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SUMMARY:Scintillation light yield of solid Xenon
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UID:indico-contribution-14-26@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Marco Guarise (University of Ferrara)\nScintillation
  properties of rare gas materials are of primary importance for the next g
 eneration dark matter and neutrino experiments. Above the liquid phase of 
 such elements\, also solid crystals can be used for suitable detection sch
 emes but unfortunately only sporadic data regarding the luminescence prope
 rties of Xenon at temperatures uder its melting point are present in liter
 ature. In this contribution\, we present a study of the scintillation ligh
 t yield of Xenon in the solid phase at different temperatures in the range
  (30−160)K. This study has been carried out exploiting the light emissio
 n from solid Xenon consequent to the energy release of cosmic rays in the 
 crystal.\n\nhttps://indico.physics.ucsd.edu/event/1/contributions/26/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/26/
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SUMMARY:Scintillation-based background rejection methods in large scale LA
 rTPCs
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UID:indico-contribution-14-21@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Anyssa Navrer-Agasson (The University of Manchester)
 \nLarge scale single-phase liquid argon time projection chambers (LArTPCs)
  such as DUNE can achieve MeV-scale thresholds\, making them sensitive to 
 solar and supernova neutrinos. In this energy region\, low energy activity
  from radiological sources can be a dominant background. LArTPCs can make 
 use of the scintillation light to discriminate against radiological backgr
 ounds. This talk will present rejection methods exploiting the scintillati
 on light in LArTPCs. We studied a range of detector configurations and rej
 ection approaches based on the properties of the light (pulse shape discri
 mination) and/or on the detector design.\n\nhttps://indico.physics.ucsd.ed
 u/event/1/contributions/21/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/21/
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SUMMARY:Measurement of the Light-Yield in MicroBooNE with Isolated Protons
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UID:indico-contribution-14-101@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Jiaoyang Li (the University of Edinburgh)\nThe Micro
 BooNE detector is an 85-ton active mass Liquid Argon Time Projection Chamb
 er (LArTPC) located on-axis along the Booster Neutrino Beam (BNB). It serv
 es as a part of the Short-Baseline Neutrino (SBN) program at Fermilab\, wh
 ich was primarily designed to address the eV-scale sterile neutrinos. The 
 primary signal channel in the LArTPC is ionisation\, but the argon also em
 its large quantities of scintillation light. Prompt scintillation light in
  MicroBooNE is recorded with an array of 32 PhotoMultiplier Tubes (PMTs). 
 The scintillation light is used to determine the timing of neutrino intera
 ctions and to reject cosmic-ray activity.We present a new method of measur
 ing the light-yield using isolated proton events\, which enables a positio
 n-dependent light-yield measurement to map the response of the detector ac
 ross its volume. This method can be used to calibrate the light response i
 n large-scale LArTPC detectors as well as to test assumptions used in simu
 lating scintillation light.\n\nhttps://indico.physics.ucsd.edu/event/1/con
 tributions/101/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/101/
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SUMMARY:A Monte Carlo detector response model for solar neutrino absorptio
 n on 40Ar in DEAP-3600
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UID:indico-contribution-14-73@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Andrew Erlandson (Carleton University)\nDEAP-3600 is
  a liquid argon (LAr) scintillation detector designed to search for Weakly
  Interacting Massive Particles (WIMPs) at SNOLAB. Beyond the search for da
 rk matter\, the DEAP-3600 detector is also intrinsically sensitive to char
 ged current interactions on 40Ar from 8B solar neutrinos. Here we present 
 the expected detector response to high energy delayed coincidence events r
 esulting from neutrino absorption on the ~3.2 tonne target mass. We exploi
 t the Marley event generator in conjunction with a full optical simulation
  of the DEAP-3600 detector using the Reactor Analysis Tool (RAT). Through 
 the delayed coincidence channel\, we expect an event yield of (4.69 ± 0.4
 3) events in a 7.20 tonne-year exposure in DEAP-3600.\n\nhttps://indico.ph
 ysics.ucsd.edu/event/1/contributions/73/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/73/
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SUMMARY:Simulating and Validating the X-ARAPUCA light sensors
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UID:indico-contribution-14-5@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Gustavo Valdiviesso (Universidade Federal de Alfenas
