BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Photon Detection System in the far detector module of the DUNE exp eriment DTSTART;VALUE=DATE-TIME:20230906T104000Z DTEND;VALUE=DATE-TIME:20230906T110000Z DTSTAMP;VALUE=DATE-TIME:20260714T132700Z UID:indico-contribution-519-3287@indico.tlabs.ac.za DESCRIPTION:Speakers: Francesco Di Capua (Università di Napoli "Federico II")\nThe Deep Underground Neutrino Experiment (DUNE) is a long baseline n eutrino experiment for neutrino science and Beyond the Standard Model phys ics\, aiming to resolve the neutrino mass hierarchy and measure CP-violati on phase. DUNE will also have sensitivity to detect neutrinos from superno vae.\nThe experiment will make use of four far detector (FD) modules\, 130 0 km away from the beam line\, installed 1.5 km deep underground. The FD m odules will consist of Liquid Argon Time Projection Chambers with 17 kt of liquid argon each\, the largest ever attempted.\nPhoton detection systems (PDS) are integrated in the liquid-argon neutrino detectors and are used to provide the timing information for an event\, which is necessary for re constructing the drift coordinates of ionizing particle tracks and can be effectively used for other purposes including triggering events\, backgrou nd rejection\, and calorimetric energy estimation.\nThe PDS of the first F D module consists of light collector modules placed in the inactive space between the innermost wire planes of the TPC anode. The light collectors\, the so-called X-ARAPUCAs\, consist of cells acting as light trap and capt uring wavelength-shifted photons inside boxes with highly reflective inter nal surfaces where they are guided to Silicon Photomultipliers by waveleng th-shifting bars.\nThe first FD module will use X-ARAPUCAs based rectangul ar Photon Detection unit (Supercell) having dimensions 209×12×2 cm3. The 48 SiPMs on each X-ARAPUCA supercell are ganged together\, and the signal s are collected by FE electronics\, mounted on the supercell. The second F D module will be equipped with Vertical Drift system\, in which charge is drifted vertically toward the charge readout planes. In this case\, a new design for X-ARAPUCA\, called Megacell has been implemented in which the d etector has square dimensions 600×600×8 mm3. In the present work the res ults in term of photon detection efficiency performances for X-ARAPUCA Sup ercell design and the test ongoing for the X-ARAPUCA Vertical Drift module s are reported.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/3287 / LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/3287/ END:VEVENT BEGIN:VEVENT SUMMARY:Light Detection System for the DUNE Near Detector DTSTART;VALUE=DATE-TIME:20230906T102000Z DTEND;VALUE=DATE-TIME:20230906T104000Z DTSTAMP;VALUE=DATE-TIME:20260714T132700Z UID:indico-contribution-519-2782@indico.tlabs.ac.za DESCRIPTION:Speakers: Alexandr Selyunin (Joint Institute for Nuclear Resea rch)\nThe Deep Underground Neutrino Experiment (DUNE) is an international long-baseline accelerator neutrino experiment hosted in the US. DUNE is cu rrently under construction and will consist of two neutrino detectors: the Near Detector at Fermilab and the Far Detector in the Sanford Underground Research Facility\, 1300 km downstream of the beam source. The Near Detec tor (ND) will sample the beam near the source and\, like the Far Detector\ , will feature liquid argon (LAr) Time Projection Chamber (TPC) technology to resolve neutrino interactions in detail. These interactions produce sc intillation light in the TPC volume which is registered by the Light Detec tion System (LDS). The LDS provides fast light information with a good spa tial resolution that is essential to overcoming the high event pile-up exp ected in this TPC. It is based on dielectric light traps and a silicon pho tomultiplier readout. Two light detection approaches are employed in the N D-LAr TPC – ArCLight and Light Collection Module (LCM). Four prototypes of ND-LAr TPC were tested with cosmic rays at the University of Bern. The performance of the LDS is presented using the test results from the Bern d ata.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/2782/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2782/ END:VEVENT BEGIN:VEVENT SUMMARY:CRYO-PoF: Cryogenic power over fiber for fundamental and applied p hysics at Milano-Bicocca DTSTART;VALUE=DATE-TIME:20230906T100000Z DTEND;VALUE=DATE-TIME:20230906T102000Z DTSTAMP;VALUE=DATE-TIME:20260714T132700Z UID:indico-contribution-519-2779@indico.tlabs.ac.za DESCRIPTION:Speakers: Marta Torti (INFN Milano Bicocca)\nThe power over fi ber (PoF) technology delivers electrical power by sending laser light thro ugh an optical fiber to a photovoltaic power converter\, in order to power sensors or electrical devices. \nThis solution offers several advantages: removal of noise induced by power lines\, robustness in a hostile environ ment\, spark free operation when electric fields are present and no interf erence with electromagnetic fields.\nThis technology is at the basis of th e CRYO-PoF project: an R&D funded by the Italian Insitute for Nuclear Rese arch (INFN) in Milano-Bicocca (Italy).\nThis project is inspired by the ne eds of the DUNE Vertical Drift detector\, where the VUV light of liquid ar gon must be collected at the cathode\, i.e. on a surface whose voltage exc eeds 300 kV.\nWe aim to develop a cryogenic system\, which is solely based on optoelectronic devices and a single laser input line\, to power both t he Photon Detection devices and its electronic amplifier.\nIn this talk we will presents the results obtained during test campaign performed in Mila no- Bicocca with emphasis on performance and potential application in the field of applied physics.