1. SiPM+NINO as a detection system for CEDAR
François POWOLNY
Pierre JARRON
Julie GUIZIEN

2. CEDAR project Cerenkov light detection λ = 300 – 400 nm
freq = 2 MHz / mm2
SiPM 1x1 mm2 from :
FBK (INFN)
Hamamatsu
ST Microelectronics
CEDAR
F. POWOLNY 29 / 07 / 2009

3. SiPM principle SiPM signal is a pile up of SPAD signals
Binary detector
For synchronous photons:
SPAD
i(t)
90mA
60mA
30mA t
CEDAR
F. POWOLNY 29 / 07 / 2009

4. Experimental setup Keithley 2410 33V i+ (t) SiPM i- (t) + -
50 Ω
Keithley 2410
33V
50 Ω
Laser Pulse :
50 ps
1 to 5 photons
Delay + Pulse Height
10 nF
50 Ω
i+ (t)
SiPM +
FILTER
FILTER -
20 Ω
i- (t)
50 Ω
CEDAR
F. POWOLNY 29 / 07 / 2009

5. Reverse I(V) Current (A) VBD = 33.5 V  Vbias = 36.5 V Voltage (V)
Hamamatsu
FBK
STM
VBD
69 V
33.5 V
30 V
Current (A)
VBD = 33.5 V
 Vbias = 36.5 V
Voltage (V)
CEDAR
F. POWOLNY 29 / 07 / 2009

6. Forward I(V) RQ/Ncell = dV/dI = 11.06 kΩ Ncell = 576 RQ = 6.3 MΩ
Current (A)
Ham.
FBK
STM
Ncell
100
576
400
RQ W
1.3 M
6.3 M
1.6 M
Forward bias (V)
CEDAR
F. POWOLNY 29 / 07 / 2009

7. Signal shape FBK Fast Component: 1.5 ns Slow Component: 54 ns
Ham.
FBK
STM
fast
2.5 ns
1.5 ns
slow
100 ns
54 ns
recharging -
500 ns
CEDAR
F. POWOLNY 29 / 07 / 2009

8. Signal pulse height HAMAMATSU FBK STM Pulse height [mA] No. of Counts
1 Phot
FBK
No. of Counts
1 Phot
STM
1 Phot
CEDAR
F. POWOLNY 29 / 07 / 2009

9. Time resolution measurement
SiPM alone

10. Setup schematic Laser Pulse : 50 ps 1 to 5 photons CEDAR
SiPM
delay
Pulse
height
CEDAR
F. POWOLNY 29 / 07 / 2009

11. Scatter plot Delay(ns) Pulse height (mV) Hamamatsu
Events corelated to the laser
Delay(ns)
noise
Pulse height (mV)
No. of Counts
Timing measurements
Hamamatsu
1 x 1
Vbias = 69.5V – (VBD = 69V)
No. of Counts
1 photon detected region
CEDAR
F. POWOLNY 29 / 07 / 2009

12. Zoom on the most populated area
Hamamatsu
Delay(ns)
Pulse height (mV)
No. of Counts
Selection of the events
corresponding to the
detection of 1 photon…
Timing measurements
Hamamatsu
1 x 1
Vbias = 69.5V – (VBD = 69V)
No. of Counts
CEDAR
F. POWOLNY 29 / 07 / 2009

13. Time resolution No. of Counts Delay(ns) Hamamatsu
f(x) = a1*exp(-((x-b1)/c1)^2)
a1 = 505.8
b1 =
c1 =0.3772
… and fit of the
corresponding
delay distribution
No. of Counts
σ = 267 ps
Timing measurements
Hamamatsu
1 x 1
Vbias = 69.5V
VBD = 69V
Delay(ns)
CEDAR
F. POWOLNY 29 / 07 / 2009

14. Time resolution measurement
Input of Nino t
SiPM + NINO
f = 20 MHz
Nino threshold
I (t)
V (t)
Time walk
Time walk a pulse width
Output of Nino t

15. Setup schematic + - Laser Pulse : 50 ps 1 to 5 photons 20 MHz CEDAR
delay
Pulse
width +
FILTER
FILTER -
20 Ω
CEDAR
F. POWOLNY 29 / 07 / 2009

16. SiPM + NINO @ 20 MHz Delay(ns) Pulse Width (ns) Timing measurements
STM
Delay(ns)
Pulse Width (ns)
No. of Counts
Timing measurements
STM 1x1 – VBD = 30.4 V
Vbias = 34 V
NINO TH = 100 mV
Freq: 20 MHz
No. of Counts
CEDAR
F. POWOLNY 29 / 07 / 2009

17. Zoom on the most populated area
1 detected
photon region
Delay(ns)
Pulse Width (ns)
No. of Counts
STM
Timing measurements
ST 1x1 – VBD = 30.4 V
Vbias = 34 V
NINO TH = 100 mV
Freq: 20 MHz
No. of Counts
CEDAR
F. POWOLNY 29 / 07 / 2009

18. Time walk correction
STM
CEDAR
F. POWOLNY 29 / 07 / 2009

19. No. of Counts σ = 172 ps Delay(ns) STM f(x) = a1*exp(-((x-b1)/c1)^2)
CEDAR
F. POWOLNY 29 / 07 / 2009

20. Overview of the results
Time resolution (s) on the detection of a single 405 nm photon
STM
1x1 mm2
FBK
Hamamatsu
SiPM alone
180 ps
300 ps
250 ps
SiPM + NINO
After TWC
@ 1 MHz
450 ps
preliminary
480 ps
@ 20 MHz
170 ps
not done
 not done
CEDAR
F. POWOLNY 29 / 07 / 2009

21. Thank you for your attention

22. Experimental setup Keithley 2410 33V i+ (t) SiPM i- (t)
50 Ω
50 Ω
Keithley 2410
33V
Delay + Pulse Height
10 nF
U = i+ (t) * 3e-3
Laser Pulse :
50 ps
1 to 5 photons
50 Ω
i+ (t)
SiPM
FILTER
20 Ω
i- (t)
50 Ω
CEDAR
F. POWOLNY 29 / 07 / 2009

23. NINO principle
CEDAR
F. POWOLNY 29 / 07 / 2009