BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Segmented scintillator neutrino detector SuperFGD for T2K experi ment DTSTART;VALUE=DATE-TIME:20230905T090000Z DTEND;VALUE=DATE-TIME:20230905T092000Z DTSTAMP;VALUE=DATE-TIME:20260521T104639Z UID:indico-contribution-509-2791@indico.tlabs.ac.za DESCRIPTION:Speakers: Yury Kudenko ()\, Anna Dergacheva (INR)\nThe long b aseline T2K neutrino experiment in Japan obtained a first indication of CP violation in neutrino oscillations. To obtain better sensitivity\, T2K will accumulate more statistics with a higher intensity beam and the u pgraded near detector ND280 which allows us to reduce systematic uncertai nties in oscillation measurements. The upgraded detector will have the full polar angle coverage for muons produced in neutrino charged current interactions\, a low threshold for proton detection and will be able to measure neutrons using time-of-flight due to a good timing performance. Thanks to these new capabilities\, the energy spectra of muon neutrinos and antineutrinos will be measured with an unprecedented level of accura cy. A 3D highly granular scintillator detector called SuperFGD with a mass of about 2 tons is being constructed at J-PARC now. It consists of about two millions of small optically-isolated plastic scintillator cubes with a 1 cm side. Each cube is read out in the three orthogonal direction s with wave-length shifting (WLS) fibers coupled to micro pixel photon c ounters (MPPC). All cubes are assembled in a light protected box with abou t 60000 holes for WLS fibers. An LED calibration system with Light Guide Plates is used for calibration and control for WLS/MPPC readout. SuperFG D Front End Board electronics based on CITIROC chips is developed and tes ted. On-surface SuperFGD will be provided with cosmic muons and the ins tallation into the ND280 magnet is expected in September 2023 to take the neutrino beam in the Fall of 2023. In this talk\, the results of the te sts\, obtained parameters and current status of SuperFGD will be report ed. The unique features of SuperFGD physics program will be also describe d.\n\nhttps://indico.tlabs.ac.za/event/112/contributions/2791/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2791/ END:VEVENT BEGIN:VEVENT SUMMARY:The 3-inch PMT system and its progress at JUNO DTSTART;VALUE=DATE-TIME:20230905T104000Z DTEND;VALUE=DATE-TIME:20230905T110000Z DTSTAMP;VALUE=DATE-TIME:20260521T104639Z UID:indico-contribution-509-2996@indico.tlabs.ac.za DESCRIPTION:Speakers: Jilei Xu (IHEP\, China)\nAbout 25 thousand 3-inch PM Ts (SPMTs) were designed to install in JUNO detector between the gaps of a bout 18 thousand 20-inch PMTs (LPMTs) to enhance the detector performance\ , such as improving energy resolution and nonlinearity\, extend JUNO physi cs like supernova neutrino detection and so on. Currently\, all the parts of SPMT system\, such as SPMTs\, cables\, electronics and under water boxe s have already been mass produced and delivered to the JUNO site. They are being installed in the JUNO underground detector. The SPMT system and the installation progress will be presented in this talk.\n\nhttps://indico.t labs.ac.za/event/112/contributions/2996/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2996/ END:VEVENT BEGIN:VEVENT SUMMARY:The Water Cherenkov Detector of JUNO DTSTART;VALUE=DATE-TIME:20230905T094000Z DTEND;VALUE=DATE-TIME:20230905T100000Z DTSTAMP;VALUE=DATE-TIME:20260521T104639Z UID:indico-contribution-509-2971@indico.tlabs.ac.za DESCRIPTION:Speakers: Haoqi Lu (Institute of High Energy Physics)\nThe Jia ngmen Underground Neutrino Observatory (JUNO) is a large liquid scintillat or detector being built for neutrino detection. The detector will be built in a laboratory at 700-m underground for cosmic muon-induced background r eduction. The 20 kton of liquid scintillator target is in an acrylic spher e surrounded by 17612 20-inch large PMTs that compose the central detector . A 34 kton ultrapure water pool surrounds the central detector\, and 2400 20-inch PMT is installed as a Water Cherenkov detector for cosmic muon de tection and background reduction. On top of the water pool was a top track er detector for muon tracking for Li9/He8 background study. The water pool ’s wall inner surface and the stainless steel's outer surface are covere d with Tyvek reflectors to increase light collection efficiency. A water s ystem is used for water purification and circulation to maintain high wate r quality for better detector performance. A set of radon removal equipmen t will be integrated with the water system to reduce the radon-induced bac kground in water\, with anticipation of radon concentration in water reduc ed to 10mBq/m^3.The main goal of JUNO is for neutrino mass ordering determ ination\; it is also a multi-purpose experiment\, such as supernova neutri no\, atmospheric neutrino\, solar neutrino\, and nuclear decay\, being als o detected in addition to reactor neutrino detection. The cosmic muon dete ction efficiency of the water Cherenkov detector is >99%\, and the cosmic muon-induced fast neutron background can also be controlled to ~0.1/day le vel. This presentation will cover the design and status of the Water Chere nkov detector of JUNO.