Tests of ProtoDUNE beam-line ToF detectors
Karolína Jurá²ková
Supervisor: Jonathan Paley
Final Report
Summer Internship in Fermilab 2016
1 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Content
Overview and simulations of particle separation
Tests and technical troubles
Installing pLAPPDs into muon telescope
Analysis of pulse shape measurements
2 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
ProtoDUNE - Particle Iden�cation
p, π, K, e present in charged-particle beam
Separation: all over the beam momentum range(1-10 GeV/c)
Time of Flight Measurements (ToF) with high timingresolution
Distance between ToF detectors 23 m
Time resolution below 100 ps required
3 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Particle Separation - time resolution 50 ps, uncertainty inmomentum 2 %
TOF [ns]80 85 90 95 100 105 110
0
20
40
60
80
100
310×Pion
Kaon
Proton
l=23 m, time resolution 50 ps, p=1 GeV/c +-2%
TOF [ns]76.6 76.8 77 77.2 77.4 77.6 77.8 78 78.2 78.4
0
2000
4000
6000
8000
10000
12000
14000
16000
18000
20000 Pion
Kaon
Proton
l=23 m, time resolution 50 ps, p=5 GeV/c +-2%
TOF [ns]76.5 76.6 76.7 76.8 76.9 77 77.1 77.2 77.3 77.40
2000
4000
6000
8000
10000 Pion
Kaon
Proton
l=23 m, time resolution 50 ps, p=8 GeV/c +-2%
TOF [ns]76.5 76.6 76.7 76.8 76.9 77 77.1 77.2 77.30
1000
2000
3000
4000
5000
6000
7000
8000
9000Pion
Kaon
Proton
l=23 m, time resolution 50 ps, p=10 GeV/c +-2%
4 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Particle Separation - time resolution 170 ps, uncertainty inmomentum 2 %
TOF [ns]80 85 90 95 100 105 110
0
10000
20000
30000
40000
50000
60000
70000Pion
Kaon
Proton
l=23 m, time resolution 170 ps, p=1 GeV/c +-2%
TOF [ns]76.5 77 77.5 78 78.5
0
1000
2000
3000
4000
5000
6000
7000Pion
Kaon
Proton
l=23 m, time resolution 170 ps, p=5 GeV/c +-2%
TOF [ns]76.4 76.6 76.8 77 77.2 77.4 77.6 77.8
0
1000
2000
3000
4000
5000 Pion
Kaon
Proton
l=23 m, time resolution 170 ps, p=8 GeV/c +-2%
TOF [ns]76.4 76.6 76.8 77 77.2 77.4 77.6
0
500
1000
1500
2000
2500
3000
3500
4000
4500 Pion
Kaon
Proton
l=23 m, time resolution 170 ps, p=10 GeV/c +-2%
5 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Pion and Kaon Separation
p [GeV/c]1 2 3 4 5 6 7 8 9 10
σ#
0
2
4
6
8
10
12
14
16
18
20 20 ps50 ps170 ps200 ps
σ3
ank K for different time resolutionπSeparation of
#σ = ∆TOF√RMS2
1+RMS22
6 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Particle Separation - time resolutuion 50 ps
p [GeV/c]3 4 5 6 7 8 9 10
σ#
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 50 ps,uncertainty in momentum 0 %
p [GeV/c]3 4 5 6 7 8 9 10
σ#
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 50 ps,uncertainty in momentum 2 %
p [GeV/c]3 4 5 6 7 8 9 10
σ#
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 50 ps,uncertainty in momentum 5 %
p [GeV/c]2 3 4 5 6 7 8 9 10
σ#
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 50 ps,uncertainty in momentum 10 %
7 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Particle Separation - time resolutuion 170 ps
p [GeV/c]2 3 4 5 6 7 8 9 10
σ#
0
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 170 ps,uncertainty in momentum 0 %
p [GeV/c]1 2 3 4 5 6 7 8 9 10
σ#
0
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 170 ps,uncertainty in momentum 2 %
p [GeV/c]1 2 3 4 5 6 7 8 9 10
σ#
0
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 170 ps,uncertainty in momentum 5 %
p [GeV/c]1 2 3 4 5 6 7 8 9 10
σ#
0
2
4
6
8
10
12
14
16
18
20 and KπK and p
and pπσ3
time resolution 170 ps,uncertainty in momentum 10 %
8 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
pLAPPD - prototype Large Area Picosecond PhotoDetector
9 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Testing pLAPPDs from Argonne Lab:troubles and malfunctions
2 pLAPPDs 6 × 6 cm2 mounted on readout boards
�board #52 and board #53�
Testing pLAPPD in the LArIAT beamline in the Fermilab Test
Beam Facility (FTBF)
the test started just few days before the planned summer
accelerator shutdown
the board #53 was missing resistor and capacitor → /
10 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Testing pLAPPDs from Argonne Lab:troubles and malfunctions
Testing �good board� #52 with digitaloscilloscope → ,
read out single photoelectron (SPE) noisepulse shapes from each channel and withdi�erent cable lengths
Board #52 began misbehaving in the end of themeasurements → /Both boards sent to Argonne for repairing andchecking
Board #53 repaired, board #52 supposed to bealright after replacing resistor...