\n\nhttps://indico.tlabs.ac.za/event/112/contribu tions/2779/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2779/ END:VEVENT BEGIN:VEVENT SUMMARY:SoLAr detector small scale prototype DTSTART;VALUE=DATE-TIME:20230906T094000Z DTEND;VALUE=DATE-TIME:20230906T100000Z DTSTAMP;VALUE=DATE-TIME:20260714T132700Z UID:indico-contribution-519-2958@indico.tlabs.ac.za DESCRIPTION:Speakers: Saba Parsa (University of Bern)\nThe LArTPC technolo gy\, in the last decade has witnessed several novelties\, preparing the st age for the next generation of large scale long baseline neutrino experime nts such as DUNE.\nThe SoLAr detector concept aims to extend the sensitivi ties of such detectors to the MeV energy range\, and expands their physics reach to precision measurement of solar and supernovae neutrinos.\nThe co re concept is centered around an integrated charge-light readout plane\, c onsisting of pixel pads for charge collection and VUV SiPMs for direct det ection of LAr scintillation light. The main challenges are to achieve low energy thresholds with an excellent energy resolution and successfully per form background rejection using pulse shape discrimination.\nA staged prot otyping program is planned to demonstrate the technology viability of the detector concept step by step. In October 2022\, a small scale SoLAr proto type was constructed and tested in LAr at Bern University. Here we present the results from the first prototype run with cosmics muons and discuss t he roadmap to a ton scale demonstrator at Boulby Underground Laboratory.\n \nhttps://indico.tlabs.ac.za/event/112/contributions/2958/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2958/ END:VEVENT BEGIN:VEVENT SUMMARY:Innovative media for the purification of liquid argon from nitroge n contaminations DTSTART;VALUE=DATE-TIME:20230906T092000Z DTEND;VALUE=DATE-TIME:20230906T094000Z DTSTAMP;VALUE=DATE-TIME:20260714T132700Z UID:indico-contribution-519-3121@indico.tlabs.ac.za DESCRIPTION:Speakers: Ettore Segreto (Universidade Estadual de Campinas)\n Liquid argon (Large) is used as active media in several neutrino and dark matter experiments (DUNE\, SBND\, Microboone\, Icarus\, DarkSide\, DEAP\, …). Ionization particles in liquid argon produce free charges and scint illation photons. Both signals are used to perform calorimetric measuremen ts\, particle identification and three dimensional reconstruction. LAr sci ntillation light can be quenched and absorbed by the presence of nitrogen contaminations. In neutrino detectors electronegative contaminants\, like oxygen and water\, are continuously filtered\, while nitrogen is not. Thi s can lead to a reduction of the scintillation signal in case of air leaks in the detector. Dark matter experiments typically filter nitrogen in gas phase at room temperature.\nA new innovative media for the purification o f argon from nitrogen in liquid phase will be presented. \nThe innovative molecular sieve is the zeolites Li-FAU. Purification tests have been perf ormed using the Liquid Argon (LAr) Purification Cryostat (PuLArC) at IFGW/ Unicamp. Previous studies performed with nitrogen gas at T=89 K\, revealed a strong interaction of nitrogen with the lithium cations present in the zeolite LiX. The tests performed in PuLArC have unequivocally shown that t he Li-FAU adsorbent is capable of capturing N2 recirculating argon in liqu id phase. The Li-FAU was able to reduce a N2 contamination of 20-50 ppm ( part per million) to 0.1-1.0 ppm in 1-2 hours of circulation time. The tes t was repeated several times. These results invoke further investigations in larger scale LAr cryostats at Fermilab and CERN in order to support the possible use of Li-FAU molecular sieve\, in replacement of Molecular Siev e 4A\, in LBNF-DUNE and other LAr experiments.\n\nhttps://indico.tlabs.ac. za/event/112/contributions/3121/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/3121/ END:VEVENT BEGIN:VEVENT SUMMARY:Detector physics and event reconstruction at the MicroBooNE experi ment. DTSTART;VALUE=DATE-TIME:20230906T090000Z DTEND;VALUE=DATE-TIME:20230906T092000Z DTSTAMP;VALUE=DATE-TIME:20260714T132700Z UID:indico-contribution-519-3122@indico.tlabs.ac.za DESCRIPTION:Speakers: Patrick Green (University of Oxford)\nThe MicroBooNE experiment is a Liquid Argon Time Projection Chamber (LArTPC) placed on-a xis to the Booster Neutrino Beam (BNB) at Fermilab. MicroBooNE ran its phy sics and R&D runs from 2015 through 2021. Its primary physics goal is to c ontribute to addressing the elusive short-baseline MiniBooNE low energy ex cess. MicroBooNE records and utilizes both the ionization charge and scint illation light produced inside the TPC to select and reconstruct its event s. To properly address the physics goals\, it is crucial to properly under stand how the detector evolves over time and perform continuous calibratio ns. This means performing state of the art measurement of detector physics quantities such as electron lifetime\, diffusion\, as monitoring and cali brating the light yield. This talk will go over what MicroBooNE has learne d and measured throughout its nearly continuous 7 years of running regardi ng detector physics measurements. Analysis of MicroBooNE performance over time will be beneficial to the next many years long running Short-Baseline Neutrino (SBN) and DUNE programs to properly understand the important det ector physics measurements in LArTPCs. Finally\, we will present recent de velopments in LArTPC analysis that demonstrate O(ns) neutrino interaction timing and MeV-scale physics reach employing both charge and scintillatio n signatures.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/3122/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/3122/ END:VEVENT END:VCALENDAR