BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:The PDU test facility for the Darkside20k experiment. DTSTART;VALUE=DATE-TIME:20241218T143000Z DTEND;VALUE=DATE-TIME:20241218T145000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1388@cern.ch DESCRIPTION:Speakers: Yury Suvorov (UNINA / INFN Sez. Napoli)\nThe DarkSid e-20k is a 20-tonne fiducial mass dual phase Liquid Argon Time Projection Chamber (LArTPC) detector for the direct dark matter search\, filled with low radioactivity Argon and equipped with customised cryogenic SiPM phot osensors. The experiment will be constructed in INFN Gran Sasso undergroun d Laboratory (LNGS)\, and is expected to be free of any instrumental backg round for an exposure of >100 tonne year.\nThe DarkSide SiPMs were develop ed specifically for LAr use in collaboration with Fondazione Bruno Kessler (FBK). This activity leaded to the production and assembly of large surfa ce arrays of SiPMs (20×20 cm2) the Photo Detection Units (PDU) in a INFN dedicated production site NOA at LNGS. The total of 528 PDUs will be prod uced in the following year to be allocated on the two Optical Planes (OP) of the TPC (with ~21 m2 total SiPM surface).\nAll PDUs before installatio n on the OP must be tested and qualified in LN\, this will done in a dedic ated test facility (PDU Test Facility) designed\, assembled and commission ed in Naples Cryogenic Laboratory for the Dark Matter Direct Searches of U NINA Physics Department.\nTwo one-month long testing campaigns with very f irst 6 and later 10 PDUs were conducted in Naples in May and October of 20 24. The PDUs were tested for varying over-voltage values and different rea dout and power configurations. The key parameters like SPE position\, Base line RMS\, signal-to-noise ratio\, Gain and Sensitivity as a function of time were acquired for the stability study. The description of tests and r esults will be presented in this talk.\n\nhttps://indico.unina.it/event/86 /contributions/1388/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1388/ END:VEVENT BEGIN:VEVENT SUMMARY:First data from the prototype of DarkSide-20k in Napoli DTSTART;VALUE=DATE-TIME:20241218T145000Z DTEND;VALUE=DATE-TIME:20241218T151000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1405@cern.ch DESCRIPTION:Speakers: Dmitrii Rudik (UNINA)\nDarkSide-Proto0 (Proto0) is a n experiment developed within the DarkSide-20k project\, a dark matter dir ect detection experiment that aims to hunt for WIMPs using a two-phase arg on time projection chamber (TPC). In preparation for the future DS-20k exp eriment\, Proto0 focuses on investigating and optimizing the production of the ionization signal (S2) in two-phase argon TPCs and validating many of the novel technologies featured in the DS-20k detector on a smaller scale . To achieve this\, Proto0 is equipped with a compact TPC designed to acco mmodate two PDUs\, the 20x20 cm² SiPM-based photon counters developed for DS-20k. The main feature of the Proto0 detector is its flexible TPC desig n\, with independently moving components during operation. This enables an optimization study of S2 formation in relation to geometrical factors and electrical properties. The results obtained from Proto0’s scientific pr ogram will help fine-tune the DS-20k TPC design and contribute to a broade r understanding of the engineering behind future two-phase experiments. Th e experiment is currently located at the cryogenic laboratory of Unina/INF N Napoli\, where it is collecting data using a specially designed cryogeni c setup\, complete with argon condensation\, recirculation\, and purificat ion loops.\n\nhttps://indico.unina.it/event/86/contributions/1405/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1405/ END:VEVENT BEGIN:VEVENT SUMMARY:AGN variability studies in Naples: toward next generation surveys DTSTART;VALUE=DATE-TIME:20241218T105000Z DTEND;VALUE=DATE-TIME:20241218T111000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1404@cern.ch DESCRIPTION:Speakers: Maurizio Paolillo (Università di Napoli Federico II )\nI will describe the activity aimed at characterising AGN through their variability in preparation for next generation LSST surveys.\n\nhttps://in dico.unina.it/event/86/contributions/1404/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1404/ END:VEVENT BEGIN:VEVENT SUMMARY:Superconducting Nanowires as Targets for Sub-GeV Dark Matter DTSTART;VALUE=DATE-TIME:20241218T141000Z DTEND;VALUE=DATE-TIME:20241218T143000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1389@cern.ch DESCRIPTION:Speakers: Roberta Calabrese ()\nSuperconducting nanowires repr esent a rapidly developing technology with a broad spectrum of application s in fields such as space communications\, lidar\, and quantum information science. This talk explores the potential of using superconducting nanowi res both as targets and sensors for the direct detection of sub-GeV dark m atter.\nThese devices offer exceptional sensitivity to small energy deposi ts in electrons and demonstrate remarkably low dark count rates\, making t hem ideal for probing electron recoils resulting from dark matter scatteri ng and absorption interactions. We present sensitivity plots for a 4.2 ng NbN device with a dark count rate of $5\\times10^{-4}s^{-1}$ dark count ra te and discuss the projected sensitivities for larger detectors.