11 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Testing pLAPPDs from Argonne Lab:troubles and malfunctions
Problems with HV supply → /
board #53 brokensparks in board #52 when HV is above 2 kVunable to �nish test with oscilloscope
Preparing installation into muon telescope → ,The installation was delayed because of troubleswith both boards → /
12 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Installing pLAPPDs into muon telescope
Determine pLAPPD e�ciency vs. position
Determine pLAPPD position resolution
13 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Installing pLAPPDs into muon telescope
Mounting VME crate with CAEN V1751 digitizer
Mounting NIM crate with power supply
14 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Making cables for redout from muon telescope
RG-174U signal cables with SMA and MCX connectors
15 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Back to the pulse shape analysis
time [ns]2− 1− 0 1 2 3 4 5
U [m
V]
60−
50−
40−
30−
20−
10−
0
Pulses: threshold 15 mV, Channel L6
16 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Distribution of pulse centroid tmax (threshold 15 mV)
Pulse amplitudes depends on where the SPE from spontanious
thermal emission is emitted
Location of pulse maximum depends on the amplitude
Based of the distribution of tmax the resolution is about 170 ps
In real meausurements we can correct for the e�ect of
amplitude → the resolution would be improved
hEntries 62Mean 0.6459RMS 0.1678
tmax [ns]0.3 0.4 0.5 0.6 0.7 0.8 0.9 10
1
2
3
4
5
6
7
8
hEntries 62Mean 0.6459RMS 0.1678
tmax
A [mV]20 30 40 50 60
[ns]
max
t
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
vs. amplitude in channel L7, threshold 15 mVmaxt
17 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Rise time and slope of leading edge
A [mv]15 20 25 30 35 40 45 50 55 60
slop
e of
lead
ing
edge
dU
/dt
[ns]
10
20
30
40
50
60
Slope vs. Amplitude in Channel L6Slope vs. Amplitude in Channel L6
A [mv]15 20 25 30 35 40 45 50 55
rise
time
[ns]
0.7
0.8
0.9
1
1.1
1.2
1.3
1.4
Rise time vs. Amplitude in Channel L6Rise time vs. Amplitude in Channel L6
A [mv]20 30 40 50 60 70
slop
e of
lead
ing
edge
dU
/dt
[ns]
10
20
30
40
50
60
Slope vs. Amplitude in Channel R6Slope vs. Amplitude in Channel R6
A [mv]20 30 40 50 60 70
rise
time
[ns]
0.9
1
1.1
1.2
1.3
1.4
Rise time vs. Amplitude in Channel R6Rise time vs. Amplitude in Channel R6
18 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
Amplitudes for di�erent cable lengths (threshold 5 mV)
histogramEntries 31Mean 8.485RMS 2.417
Amplitude [mV]5 6 7 8 9 10 11 12 13 14
0
0.5
1
1.5
2
2.5
3
3.5
4
histogramEntries 31Mean 8.485RMS 2.417
Amplitudes, 2.2 feethistogram
Entries 31Mean 8.37RMS 2.363
Amplitude [mV]5 6 7 8 9 10 11 12 13 14
0
0.5
1
1.5
2
2.5
3
3.5
4
histogramEntries 31Mean 8.37RMS 2.363
Amplitudes, 25 feet
histogramEntries 31Mean 6.87RMS 1.645
Amplitude [mV]4 5 6 7 8 9 10 11 12
0
1
2
3
4
5
6
histogramEntries 31Mean 6.87RMS 1.645
Amplitudes, 50 feet
19 / 20 Karolína Jurá²ková Tests of ProtoDUNE beam-line ToF detectors
The End
Thank you for attention!
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