single-photon timing resolution in digital silicon ... · 1 single-photon timing resolution in...
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Single-Photon Timing Resolution in Digital Silicon Photomultipliers
E. Venialgo1, J.-F. Pratte2, S. Brunner3, and E. Charbon4
1Applied Quantum Architectures department, Delft University of Technology, Delft, Netherlands. 2Department of Electrical and Computer Engineering, Université de Sherbrooke, Sherbrooke, QC, Canada. 3Radiation Science & Technology department, Delft University of Technology, Delft, The Netherlands. 4Advanced Quantum Architecture Laboratory, EPFL, Lausanne, Switzerland.
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Main objective of this talk
Discuss and propose a standardization methods for SPTR measurements in
Digital SiPMs
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Outline
• Definition of SPTR
• Digital SiPM architectures
• Setup examples
• Parameters and standardization
• Conclusions
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Single-Photon Timing Resolution
“The timing response of a SiPM is represented as a statistical distribution characterized by its precision, accuracy, and bin size (LSB)”
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Single-Photon Timing Resolution
“The timing response of a SiPM is represented as a statistical distribution characterized by its precision, accuracy, and bin size (LSB)”
accuracy
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Single-Photon Timing Resolution
“The timing response of a SiPM is represented as a statistical distribution characterized by its precision, accuracy, and bin size (LSB)”
precision
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Single-Photon Timing Resolution
“The timing response of a SiPM is represented as a statistical distribution characterized by its precision, accuracy, and bin size (LSB)”
bin size (LSB)
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Conditions and techniques
• Single-photon light level
• Uniform illumination over the sensitive area
• TCSPC measurement technique
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SPTR impact on applications (PET)
D-SiPM
SCINTILLATOR
511 keV Gamma Photon
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SPTR impact on applications (PET)
D-SiPM
SCINTILLATOR
511 keV Gamma Photon Q: total photoelectrons
Tr: rise time
Td: decay time
: SPTR
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SPTR impact on applications (PET)
D-SiPM
SCINTILLATOR
511 keV Gamma Photon Q: total photoelectrons
Tr: rise time
Td: decay time
: SPTR
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SPTR impact on applications (PET)
D-SiPM
SCINTILLATOR
511 keV Gamma Photon Q: total photoelectrons
Tr: rise time
Td: decay time
: SPTR
SORTING PROCESS
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Digital SiPM architectures
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Digital SiPM concepts
6400 SPADs
1 time stamp
TDC
T. Frach et al., NSSMIC 2009
digital photon counter (DPC)
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Digital SiPM concepts
6400 SPADs
1 time stamp
TDC
26x16 SPADs
48 individual time stamps
48 TDC
T. Frach et al., NSSMIC 2009 S. Mandai et al., NSSMIC 2012
digital photon counter (DPC)
Multichannel digital SiPM (MD-SiPM)
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Digital SiPM concepts
6400 SPADs
1 time stamp
TDC
26x16 SPADs
48 individual time stamps
48 TDC 1 SPAD per TDC
N individual time stamps
T. Frach et al., NSSMIC 2009 S. Mandai et al., NSSMIC 2012 Pratte et al. 3DIC-IEEE 2010
3D digital SiPM (3DdSiPM) digital photon counter (DPC)
Multichannel digital SiPM (MD-SiPM)
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Digital Photon Counter (DPC)
• each die has 4 pixels
• two TDCs per die
• 4 sub-pixels
• 3200 or 6400 SPADs per
pixel • programmable trigger and
validation logic
• individual SPAD cell masking
circuitry
• TDC bin size: 24 ps
T. Frach et al., NSSMIC 2009
S. Brunner et al., JINST 2016
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9x18 Array of MD-SiPMs
9 x 18 MD-SiPMs
432 TDCs
26x16 Pixels
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
26x16 SPADs
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9x18 Array of MD-SiPMs
architectural overview
a 2D 9x18 MD-SiPM array.
9 TDC banks with each having 48
TDCs..
configuration memory and masking
registers.
readout logic and discriminator.
9x18 MD-SiPM Array
Dec
od
er
Smart Reset Decision Logic
Masking / Energy Calculation
Co
nfi
g
MD-SiPM: 16x26 SPADs
48x9 Column-parallel TDC Matrix
48 timing/energy lines
Serializer / IOs
Ref
s.
