A5070140640- Dark Matter and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Photocathodes and Microchannel Plates
- CCD and CMOS Imaging Sensors
- Quantum, superfluid, helium dynamics
- Space Science and Extraterrestrial Life
- Radiation Effects in Electronics
- Astronomy and Astrophysical Research
- Medical Imaging Techniques and Applications
- Neutrino Physics Research
- Radioactivity and Radon Measurements
Snolab
2025
TRIUMF
2018-2024
Queen's University
2016
Abstract The knowledge of scintillation quenching $$\alpha $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>α</mml:mi> </mml:math> -particles plays a paramount role in understanding -induced backgrounds and improving the sensitivity liquid argon-based direct detection dark matter experiments. We performed relative measurement MeV energy region using radioactive isotopes ( $$^{222}$$ <mml:mmultiscripts> <mml:mrow/> <mml:mn>222</mml:mn> </mml:mmultiscripts> Rn, $$^{218}$$...
The DEAP-3600 experiment is a single-phase detector that uses 3600 Kg of liquid argon to search for Dark Matter at SNOLAB, Sudbury, Canada, 6800 ft. underground. projected sensitivity the spin-independent WIMP-nucleon cross-section 10-46 cm2 WIMP mass 100 GeV.
Direct searches for dark matter with large-scale noble liquid detectors have become sensitive enough to detect the coherent scattering of local neutrinos. This will a very challenging background discovery in planned future detectors. For mass above 10 GeV, dominant neutrino backgrounds on Earth are atmospheric neutrinos created by cosmic ray collisions atmosphere. In contrast, Moon has almost no atmosphere and nearly all rays incident first collide lunar surface, producing different...
The Scintillating Bubble Chamber (SBC) collaboration purchased 32 Hamamatsu VUV4 silicon photomultipliers (SiPMs) for use in SBC-LAr10, a bubble chamber containing 10~kg of liquid argon. A dark-count characterization technique, which avoids the single-photon source, was used at two temperatures to measure SiPMs breakdown voltage ($V_{\text{BD}}$), SiPM gain ($g_{\text{SiPM}}$), rate change $g_{\text{SiPM}}$ with respect ($m$), dark count (DCR), and probability correlated avalanche...
The knowledge of scintillation quenching $\alpha$-particles plays a paramount role in understanding $\alpha$-induced backgrounds and improving the sensitivity liquid argon-based direct detection dark matter experiments. We performed relative measurement MeV energy region using radioactive isotopes ($^{222}$Rn, $^{218}$Po $^{214}$Po isotopes) present trace amounts DEAP-3600 detector quantified uncertainty extrapolating factor to low-energy region.
A device filled with pure xenon first demonstrated the ability to operate simultaneously as a bubble chamber and scintillation detector in 2017. Initial results from data taken at thermodynamic thresholds down ~4 keV showed sensitivity ~20 nuclear recoils no observable nucleation by $\gamma$-ray interactions. This paper presents further operation of same low 0.50 keV, hardware limited. The has now been shown have ~1 while remaining insensitive $\gamma$-rays. robust calibration chamber's...
Direct searches for dark matter with large-scale noble liquid detectors have become sensitive enough to detect the coherent scattering of local neutrinos. This will a very challenging background discovery in planned future detectors. For mass above 10 GeV, dominant neutrino backgrounds on Earth are atmospheric neutrinos created by cosmic ray collisions atmosphere. In contrast, Moon has almost no atmosphere and nearly all rays incident first collide lunar surface, producing different...
The Light only Liquid Xenon (LoLX) experiment is a prototype detector aimed to study liquid xenon (LXe) light properties and various photodetection technologies. LoLX also quantify LXe's time resolution as potential scintillator for 10~ps time-of-flight (TOF) PET. Another key goal of perform time-based separation Cerenkov scintillation photons new background rejection methods in LXe experiments. To achieve this separation, set be equipped with photon-to-digital converters (PDCs), photosensor...