target waveform sampler for sipm using target timing - mc …€¦ · using target for single...
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![Page 1: TARGET Waveform sampler for SiPM Using TARGET timing - MC …€¦ · Using TARGET for single photon detection and precise timing: Test fast preamplifier (μPC2710TB) with different](https://reader033.vdocuments.net/reader033/viewer/2022042401/5f1040f37e708231d44832e5/html5/thumbnails/1.jpg)
● Using TARGET for single photon detection and precise timing:
● Test fast preamplifier (μPC2710TB) with different inductors (0.047 μH, 1 μH & 22μH)
● Compare different Hamamatsu SiPM's:
– 3x3 mm; 100 μm pitch; model S10931-100P(X); Serial # 19; Vop
= 69.82 V
– 1x1 mm; 25 μm pitch; model S10362-11-025C; Serial # 34; Vop
= 71.67 V
– 1x1 mm; 100 μm pitch; model S10362-11-100U; Serial # 147; Vop
= 70.52 V
● Compare different operating Voltages● Compare different light intensities (Filters → 6.25%; 12.5%; 50%)
● Setup:
● Laser, filters, diffuser → small # of photons hit SiPM
● Attenuator + Ortec fast amplifier for the 3x3 mm SiPM
+
TARGET Waveform sampler for SiPM
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Basic Waveform Analysis
1) Baseline compensation
2) Look for peaks, I use ROOT TSpectrum
3) Only select peaks in a certain time window
4) @ this moment I only allow 1 peak for further analysis
5) Use a simplified CFD for time determination:
a) Get peak height
b) 30% of peak height = threshold
c) Lin fit around crossing of threshold determines the time of detection
6) Histogram peak heights and time
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TARGET Waveform Analysis of SiPM signals
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SiPM Optical pictures
Hamamatsu 3x3 mm2:● 100 micron pitch● ~ 84 micron cell size
Hamamatsu 1x1 mm2:● 25 micron pitch● ~ 13 micron cell size
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Optical pictures
Hamamatsu 1x1 mm2:● 100 micron pitch● ~ 88 micron cell size
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STM SiPM PROTOTYPES: Mod A
● Die Size: 4.37mmx4.37mm● Array Size: 3.5mmx3.5mm● # of cells: 70x70● Pitch 50 micron● Fill factor: 36% (~30% from pic)
● Some dirt on top, handling after production, cleaning → removal
![Page 7: TARGET Waveform sampler for SiPM Using TARGET timing - MC …€¦ · Using TARGET for single photon detection and precise timing: Test fast preamplifier (μPC2710TB) with different](https://reader033.vdocuments.net/reader033/viewer/2022042401/5f1040f37e708231d44832e5/html5/thumbnails/7.jpg)
New STM SiPM PROTOTYPES: Mod C
● Die Size: 4.37mmx4.37mm● Array Size: 3.5mmx3.5mm● # of cells: 60x60● Pitch 58 micron● Fill factor: 45% (~37% from pic)
● Some dirt on top, handling after production, cleaning → removal
![Page 8: TARGET Waveform sampler for SiPM Using TARGET timing - MC …€¦ · Using TARGET for single photon detection and precise timing: Test fast preamplifier (μPC2710TB) with different](https://reader033.vdocuments.net/reader033/viewer/2022042401/5f1040f37e708231d44832e5/html5/thumbnails/8.jpg)
New STM SiPM PROTOTYPES: Mod C
● Die Size: 4.37mmx4.37mm● Array Size: 3.5mmx3.5mm● # of cells: 60x60● Pitch 58 micron● Fill factor: 45% (~37% from pic)
● Some dirt on top, handling after production, cleaning → removal
![Page 9: TARGET Waveform sampler for SiPM Using TARGET timing - MC …€¦ · Using TARGET for single photon detection and precise timing: Test fast preamplifier (μPC2710TB) with different](https://reader033.vdocuments.net/reader033/viewer/2022042401/5f1040f37e708231d44832e5/html5/thumbnails/9.jpg)
SiPM Characteristics measured
Single SiPM:• Gain vs ( V
op ; T )
• Linearity ( laser & rad. sources )• Timing resolution ( V
op ; T ; threshold )
2 SiPM PET:• Energy resolution vs ( V
op ; T )
• Back to back Timing resolution vs ( Vop
; T ; threshold )
SiPM: Single and PET Setups
![Page 10: TARGET Waveform sampler for SiPM Using TARGET timing - MC …€¦ · Using TARGET for single photon detection and precise timing: Test fast preamplifier (μPC2710TB) with different](https://reader033.vdocuments.net/reader033/viewer/2022042401/5f1040f37e708231d44832e5/html5/thumbnails/10.jpg)
Energy resolution: #2 & #6
• Only minor improvement by lowering the temperature (related to improvement of gain by lowering temperature?)