PVTB High Voltage Generator
Augusto Carimatto; Shingo Mandai;
Esteban Venialgo; Ting Gong; Giacomo
Borghi; Dennis R. Schaart; Edoardo
Charbon. ISSCC, 2015
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3D digital SiPM
3D Integration • high fill factor
• heterogeneous
technologies
integration
Teledyne Dalsa Custom process
TSMC CMOS 65 nm
256 SPAD readout ASIC
Pratte et al. 3DIC-IEEE 2010
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Digital SiPM overview
Post-processing
256 Pixels
QC TDC SPAD
Channel
QC TDC SPAD
Channel
QC TDC SPAD
Channel
QC TDC SPAD
Channel
Array Readout
A) Calibration and correction
B) Timestamp sorting
C) Dark count filter
D) Multi-photon estimation
Out 2
Out 5
Out 3
Out 4
Out 1
Pratte et al. 3DIC-IEEE 2010
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Setup examples
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Typical setup (MD-SiPM)
picosecond Laser
• power
• repetition rate
• wavelength
• pulse width (40 ps)
Advaced laser diode
systems. EIG1000 AF.
Head: PiL040F, 405 nm,
SANYO laser diode DL-
5146-152
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Typical setup (MD-SiPM)
optical interface
• NDF
• diffuser
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Typical setup (MD-SiPM) MD-SiPM
• bias voltage
• temperature
• DCR
• ......
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Typical setup (MD-SiPM)
readout FPGA
• CLK source
• STOP/START
• ML507 Xilinx, Virtex-5
• human data [XCM-206Z]Xilinx Spartan-6 FGG676
• custom Microsemi AGL1000V2−CS281 board
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Typical setup (MD-SiPM) acquisition computer
• KDE
• measurement error
• calibration procedures
• custom USB-2.0 interface
• ethernet 1Gbps
• matlab/Linux
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Typical setup (MD-SiPM)
picosecond
laser head
NDF diffuser fan
MD-SiPM + readout
PC interface
synchronization signal
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SPTR measurement MD-SiPM
• excess bias voltage
• timing line settings
S. Mandai, PhD. Thesis, TU-Delft ,2014
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
optical table two 2x6' tables one 2x8' table
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
SP- Mai Tai Ultrafast Ti-Sapphire Laser pulse width : < 100 fs repetition rate : 80 MHz wavelength : 690 - 1040 nm average power : 3.0 W
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
SP- Optical Parametric Oscillator pulse width : < 100 fs repetition rate : 80 MHz wavelength : 345 - 2500nm average power : 100 mW - 1.0 W
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
variable attenuator high power optics glen polarizer 1/2 wave plate beam dump
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
reference PIN diode Becker & Hickl PHD-400 200 ps rise time
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
free space beam propagation high-end Newport mirrors for ultrafast laser
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
beam conditioning setup iris, shutter, filter, beam splitter, focusing optics
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
sample fixture - automated XYZ-axis stage - manual tilt, yaw and rotation axis
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Sherbrooke’s SPTR setup
Mai Tai OPO att. PIN
Beam DUT Scope
high power
low power
photon starved
output signals SMA cable (ref diode and DUT) oscilloscope - LeCroy SDA 6000A 20 GS/s, 6 GHz - Keysight MSOX91304A 80 GS/s, 13 GHz
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Beam conditioning setup
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- laser input for SPTR measurements
- neutral density filters (photon starved)
- beam focusing (down to ~2um spot size)
- XYZ motorized stage (array sweep, ~1um step)
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Typical SPTR acquisition
Setup jitter
• PIN ref diode pulse to pulse
jitter
• include electronic jitter (SMA,
scope) • include Mai Tai / OPO pulse
to pulse jitter (negligible)
• Value : 3-4 ps FWHM
A SPAD SPTR acquisition
• time delay between the SPAD output
(pink) and the ref. signal (blue)
• histogram building (100k events)
• FWHM extract
𝜎mesured
2 = 𝜎setup2 + 𝜎
detector
2
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SPAD + front-end SPTR
• TSMC 65 nm
• SPAD implemented for test purpose (and fun)
• 20 µm diameter
SPAD
Front-end
SPTR:
8.9 ps FWHM
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DPC SPTR (measurement setup)
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S. Brunner et al., JINST 2016
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DPC SPTR (results)
S. Brunner et al., JINST 2016
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DPC SPTR (results)
Temperature ºC S. Brunner et al., JINST 2016
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DPC SPTR (results)
Active area S. Brunner et al., JINST 2016
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DPC SPTR (results)
Masking level
S. Brunner et al., JINST 2016
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Parameters and standardization
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Timing propagation (architecture)
TDC: single-shot resolution
range LSB
INL/DNL
timing line: detection circuit
threshold bias voltage