  Unifal-MG)\nBrazil's native people have an ingenious trap to catch birds 
 called arapuca. Our ARAPUCA is a light trap that increases the collection 
 area of regular SiPMs by making use of wavelength shifters and a dichroic 
 filter. Its latest iteration\, the X-ARAPUCA\, will be used alongside PMTs
  in Short-Baseline Near Detector (SBND) and as the standalone photon detec
 tor in the Deep Underground Neutrino Experiment (DUNE). The SBND is part o
 f the three-detectors Short-Baseline Neutrino (SBN) Program\, search for a
  possible sterile neutrino in short-baseline oscillations (with SBND locat
 ed at 100m from the source)\, while DUNE will look for signs of CP-violati
 on in long-baseline (1300km) oscillations\, among other items in a rich ph
 ysics program. Contributing with both experiments\, we developed detailed 
 simulations of each optical element\, from which we highlight the dichroic
  filter and the wavelength shifters. While the backbone of the simulation 
 uses Geant4\, these two elements were implemented from scratch to ensure t
 hey would represent our device. The models were individually validated usi
 ng dedicated characterization data and the resulting simulation reproduces
  the physical device behavior without the need for a back-fitting calibrat
 ion. In this presentation we will elaborate on the computer models and the
  validation processes for each element and compare the resulting full simu
 lation with the X-ARAPUCA's most recent tests.\n\nhttps://indico.physics.u
 csd.edu/event/1/contributions/5/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/5/
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SUMMARY:Measurements of the X-Arapuca single-cell light detection efficien
 cy.
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UID:indico-contribution-14-44@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Henrique Souza (University of Campinas)\, Ettore Seg
 reto (Unicamp)\nThe X-Arapuca (XA) supercell is the basic unit of the Phot
 on Detection System (PDS) of the Deep Underground Neutrino Experiment (DUN
 E). In total\, 1\,500 X-Arapuca with approximate dimensions of 210 x 12 cm
 $^2$ will be installed on the anode planes of the liquid argon time projec
 tion chamber (LArTPC). In the XA light trap device\, the liquid argon scin
 tillation light (with wavelength around 127 nm) is absorbed by a thin laye
 r of para-Terphenyl (pTP) coated on a dichroic filter window which constit
 utes its acceptance window. PTP re-emits photons around 350 nm\, above the
  filter cutoff. The light which enters the XA is downshifted again by the 
 inner wavelength shifter plate (WLS plate) to a wavelength around 430 nm. 
 The cut-off of the dichroic filter is placed at 400 nm: this allows the pT
 P shifted light to enter in the X-Arapuca and to trap the fraction of phot
 ons which escape from total internal reflection in the WLS plate. The ligh
 t is collected by an array of silicon photo-sensors (SiPM) coupled at the 
 edges of the WLS plate. In this work\, we present the first characterizati
 on of the photon detection efficiency of an X-Arapuca prototype sizing 10 
 x 7.5 cm$^2$ in Brazil\, where the X-Arapuca was exposed to alpha particle
 s\, cosmic muons and gammas in liquid argon. Operating the SiPMs at +5 and
  +5.5 V over the breakdown voltage\, an efficiency ranging from 2.2% to 2.
 3% and from 2.7% to 3.1% was found\, respectively.\n\nhttps://indico.physi
 cs.ucsd.edu/event/1/contributions/44/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/44/
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SUMMARY:Role of a-Se device configuration in UV detection efficiency chara
 cterized by Time of Flight
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UID:indico-contribution-14-86@indico.physics.ucsd.edu
DESCRIPTION:Speakers: Kaitlin Hellier (University of California\, Santa Cr
 uz)\nAmorphous selenium (a-Se) detectors have made significant advances in
  the last few decades\, with applications in X-ray\, UV\, and visible ligh
 t detection and potential for high energy particle detection. A vertical a
 rchitecture\, in which light passes through a transparent conductor to the
  a-Se layer\, is common in commercial devices\; however\, a lateral struct
 ure\, in which light passes only through the selenium positioned between t
 wo contacts\, presents an opportunity for improved device performance and 
 application. In this work we compare the performance of vertical devices w
 ith a-Se thicknesses of 5\, 10\, and 15 um and lateral devices with electr
 ode spacing of the same distances\, using time of flight (TOF) and convers
 ion efficiency\, and introduce optical slits for lateral structures as a w
 ay to better perform carrier specific TOF in a-Se devices.\n\nhttps://indi
 co.physics.ucsd.edu/event/1/contributions/86/
LOCATION:
URL:https://indico.physics.ucsd.edu/event/1/contributions/86/
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