The adhesion of the p-terphenyl film to the substrate used in the X-ARAPUCA dichroic filter is directly correlated to the long-term efficiency of this device. Six different cleaning methods were established before deposition with the intention of analyzing their contributions to the adhesion process of the film to the substrate. Three distinct techniques were used in the adhesion tests. The...
Dark matter (DM), which constitutes five-sixths of all matter, is hypothesized to be a weakly interacting non-baryonic particle, created in the early stages of cosmic evolution. There are several experiments that aim for the detection of DM. One of the most promising candidates of DM is the Weakly Interacting Massive Particles or WIMPs. The DarkSide project aims at the direct detection of DM....
In this work, we describe a cryogenic setup for the study of wavelength-shifting materials for optimised light collection in noble element radiation detectors, and discuss the commissioning results. This SiPM-based setup uses alpha induced scintillation in gaseous argon as the vacuum ultraviolet light source with the goal of characterising materials, such as polyethylene naphthalate (PEN)...
Liquid argon (LAr) detectors are deployed in rare event searches such as dark matter searches, neutrino oscillation experiments, and experiments searching for neutrinoless double beta decay. These detectors rely on wavelength shifting (WLS) materials to convert argon scintillation light (at 128 nm) to visible wavelengths, enabling efficient light collection with reflectors and detection by...
Liquid argon is used as active media in several neutrino and dark matter experiments (DUNE, SBND, Microboone, Icarus, Dark Side, DEAP, …). Ionization particles in liquid argon produce free charges and scintillation photons. Both signals are used to perform calorimetric measurements, particle identification, three dimensional reconstruction. Liquid argon scintillation light can be quenched and...
Liquid argon and liquid xenon detectors often encounter high voltage issues at much smaller fields than the theoretical breakdown limit. Minor electron emission events from high voltage electrodes are often sufficient to produce unacceptable deadimes, backgrounds to the physics to be investigated, and may even be harbingers of impending breakdown. These problems become more acute as the size...
This work focuses on addressing the challenges associated with photodetection systems in liquid noble experiments. These systems typically incorporate an external wavelength shifter film, which is deposited over an optical element. However, this approach poses several issues such as cross-contamination, mechanical and chemical stresses, and photobleaching. To overcome these limitations, our...
The Noble Element Simulation Technique (NEST) is a toolkit for simulating signals in noble liquid detectors. A variety of models have been developed to simulate ionization and scintillation signals in argon- and xenon-based detectors, trained and benchmarked against a body of data published in rare-event search experiments and dedicated calibration measurements. This presentation will discuss...
DEAP-3600 is a single-phase liquid argon (LAr) direct-detection dark matter experiment, operating 2 km underground at SNOLAB (Sudbury, Canada). The detector consists of 3.3 tons of Lar contained in a spherical acrylic vessel. At WIMP masses of 100 GeV, DEAP-3600 has a projected sensitivity of 10−46 cm2 for the spin independent elastic scattering cross section of WIMPs. External radioactive...