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
event discriminator
operation mode
readout
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Timing propagation (architecture)
TDC: single-shot resolution
range LSB
INL/DNL
timing line: detection circuit
threshold bias voltage
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
event discriminator
operation mode
readout
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Timing propagation (architecture)
TDC: single-shot resolution
range LSB
INL/DNL
timing line: detection circuit
threshold bias voltage
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
event discriminator
operation mode
readout
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Timing propagation (architecture)
TDC: single-shot resolution
range LSB
INL/DNL
timing line: detection circuit
threshold bias voltage
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
quenching circuit
detection circuit masking memory
bias voltages
event discriminator
operation mode
readout
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Common architectural components
• Time-to-digital converters (LSB, INL, DNL, SSR)
– several TDCs: best, worst, and median
• Operation mode
– event discriminator, triggering system, reset system, measurement range
• SPAD-cell operation
– masking [%], excess bias, quenching, TH, activated area
• Timing line settings and characterization
– inverter, comparator TH, preamplifier
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Timing measurement (setup)
optics: attenuator
diffuser optical parametric oscillator
mirrors splitters
laser: pulse width
Power wavelength
repetition rate
Digital SiPM
optical reference readout FPGA oscilloscope
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Timing measurement (setup)
optics: attenuator
diffuser optical parametric oscillator
mirrors splitters
laser: pulse width
power wavelength
repetition rate
Digital SiPM
electrical reference readout FPGA
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Common setup components
• Optical components – light attenuator (SPAD rate, single-photon level) – light diffuser (uniformity). SPAD camera measurement – etc
• Laser system – pulse width, wavelength, CLK jitter, repetition rate
• D-SiPM controller and synchronization system with respect to the laser pulse – optical/electrical
• Measurement conditions: temperature, power, heatsinks, etc
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Conclusions
• Digital SiPM standardization relies on two main aspects: the D-SiPM architecture and the measurement setup
• In a standardization procedure, the common architectural parameters are established and specific features related to timing are also reported.
• The measurement setup can be divided into two types: high timing resolution (<100 ps) and standard timing resolution (>100 ps)
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Acknowledgments • Swiss National Science Foundation
• STW
• 3IT
• RAMS
• NSERC CRSNG
• CMC MIcrosystems
• RESMIQ
• CANADA FIRST
• Fonds de recherche nature et technologie Québec
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References • S. Mandai and E. Charbon, "Multi-channel digital SiPMs: Concept, analysis and implementation," 2012 IEEE Nuclear
Science Symposium and Medical Imaging Conference Record (NSS/MIC), Anaheim, CA, 2012, pp. 1840-1844. doi: 10.1109/NSSMIC.2012.6551429
• L. H. C. Braga et al., "An 8×16-pixel 92kSPAD time-resolved sensor with on-pixel 64ps 12b TDC and 100MS/s real-time energy histogramming in 0.13µm CIS technology for PET/MRI applications," 2013 IEEE International Solid-State Circuits Conference Digest of Technical Papers, San Francisco, CA, 2013, pp. 486-487. doi: 10.1109/ISSCC.2013.6487826
• T. Frach, G. Prescher, C. Degenhardt, R. de Gruyter, A. Schmitz and R. Ballizany, "The digital silicon photomultiplier — Principle of operation and intrinsic detector performance," 2009 IEEE Nuclear Science Symposium Conference Record (NSS/MIC), Orlando, FL, 2009, pp. 1959-1965. doi: 10.1109/NSSMIC.2009.5402143
• Bérubé, Benoit-Louis, et al. Development of a single photon avalanche diode (SPAD) array in high voltage CMOS 0.8 µm dedicated to a 3D integrated circuit (3DIC). In: Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE. IEEE, 2012. p. 1835-1839.
• BRUNNER, S. E., et al. A comprehensive characterization of the time resolution of the Philips Digital Photon Counter. Journal of Instrumentation, 2016, 11.11: P11004.
• A. Carimatto et al., "11.4 A 67,392-SPAD PVTB-compensated multi-channel digital SiPM with 432 column-parallel 48ps 17b TDCs for endoscopic time-of-flight PET," 2015 IEEE International Solid-State Circuits Conference - (ISSCC) Digest of Technical Papers, San Francisco, CA, 2015, pp. 1-3. doi: 10.1109/ISSCC.2015.7062996
• FISHBURN, Matthew W.; CHARBON, Edoardo. System tradeoffs in gamma-ray detection utilizing SPAD arrays and scintillators. IEEE Transactions on Nuclear Science, 2010, 57.5: 2549-2557.
• SEIFERT, Stefan; VAN DAM, Herman T.; SCHAART, Dennis R. The lower bound on the timing resolution of scintillation detectors. Physics in Medicine & Biology, 2012, 57.7: 1797.
• VENIALGO, Esteban, et al. Time estimation with multichannel digital silicon photomultipliers. Physics in Medicine & Biology, 2015, 60.6: 2435.