BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Overview and Current Status of the X-ARAPUCA Light Collection Syst em in SBND DTSTART;VALUE=DATE-TIME:20210914T215500Z DTEND;VALUE=DATE-TIME:20210914T221000Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-42@indico.physics.ucsd.edu DESCRIPTION:Speakers: Polina Abratenko ()\nThe Short-Baseline Near Detecto r (SBND) is a Liquid-Argon Time Projection Chamber (LArTPC) currently unde r construction at Fermilab. SBND is one of three detectors that make up th e Short Baseline Neutrino (SBN) program\, which aims to investigate the ex cess of low-energy electron-like events observed by the MiniBooNE and LSND experiments\, as well as perform high-precision neutrino-argon cross sect ion measurements. SBND plans to use a novel light collection system which includes X-ARAPUCA devices\, made up of a series of dichroic and wavelengt h-shifting filters that collect photons using SiPMs. This X-ARAPUCA system is also the light collection technology planned for the future DUNE exper iment. This talk will give an overview of the X-ARAPUCA system in SBND as well as cover the current status of testing and implementation.\n\nhttps:/ /indico.physics.ucsd.edu/event/1/contributions/42/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/42/ END:VEVENT BEGIN:VEVENT SUMMARY:The DUNE Vertical Drift Photon Detection System DTSTART;VALUE=DATE-TIME:20210914T204000Z DTEND;VALUE=DATE-TIME:20210914T205500Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-14@indico.physics.ucsd.edu DESCRIPTION:Speakers: Laura Paulucci\, for the DUNE Collaboration ()\nThe Deep Underground Neutrino Experiment (DUNE) is a long baseline neutrino ex periment designed to mainly investigate oscillation parameters\, supernova physics and proton decay. Its far detector will be composed of four liqui d argon time projection chamber (LArTPC) underground modules\, in South Da kota-USA\, which will detect a neutrino beam produced at Fermilab\, 1300 k m away\, where a near detector will be in place. The second DUNE far detec tor module\, Vertical Drift\, will be a single phase LArTPC with electron drift along the vertical axis with two volumes of 13.5 m x 6.5 m x 60 m di mensions separated by a cathode plane. The charge collection will be perfo rmed by two anode planes\, each composed by stacked layers of a perforated PCB technology with electrode strips placed at the top and bottom ends of the module. The photon detection system (PDS) will make use of large size X-Arapuca tiles distributed over three detection planes. One plane will c onsist of a horizontal arrangement of double side tiles installed on the h igh voltage cathode plane and two vertical planes\, each placed on the lon gest cryostat membrane walls. A light active coverage of 14.8% over the ca thode and 7.4% over the laterals should allow improvements in the low ener gy physics range that can be probed in DUNE\, especially regarding superno va neutrinos (~10 MeV). We present the initial characterization of the Ver tical Drift PDS using a Monte Carlo simulation and preliminary studies on its reconstruction capabilities at the MeV scale. The information obtained with the PDS alone should allow determination of a neutrino interaction r egion with a precision of at least 65 cm for events with deposited energy above 5 MeV and the deposited energy can be reconstructed with precision b etter than 10%.\n\nhttps://indico.physics.ucsd.edu/event/1/contributions/1 4/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/14/ END:VEVENT BEGIN:VEVENT SUMMARY:Direct detection of argon scintillation light using VUV-sensitive silicon photomultipliers DTSTART;VALUE=DATE-TIME:20210914T214000Z DTEND;VALUE=DATE-TIME:20210914T215500Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-23@indico.physics.ucsd.edu DESCRIPTION:Speakers: Teal Pershing (Lawrence Livermore National Lab)\nIn recent decades\, argon-based particle detectors have become a widely-used technology for numerous applications\, including dark matter searches and neutrino measurements. For these detector designs\, WaveLength Shifters (W LS) such as tetraphenylbutadiene (TPB) are used to shift argon's scintilla tion light from the hard UV (128 nm) to visible wavelengths. In particular \, the use of PhotoMultiplier Tubes (PMTs) in argon-based detectors can re quire WLS for successful light detection and event reconstruction. Recentl y\, Hamamatsu has produced a line of Silicon PhotoMultipliers (SiPMs) whic h show appreciable photon detection efficiencies down to 100 nm\; deployin g such photosensors in an argon-based detector could bypass the need for w avelength shifting materials. This talk will present the measurement ongoi ng at LLNL to demonstrate direct detection of argon scintillation light us ing Hamamatsu's VUV-sensitive SiPMs\, as well as quantify their performanc e (gain\, cross-talk\, photon detection efficiency\, etc.) for future depl oyment in argon-based detectors.\n\nThis work was performed under the ausp ices of the U.S. Department of Energy by Lawrence Livermore National Labor atory under Contract DE-AC52-07NA27344.\n\nhttps://indico.physics.ucsd.edu /event/1/contributions/23/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/23/ END:VEVENT BEGIN:VEVENT SUMMARY:Amorphous Selenium based VUV Photodetector for use in Liquid Noble Detectors DTSTART;VALUE=DATE-TIME:20210914T211000Z DTEND;VALUE=DATE-TIME:20210914T212500Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-29@indico.physics.ucsd.edu DESCRIPTION:Speakers: Jonathan Asaadi (University of Texas at Arlington)\n Photon detectors which are sensitive to the vacuum ultraviolet (VUV) scint illation light produced in noble element particle detectors is an area of active research and development. In particular\, searching for photoconduc tive materials which are capable of converting VUV light to charge could o pen the doorway to a potentially game changing solution of an integrated c harge and light (Q+L) sensor for large area pixel based noble element dete ctors.In this talk\, we present the study of amorphous selenium based phot odetectors capable of operating at cryogenic temperatures and show the fir st measurements and characterizations made with these devices using a VUV source in a cryogenic environment.