A5018481493- Advanced Optical Sensing Technologies
- Radiation Detection and Scintillator Technologies
- Dark Matter and Cosmic Phenomena
- CCD and CMOS Imaging Sensors
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Photonic and Optical Devices
- Particle Detector Development and Performance
- Advancements in PLL and VCO Technologies
- Advanced Fluorescence Microscopy Techniques
- Analytical Chemistry and Sensors
- Quantum Computing Algorithms and Architecture
- Atmospheric Ozone and Climate
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Medical Imaging Techniques and Applications
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Photocathodes and Microchannel Plates
- Radio Frequency Integrated Circuit Design
- Advanced Surface Polishing Techniques
- Semiconductor Quantum Structures and Devices
- Advanced Vision and Imaging
- Laser Material Processing Techniques
- Quantum, superfluid, helium dynamics
Université de Sherbrooke
2016-2024
Microsoft (United States)
2024
Microsoft Research (United Kingdom)
2023
Institute of High Energy Physics
2020-2021
Chinese Academy of Sciences
2020-2021
University of Massachusetts Amherst
2019
The next-generation Enriched Xenon Observatory (nEXO) is a proposed experiment to search for neutrinoless double beta ($0\nu\beta\beta$) decay in $^{136}$Xe with target half-life sensitivity of approximately $10^{28}$ years using $5\times10^3$ kg isotopically enriched liquid-xenon time projection chamber. This improvement two orders magnitude over current limits obtained by significant increase the mass, monolithic and homogeneous configuration active medium, multi-parameter measurements...
Abstract The nEXO neutrinoless double beta (0 νββ ) decay experiment is designed to use a time projection chamber and 5000 kg of isotopically enriched liquid xenon search for the in 136 Xe. Progress detector design, paired with higher fidelity its simulation an advanced data analysis, based on one used final results EXO-200, produce sensitivity prediction that exceeds half-life 10 28 years. Specifically, improvements have been made understanding production scintillation photons charge as...
The projected performance and detector configuration of nEXO are described in this pre-Conceptual Design Report (pCDR). is a tonne-scale neutrinoless double beta ($0νββ$) decay search $^{136}$Xe, based on the ultra-low background liquid xenon technology validated by EXO-200. With $\simeq$ 5000 kg enriched to 90% isotope 136, has half-life sensitivity approximately $10^{28}$ years. This represents an improvement about two orders magnitude with respect current results. Based experience gained...
This paper presents a new quenching circuit (QC) and single photon avalanche diode (SPAD) implemented in TSMC CMOS 65 nm technology. The QC was optimized for timing resolution (SPTR) with view to an implementation 3D digital SiPM. presented has jitter of 4 ps full width at half maximum (FWHM) the SPAD 7.8 FWHM SPTR. adjustable threshold allows optimization as well excess voltage rise time characterization. threshold, hold-off recharge are essential optimize performances each SPAD. also...
Future tonne-scale liquefied noble gas detectors depend on efficient light detection in the VUV range. In past years Silicon Photomultipliers (SiPMs) have emerged as a valid alternative to standard photomultiplier tubes or large area avalanche photodiodes. The next generation double beta decay experiment, nEXO, with 5 tonne liquid xenon time projection chamber, will use SiPMs for detecting $178\,\text{nm}$ scintillation light, order achieve an energy resolution of $\sigma / Q_{\beta\beta} =...
Time-of-flight measurements are becoming essential to the advancement of several fields, such as preclinical positron emission tomography and high energy physics. Recent developments in single photon avalanche diode (SPAD)-based detectors have spawned a great interest digital silicon photomultipliers (dSiPMs). To overcome tradeoff between photosensitive area processing capabilities current 2-D dSiPM, we propose novel 3-D SiPM, where SPAD, designed for maximal area, will be stacked over...
The 3D vertical integration of SPAD and readout electronics is a promising avenue to high performance photodetectors. This approach will minimize most limitations current SiPM lead better performances in terms effective PDE, timing added functionalities. In this paper, we present new integrated digital electronic architecture. specific architecture aims replace conventional analog with the benefits significantly lower constant output capacitance as well immunity gain variation on single...
