Conveners
Light/Charge Response (1B)
- Ethan Bernard (Lawrence Livermore National Laboratory)
The Recoil Directionality (ReD) experiment aims to investigate the directional sensitivity of argon-based Time Projection Chambers (TPCs) via columnar recombination to nuclear recoils in the energy range of interest (20–200 keV) for direct dark matter searches. Directional information is an essential requisite for correlating a candidate dark matter signal with the expected “wind” of dark...
The Deep Underground Neutrino Experiment (DUNE) is a cutting-edge experiment for neutrino science and proton decay studies. The single-phase liquid argon prototype detector at CERN (ProtoDUNE-SP) is a crucial milestone for DUNE that will inform the construction and operation of the first, and possibly subsequent 17-kt DUNE far detector modules. We have studied the response of DUNE LArTPC...
Experimental data shows that both ionization charge and scintillation light in LAr depend on the deposited energy density (dE/dx) and electric field (𝜉). Moreover, free ionization charge and scintillation light are anticorrelated, complementary at a given (dE/dx, 𝜉) pair. We present a phenomenological model, called LArQL, that provides the anticorrelation between light and charge and also its...
The usage of optical information is ubiquitous in neutrino detectors, essential for spill-assignment, background suppression, and triggering. Enabling an independent and complete physics program at the ND-GAr component of DUNE’s near detector suite will undoubtedly benefit from this feature. We discuss in this presentation the prospects towards simultaneous readout of ionization and...
Liquid argon is being employed as a detector medium in neutrino physics and dark matter searches. A recent push to expand the applications of scintillation light in Liquid Argon Time Projection Chamber neutrino detectors has necessitated the development of new methods of simulating this light. The presently available methods tend to be prohibitively slow or imprecise due to the combination of...
ProtoDUNE-SP was a single-phase liquid argon time projection chamber - a prototype for the first far detector module of the Deep Underground Neutrino Experiment (DUNE) with an active volume of 700 tons operating until 2020. It was installed at the CERN Neutrino Platform and took particle beam and cosmic ray data over its two year lifespan. Liquid argon scintillation light is still an active...
Noble elements are the active medium of choice for several among the most important neutrino and dark matter experiments being built now. The foreseen next generation, besides going bigger, would benefit from any feature not-yet exploited of this technology.
With this goal, we performed a time-resolved spectroscopic study of the VUV/UV scintillation of gaseous argon as a function of...
The Deep Underground Neutrino Experiment (DUNE) will be the next generation long-baseline neutrino experiment. The far detector is designed as a complex of four LAr-TPC (Liquid Argon Time Projection Chamber) modules with 17 t of LAr each. The development and validation of its technology is pursued through ProtoDUNE Single Phase (ProtoDUNE-SP), a 770 t LAr-TPC at CERN Neutrino Platform....
Dual-phase noble gas Time Projection Chambers (TPCs) suffer from spurious electron background events at the lowest detectable energy region. This background is reported in liquid xenon TPCs and some of the causes are discussed in the literature. Understanding its origin is of paramount importance as this background sets the analysis threshold and affects the most sensitive part of the region...
As field of application of noble elements detectors is expanding, it is becoming important to understand effects related to presence of impurities. Here we present several examples of known energetic long-living molecules which can be produced in detectors under action of ionizing radiation and UV light.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence...