\n\nhttps://indico.physics.ucsd.edu/even t/1/contributions/29/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/29/ END:VEVENT BEGIN:VEVENT SUMMARY:Assembly and characterization of a large area VUV sensitive SiPM a rray for the nEXO TPC teststand at Stanford DTSTART;VALUE=DATE-TIME:20210914T212500Z DTEND;VALUE=DATE-TIME:20210914T214000Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-37@indico.physics.ucsd.edu DESCRIPTION:Speakers: Jacopo Dalmasson (Stanford University)\nOne of the i mportant variables to optimize for a successful detection of the neutrinol ess double-beta decay is the energy resolution at its Q-value. nEXO is a p roposed tonne-scale experiment aiming to search such decay for the isotope Xe-136. It exploits the anticorrelation between ionization and scintillat ion of xenon to improve the ultimate energy resolution. A major factor aff ecting the resolution is the fluctuation of charge and light ultimately co llected.\nIn a time projection chamber (TPC) detector\, the electron colle ction efficiency is usually close to one. Conversely\, the collection of p hotons can vary dramatically depending\, along with other factors\, on the overall light-sensitive area of the detector.\nThe Stanford liquid xenon TPC is a teststand planning to host the first VUV large area (~200cm2) SiP M array. The setup firstly aims to study the feasibility of such system wi th dedicated readout electronics and ultimately to investigate how a bette r light collection affects the detector performances\, important prototypi ng step for nEXO.\nIn this talk\, I will report on the status of the assem bly of this photodetector array\, along with characterization measurements and comparison with simulation.\n\nhttps://indico.physics.ucsd.edu/event/ 1/contributions/37/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/37/ END:VEVENT BEGIN:VEVENT SUMMARY:Charge and Light Sensing in Noble Liquid TPCs (Keynote) DTSTART;VALUE=DATE-TIME:20210914T200000Z DTEND;VALUE=DATE-TIME:20210914T204000Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-103@indico.physics.ucsd.edu DESCRIPTION:Speakers: Veljko Radeka (Brookhaven National Laboratory )\nNob le liquid time projection chambers (TPCs) are of interest for experiments in the quest to answer some most basic questions in both particle and nucl ear physics. The charge and light in both LAr and LXe in response to parti cles of interest are at the limits of detection sensitivity and accuracy o f their respective charge sensing electrodes and light sensors\, such as s ilicon photomultipliers (SiPMs). Both will be applied on a large scale in terms of the sensitive areas covered with fine segmentation and large numb ers of signal channels. All TPCs under design or planned will depend criti cally on the use of low noise electronics immersed in the cryogenic liquid (“cold electronics”) to be operated for a decade or longer. Valuable experience has been gained from the already seven years of operation of th e TPC with the lowest noise so far\, the MicroBooNE. Some highlights of th e experience with charge sensing in that TPC will be presented. The two pr oposed and planned experiments\, DUNE second 10-kton LAr module and nEXO 5 -ton LXe TPC will present similar charge sensing signal-to-noise challenge s\, but much more severe light sensing challenges. This is due to the very large areas of SiPMs required. Methods to address the light sensing chall enge\, to achieve single-photoelectron sensitivity on an array of SiPMs wh ere the avalanche charge signal is deposited on a capacitance of tens of n anofarads\, will be described and the results presented.\n\nhttps://indico .physics.ucsd.edu/event/1/contributions/103/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/103/ END:VEVENT BEGIN:VEVENT SUMMARY:Wavelength-Shifting Performance of Polyethylene Naphthalate Films in a Liquid Argon Environment DTSTART;VALUE=DATE-TIME:20210914T205500Z DTEND;VALUE=DATE-TIME:20210914T211000Z DTSTAMP;VALUE=DATE-TIME:20260606T134730Z UID:indico-contribution-4-7@indico.physics.ucsd.edu DESCRIPTION:Speakers: Ryan Dorrill (Illinois Institute of Technology)\nLiq uid argon is commonly used as a detector medium for neutrino physics and d ark matter experiments in part due to its copious scintillation light prod uction in response to its excitation and ionization by charged particle in teractions. As argon scintillation appears in the vacuum ultraviolet (VUV) regime and is difficult to detect\, wavelength-shifting materials are typ ically used to convert VUV light to visible wavelengths more easily detect able by conventional means. Here we present recent measurements of the wav elength-shifting and optical properties of poly(ethylene naphthalate) (PEN )\, a proposed alternative to tetraphenyl butadiene (TPB)\, the most widel y-used wavelength-shifter in argon-based experiments. The measurements wer e performed in a custom cryostat system with well-demonstrated geometric a nd response stability\, with 128~nm argon scintillation light used to exam ine various PEN-including reflective samples' light-producing capabilities \, as well as their stability. The best-performing PEN-including test refl ector was found to produce 34% as much visible light as a TPB-including re ference sample\, with widely varying levels of light production between di fferent PEN-including test reflectors.\n\nhttps://indico.physics.ucsd.edu/ event/1/contributions/7/ LOCATION: URL:https://indico.physics.ucsd.edu/event/1/contributions/7/ END:VEVENT END:VCALENDAR