Abstract A new trend in large area noble liquid experiments is to measure the scintillation light with photodetectors and their electronics inside active volume. Compared typical approach of using silicon photomultipliers (SiPM) an analog readout chain leading analog-to-digital converter, this paper presents a 3D photon-to-digital converter (PDC) that takes advantage binary nature single-photon avalanche diodes (SPAD). The contains 4096 pixels over 25 mm 2 , each including bonding pad...
Understanding reflective properties of materials and photodetection efficiency (PDE) photodetectors is important for optimizing energy resolution sensitivity the next generation neutrinoless double beta decay, direct detection dark matter, neutrino oscillation experiments that will use noble liquid gases, such as nEXO, DARWIN, DarkSide-20k, DUNE . Little information currently available about reflectivity PDE in because measurements are difficult to conduct a cryogenic environment at short...
Characterization of the vacuum ultraviolet (VUV) reflectance silicon photomultipliers (SiPMs) is important for large-scale SiPM-based photodetector systems. We report angular dependence specular in a SiPMs manufactured by Fondazionc Bruno Kessler (FBK) and Hamamatsu Photonics K.K. (HPK) over wavelengths ranging from 120 nm to 280 nm. Refractive index extinction coefficient thin silicon-dioxide film deposited on surface FBK are derived data wafer with same oxide as SiPMs. The diffuse also...
nEXO is a proposed experiment to search for the neutrino-less double beta decay (0νββ) of 136Xe in tonne-scale liquid xenon time projection chamber (TPC) . The TPC will be equipped with charge collection tiles form anode. In this work, reconstruction performance anode design studied dedicated simulation package. A multi-variate method and deep neural network are developed distinguish simulated 0νββ signals from backgrounds arising trace levels natural radioactivity detector materials. These...
A Vernier ring-oscillator-based time-to-digital converter (TDC) with a new prelogic is presented. Experimental results show that the proposed architecture achieve 5.5 ps RMS timing jitter 5.1 LSB within an area of . Thanks to circuit, power consumption circuit was optimised at rate 1 Mevents/s for dynamic range 4 ns. The area, and make TDC suitable array electronic readout in position emission tomography single photon avalanche diode based detectors.
A new design for the anode of a time projection chamber, consisting charge-detecting "tile", is investigated use in large scale liquid xenon detectors. The tile produced by depositing 60 orthogonal metal charge-collecting strips, 3 mm wide, on 10 cm × fused-silica wafer. These charge tiles may be employed detectors, such as proposed tonne-scale nEXO experiment to search neutrinoless double-beta decay. Modular design, an array can cover sizable area. width each strip small compared size tile,...
Silicon photomultipliers are regarded as a very promising technology for next-generation, cutting-edge detectors low-background experiments in particle physics. This work presents systematic reflectivity studies of Photomultipliers (SiPM) and other samples liquid xenon at vacuum ultraviolet (VUV) wavelengths. A dedicated setup the University Münster has been used that allows to acquire angle-resolved reflection measurements various immersed with 0.45° angular resolution. Four investigated...
The search for neutrinoless double beta decay probes the fundamental properties of neutrinos, including whether or not neutrino and antineutrino are distinct. Double detectors large expensive, so background reduction is essential extracting highest sensitivity. identification, 'tagging', $^{136}$Ba daughter atom from $^{136}$Xe provides a technique eliminating backgrounds in nEXO experiment. tagging scheme studied this work utilizes cryogenic probe to trap barium solid xenon, where tagged...
We report on the performance of silicon photomultiplier (SiPM) light sensors operating in electric field strength up to 30 kV/cm and at a temperature 149 K, relative their absence an external field. The SiPM devices used this study show stable gain, photon detection efficiency, rates correlated pulses, when exposed fields, within estimated uncertainties. No visible damage surface was caused by exposure.
Abstract The characterization of nuisance parameters in digital silicon photomultipliers (SiPMs) is important to their understanding and future development. Methods able distinguish the types events are necessary obtain fair legitimate measurements. In this work, zero photon probability (ZPP) method time delay (TD) used measure dark noise SiPMs free from contribution correlated such as afterpulsing crosstalk. It highlights unique features holdoff delay, output signal, embedded processing...