\n\nhttps://indico.tlabs.ac.za/event/112/contributio ns/2971/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2971/ END:VEVENT BEGIN:VEVENT SUMMARY:The R&D of the MCP based PMTs for High Energy Physics Detectors DTSTART;VALUE=DATE-TIME:20230905T092000Z DTEND;VALUE=DATE-TIME:20230905T094000Z DTSTAMP;VALUE=DATE-TIME:20260521T104639Z UID:indico-contribution-509-2771@indico.tlabs.ac.za DESCRIPTION:Speakers: sen Qian (IHEP\,CAS)\nThe Micro-Channel Plate (MCP) is a specially crafted microporous plate with millions of independent chan nels\, which have secondary electron emission capability. The MCP could be used as the electronic multiplier amplifier in the PMTs. There are two ty pes of MCP Photomultiplier tube (MCP-PMT)\, large-area electrostatic focus ing PMTs (LPMT) and small size proximity focusing PMTs (FPMT) respectively . The LPMT always used in the large scalar neutrino detector for it’s la rge area efficiency photocathode. The small size FPMT is widely used in hi gh energy physics for its fast time response\, strong anti-interference ab ility. The MCP-PMT Collaboration Group in China has successfully research and developed the LPMT for JUNO in 2017\, and plan to research a new type of FPMT with multi-anode readout (4X4\, 8X8). The FPMT prototypes have bee n produced with 50 ps time resolution\, and also the 8X8 readout anode for the position resolution. We will introduce some design of the FPMTs for t he time measurement\, and the performance of the several different prototy pes with different readout channels.\n\nhttps://indico.tlabs.ac.za/event/1 12/contributions/2771/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2771/ END:VEVENT BEGIN:VEVENT SUMMARY:Production line and quality assurance of mPMT photosensors for WCT E. DTSTART;VALUE=DATE-TIME:20230905T100000Z DTEND;VALUE=DATE-TIME:20230905T102000Z DTSTAMP;VALUE=DATE-TIME:20260521T104639Z UID:indico-contribution-509-2953@indico.tlabs.ac.za DESCRIPTION:Speakers: Krzysztof Dygnarowicz (Warsaw University of Technolo gy)\nThe Water Cherenkov Test Experiment (WCTE) is a CERN experiment that aims to test several technologies and techniques related to water Cherenko v detectors. It will consist of approximately 120 multi-PMT photosensors p laced in a water tank (~3.8 m diameter\, ~3.6 m height\, total water mass ~41 tonnes). Each multi-PMT consists of nineteen 3” PMTs and the associa ted front-end electronics enclosed in a water-tight pressure vessel. A sim ilar system will be used in the Intermediate Water Cherenkov Detector (IWC D) and\, with some modifications\, in the far detector of the Hyper-Kamiok ande experiment.\n\nThis talk briefly covers the production process of the multi-PMT system along with the adopted procedures for the assembly and q uality assurance control and tools. Also\, we will present the methods use d to evaluate the performance of the electronics and optical parameters of the multi-PMTs. Finally\, the quality assurance data collected from a sam ple module will be discussed.\n\nhttps://indico.tlabs.ac.za/event/112/cont ributions/2953/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2953/ END:VEVENT BEGIN:VEVENT SUMMARY:Development of wavelength-shifting plate light collector for Out er Detector of Hyper-Kamiokande DTSTART;VALUE=DATE-TIME:20230905T102000Z DTEND;VALUE=DATE-TIME:20230905T104000Z DTSTAMP;VALUE=DATE-TIME:20260521T104639Z UID:indico-contribution-509-2814@indico.tlabs.ac.za DESCRIPTION:Speakers: Alexander Izmaylov (INR\, Moscow)\, Yury Kudenko ()\ nHyper-Kamiokande (HK) is a next generation underground water Cherenkov de tector to be built in Japan for neutrino oscillation studies\, proton dec ay searches\, and neutrino astrophysics. An Outer Detector (OD) will prov ide information to identify interactions originating from particles outsi de the inner detector of HK and to veto background events. The baseline c onfiguration of OD includes a few thousand photosensitive units. Each unit consists of a 3-inch PMT with a wavelength shifting (WLS) plate mounted a round it to collect Cherenkov light\, reemit it and concentrate on the P MT. The plates doped with different fluors were tested in air and water using a set of UV LED light sources with different wavelengths. The photon detection efficiency of wavelength shifting fluors\, side reflectors\, o ptical coupling between a PMT and a plate were studied. Presented results include comparative performance of WLS plates\, absolute photodetection efficiencies\, parameters of attenuation and light collection efficiency\, optimization of chemical composition of WLS dopants.\n\nhttps://indico.tl abs.ac.za/event/112/contributions/2814/ LOCATION: Meeting Room 2.41 - 2.43 URL:https://indico.tlabs.ac.za/event/112/contributions/2814/ END:VEVENT END:VCALENDAR