples:Mainz setup Double SiPM readout (Hamamatsu 6x6 mm)
CERN:Standard Tile Double SiPM readout (Hamamatsu 3x3 mm)Talk at Weekly meeting 18.07.2013
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Setup at CERN
28.08.2013 V.Duk, I.Mannelli
Scintillator(made in Protvino):265x107x30
Fibers:BCF-92, d=1.0 mm18 fibers glued (9 from one side, 9 from the other)
Readout: 2 SiPM Hamamatsu S10931-050P 3x3 mm2
Preamplifier from Frascati
2 trigger counters:80x40x10 (top), 40x40x5 (bottom)PMT readout~500-600 ps time resolution per counter
Data acquisition:Lecroy Wafesurfer 44xs (2.5 GS/s)
Main goal: to test Standard Tile
scintillator
PM(top)
PM(bottom)
2nd Standard Tile from Ferdi in preparation
Fiber arrangement
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Data & analysis
28.08.2013 V.Duk, I.Mannelli
Data sample:22.08.2013, 3369 triggers
Trigger: PM(top) & PM(bottom)Offline threshold for time measurements: 50mV
“software CFD” correction:Calculate maximum UmaxTake time at 0.2*Umax
Data recording: Lecroy Wavesurfer 44xs, 4 channels with an external triggerCH1: PM(top)CH2: PM(bottom)CH3: SiPM(right)CH4: SiPM(left)
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Signals from PMs
28.08.2013 V.Duk, I.Mannelli
Small amplitudes: inclined muons
Large amplitudes (peak at 300-400mV): MIP
Amp, V Amp, V
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Signals from SiPMs
28.08.2013 V.Duk, I.Mannelli
1 p.e. ~ 20 mV<A> ~ 600 mV
Good light yield:> 30 p.e.
Amp, V Amp, V
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Amplitude correlations
28.08.2013 V.Duk, I.Mannelli
PM:amplitude configuration can be small-small, big-small, big-big (good particle)Large amplitudes correspond to slewing corrections
SiPM:Good correlation
Transparent scintillator
Amp, V
Amp, V Amp, V
Amp, V
Amp, V
Amp, V
Amp, V
dt, ns
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Time resolutions
28.08.2013 V.Duk, I.Mannelli
Time resolutions from solving system of equations:SiPM left: ~0.56 nsSiPM right: ~0.48 nsTrigger: ~0.78 ns
SiPM time: software CFD correction
PM time: no time correction
T(SiPM left) –T(trg)
σ ~ 0.96 ns
T(SiPM right)–T(trg)
dT(SiPM)T(SiPM,mean) – T(trg)
σ ~ 0.84 ns
σ ~ 0.74 ns
σ ~ 0.92 ns
dt, ns dt, ns
dt, ns dt, ns
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High PM amplitudes
28.08.2013 V.Duk, I.Mannelli
Time resolutions from solving system of equations:SiPM left: ~0.54 nsSiPM right: ~0.49 nsTrigger: ~0.66 ns
T(SiPM left) –T(trg) T(SiPM right)–T(trg)
dT(SiPM)T(SiPM,mean) – T(trg)
σ ~ 0.85 ns
σ ~ 0.72 ns
σ ~ 0.73 ns
σ ~ 0.82 ns
dt, ns dt, ns
dt, ns dt, ns
SiPM time: software CFD correction
PM time: no time correction
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conclusions
28.08.2013 V.Duk, I.Mannelli
Standard Tile is prepared
Setup is working
Time resolution ~0.5ns obtained (after corrections)
Np.e.>30
THANK YOU!!!
1328.08.2013 V.Duk, I.Mannelli
spares
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PM time resolution
28.08.2013 V.Duk, I.Mannelli
dt, ns dt, ns
dt, ns dt, ns
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Risetime (Tmax – T0.2max)
28.08.2013 V.Duk, I.Mannelli
dt, ns dt, ns
dt, ns dt, ns
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Temperature effects
28.08.2013 V.Duk, I.Mannelli
Change in T
Change in V(breakdown)
Change in risetime/amplit
ude
Change in HV-V(breakdown)
Change in gain
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Selected events
28.08.2013 V.Duk, I.Mannelli