• Energy resolution improves with increase of V
• STM #6 has a higher gain than #2
30.5 31 31.5 32 32.5 33 33.5
13.9
14.4
14.9
15.4
15.9
16.4
16.9
17.4
17.9
18.4
STM #2
Energy resolution for different temperatures
-15 #2-10 #2-5 #20 #25 #210 #215 #2
V bias [V]
En
erg
y re
so
lutio
n [%
FW
HM
]
30.5 31 31.5 32 32.5 33 33.5
13
13.5
14
14.5
15
15.5
16
16.5
17
17.5
STM #6
Energy resolution for different temperatures
-15 #6-10 #6-5 #60 #65 #610 #615 #6
V bias [V]
En
erg
y re
so
lutio
n [%
FW
HM
]
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BtB timing resolution: #2 & #6
30.5 31 31.5 32 32.5 33 33.5
300
320
340
360
380
400
420
440
460
480
500
520
BtB Timing
Timing resolution for different temperatures
-15-10-5051015
V bias [V]
Tim
ing
re
so
lutio
n (
sig
ma
) [p
s]
29.5 30 30.5 31 31.5 32 32.5 33 33.5
300
305
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BtB Timing Resolution vs threshold
equal gain, same threshold
100mV125mV
Vbias[V]
Tim
ing
Re
so
lutio
n [p
s]
• Threshold ~ 150mV• At higher V
bias noise triggers too much
and degrades time res.
● Threshold ~ 300mV
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Linearity• Setup:
• Laser pulses (635nm)• # of photons controlled with neutral density filters
(going from 1 photon to ~ 20000 photons / pulse)• Uniform light distribution over surface
Fitfunction → y = p0*(1-exp(x/p1))
Line → y = 0.109*x - 0.118
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0
100
200
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400
500
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700
800
900
STM SiPM 3neg. Vbias vs signal
1 p.e.2 p.e.3 p.e.
Vbias [V]
Pu
lse
he
igh
t [m
V]
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0
50
100
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450
Pulse Height Differences
Difference [2-1]Difference [3-2]Difference [3-1]
Vbias [V]
Diff
ere
nce
[mV
]
Signal saturates with increasing V_bias
Low light intensity
Differences in signal between single, double and triple photo-electrons behaves linear
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0.5 1 1.5 2 2.5 3 3.5
10000
100000
1000000
10000000
Dark rate vs. Threshold
Photon level [a.b.u.]
Da
rk r
ate
[MH
z]
• Gain is ~ 1.67e5 Gain = average of gain calculated from 1 p.e. and 2 p.e.
• ADC has 25fC/count
• Amplification factor is 450
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Position Scans
Setup:• Pulsed laser (635 nm)• Single Photon light intensity• Sigma laser focal point ~ 4-5 μm• 1 μm stepsize (XYZ stages)
Geometrical factor:• Color picture → Black & White:
• Value above 50% of max value → count pixel as within active area (Black area)
• Value below 50% max value → pixel is outside active area (White Area)
• Geometrical factor result from total scan area is ~32.9 %• Geometrical factor result from red square area is ~33.0 %
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new STMicroelectronics SiPM Model A
new STMicroelectronics SiPM Model C
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2D scans:● Mod C 1micron step →● Mod A 2x2.5 Micron step at different
locations →behaviour is fairly uniform
Gain STMicroelectronics SiPM for T = 15C → -20C
new STMicroelectronics SiPM