\n\nhttps: //indico.unina.it/event/86/contributions/1389/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1389/ END:VEVENT BEGIN:VEVENT SUMMARY:Does gravity act on the quantum vacuum? The ARCHIMEDES experiment. DTSTART;VALUE=DATE-TIME:20241218T135000Z DTEND;VALUE=DATE-TIME:20241218T141000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1387@cern.ch DESCRIPTION:Speakers: LUCIANO ERRICO (Università di Napoli "Federico II" - INFN Sezione di Napoli)\nNel paradigma della Relatività Generale\, l'at trazione gravitazionale è un fenomeno geometrico dello spaziotempo avvert ito tanto dai corpi massivi che dai campi puramente energetici\, come il c ampo elettromagnetico. In quest'ottica\, anche il concetto di peso cambia\ , perchè non dipende solo dalla quantità di materia ma anche dall'energi a interna. Trattandosi di una teoria classica\, si ritiene plausibile l'ef fetto di attrazione sui campi classici\, ma non è ovvio immaginare questo fenomeno sui campi quantistici\, a causa delle divergenze nel calcolo del l'energia di vuoto. \nL'esperimento ARCHIMEDES (INFN - CSN2) si propone di misurare la variazione di peso di un cristallo superconduttivo di BSCCO m entre viene indotta una variazione di energia di vuoto interna dalla trans izione di fase. La variazione di peso attesa è così piccola (0.5 fN) che è stato necessario costruire *ad hoc* una bilancia opto-meccanica di alt a precisione operante presso il futuro SUN Laboratory (Lula\, NU)\, essend o la Sardegna uno dei luoghi con rumore sismico più basso d'Europa. \n\nI n the paradigm of General Relativity (GR)\, gravitational attraction is a geometric phenomenon of spacetime felt by both massive bodies and massless fields\, such as the electromagnetic field. In this context\, the concept of weight also changes\, because it depends not only on the amount of mat ter but also on internal energy. Since GR is a classical theory\, the effe ct of attraction on classical fields is considered plausible\, but it is n ot obvious to imagine this phenomenon on quantum fields\, due to divergenc es in the calculation of vacuum energy. The ARCHIMEDES experiment (INFN - CSN2) aims to measure the weight change of a superconducting BSCCO crystal while an internal vacuum energy variation is induced by the phase transit ion. The expected weight variation is so small (0.5 fN) that a high-precis ion opto-mechanical balance had to be built *ad hoc* at the future SUN Lab oratory (Lula\, NU)\, Sardinia being one of the places with the lowest sei smic noise in Europe.\n\nhttps://indico.unina.it/event/86/contributions/13 87/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1387/ END:VEVENT BEGIN:VEVENT SUMMARY:Learning Universe with Artificial Intelligence DTSTART;VALUE=DATE-TIME:20241218T133000Z DTEND;VALUE=DATE-TIME:20241218T135000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1385@cern.ch DESCRIPTION:Speakers: Nicola R. Napolitano (UniNA )\nI will present a proj ect collecting machine learning tools to extract physical parameters from the major sky surveys and predict the cosmological parameters using millio n to billion galaxy samples.\n\nhttps://indico.unina.it/event/86/contribut ions/1385/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1385/ END:VEVENT BEGIN:VEVENT SUMMARY:Searching for TeV-emitting candidates among the X-ray bright blaza r population DTSTART;VALUE=DATE-TIME:20241218T111000Z DTEND;VALUE=DATE-TIME:20241218T113000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1384@cern.ch DESCRIPTION:Speakers: ANTONIO IULIANO (INFN Sezione di Napoli)\nThe purpos e of this work is to understand if\, among the blazars not detected by Fer mi-LAT\, a population of TeV emitting sources could be detected by current or future Cherenkov telescopes. We cross-matched the 5BZCAT catalog of bl azars with the most recent catalogs of point-like source\, to determine i f the X-ray emission can be used as an effective proxy to find and charact erize candidate TeV-emitting blazars.\n\nhttps://indico.unina.it/event/86/ contributions/1384/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1384/ END:VEVENT BEGIN:VEVENT SUMMARY:(No) exotic monsters in the early Universe DTSTART;VALUE=DATE-TIME:20241218T115000Z DTEND;VALUE=DATE-TIME:20241218T121000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1386@cern.ch DESCRIPTION:Speakers: FABIO IOCCO (Università di Napoli "Federico II")\nT he recent data by the JWST satellite identify what seems an excess of lumi nous objects in the early Universe. It has been proposed that this may be evidence that exotic monsters lurk in the cosmic Dark Ages.\nI will show h ow -while such excesses seems to be consistent and real- they can not be e xplained by some of the most extreme versions of "dark matter supported st ellar objects" that myself and others postulated in the past\, contrary to the claims in this sense.\n\nhttps://indico.unina.it/event/86/contributio ns/1386/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1386/ END:VEVENT BEGIN:VEVENT SUMMARY:JWST and the high redshift Universe DTSTART;VALUE=DATE-TIME:20241218T113000Z DTEND;VALUE=DATE-TIME:20241218T115000Z DTSTAMP;VALUE=DATE-TIME:20261017T064418Z UID:indico-contribution-263-1383@cern.ch DESCRIPTION:Speakers: Marianna Annunziatella ()\nI will talk about the rec ent discoveries on high redshift galaxies made by JWST in the last year\, and what we can expect from the next rounds of observations.\n\nhttps://in dico.unina.it/event/86/contributions/1383/ LOCATION:Dipartimento di Fisica "Ettore Pancini" Aula Caianiello URL:https://indico.unina.it/event/86/contributions/1383/ END:VEVENT END:VCALENDAR