new chod prototype tests at cern
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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
3
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