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arXiv 2025年

作者： Peille, Philippe barret, Didier Cucchetti, edoardo Albouys, Vincent Piro, Luigi Simionescu, Aurora Cappi, Massimo bellouard, elise Cénac-Morthé, Céline Daniel, Christophe Pradines, Alice Finoguenov, Alexis Kelley, Richard Mas-Hesse, J. Miguel Paltani, Stéphane Rauw, Gregor Rozanska, Agata Svoboda, Jiri Wilms, Joern Audard, Marc bozzo, enrico Costantini, elisa Dadina, Mauro Dauser, Thomas Decourchelle, Anne den Herder, Jan-Willem Goldwurm, Andrea Jonker, Peter Markowitz, Alex Mendez, Mariano Miniutti, Giovanni Molendi, Silvano Nicastro, Fabrizio Pajot, François Pointecouteau, etienne Pratt, Gabriel W. Schaye, Joop Vink, Jacco Webb, Natalie bandler, Simon barbera, Marco Ceballos, Maria Teresa Charles, Ivan den Hartog, Roland Doriese, W. bertrand Duval, Jean-Marc Gatti, Flavio Jackson, brian Kilbourne, Caroline Macculi, Claudio Martin, Sylvain Parot, Yann Porter, Frederick Prêle, Damien Ravera, Laurent Smith, Stephen Soucek, Jan Thibert, Tanguy Tuominen, eija Acero, Fabio ettori, Stefano Grosso, Nicolas Kaastra, Jelle Mazzotta, Pasquale Miller, Jon Sciortino, Salvatore beaumont, Sophie D’Andrea, Matteo de Plaa, Jelle eckart, Megan Gottardi, Luciano Leutenegger, Maurice Lotti, Simone Molin, Alexei Natalucci, Lorenzo Adil, Muhammad Qazi Argan, Andrea Cavazzuti, elisabetta Fiorini, Mauro Khosropanah, Pourya Villegas, eduardo Medinaceli Minervini, Gabriele Perry, James Pinsard, Frederic Raulin, Desi Rigano, Manuela Roelfsema, Peter Schwander, Denis Terron, Santiago Torrioli, Guido Ullom, Joel Zuchniak, Monika Chaoul, Laurence Torrejon, Jose Miguel brachet, Frank Cobo, beatriz Durkin, Malcolm Fioretti, Valentina Geoffray, Hervé Jacques, Lionel Kirsch, Christian Cicero, Ugo Lo Adams, Joseph Gloaguen, emilie Gonzalez, Manuel Hull, Samuel Jellyman, erik Kiviranta, Mikko Sakai, Kazuhiro Taralli, emanuele Vaccaro, Davide van der Hulst, Paul van der Kuur, Jan van Leeuwen, bert-Joost van Loon, Dennis Wakeham, Nicholas Auricchio, Natalia brienza, Daniele Cheatom, Oscar Franssen, Philippe Julien, Sabine Le Mer, Isabelle Moirin, D Centre National d’Etudes Spatiales Centre spatial de Toulouse 18 avenue Edouard Belin Toulouse31401 Cedex 9 France Institut de Recherche en Astrophysique et Planétologie Université de Toulouse CNRS UPS CNES 9 Avenue du Colonel Roche BP 44346 ToulouseF-31028 Cedex 4 France INAF Istituto di Astrofisica e Planetologia Spaziali Via Fosso del Cavaliere 100 Roma00133 Italy SRON Netherlands Institute for Space Research Niels Bohrweg 4 CA Leiden2333 Netherlands INAF Osservatorio di Astrofisica e Scienza dello Spazio via Gobetti 93/3 Bologna40129 Italy FI-00014 Finland NASA Goddard Space Flight Center 8800 Greenbelt Rd GreenbeltMD20771 United States CSIC-INTA Villanueva de la Cañada Madrid28692 Spain Département d’Astronomie Université de Genève Chemin d’Ecogia 16 VersoixCH-1290 Switzerland Université de Liège Institut d’Astrophysique et de Géophysique Quartier Agora Allée du 6 Août 19c LiègeB-4000 Belgium Centrum Astronomiczne im. Mikolaja Kopernika Polskiej Akademii Nauk ul. Bartycka 18 Warszawa00-716 Poland Astronomical Institute Czech Academy of Sciences Bocni II 1401/1 Praha 4CZ-14100 Czech Republic Remeis-Observatory and ECAP FAU Erlangen-Nürnberg Sternwartstr. 7 Bamberg96049 Germany Université Paris-Saclay Université Paris Cité CEA CNRS AIM Gif-sur-Yvette91191 France ParisF-75013 France Rijksuniversiteit Groningen Faculty of Science and Engineering Landleven 12 Groningen9747 AD Netherlands INAF IASF Milano Via Alfonso Corti 12 MilanoI-20133 Italy INAF Osservatorio Astronomico di Roma Via Frascati 33 Monte Porzio Catone Rome00040 Italy Leiden Observatory Leiden University PO Box 9513 LeidenNL-2300 RA Netherlands Anton Pannekoek Institute GRAPPA University of Amsterdam PO Box 94249 Amsterdam1090 GE Netherlands Università degli Studi di Palermo Dipartimento di Fisica e Chimica Via Archirafi 36 Palermo90123 Italy Edificio Juan Jordá Avenida de los Castros s/n Cantabria SantanderE-39005 Spain Univ. G

The Athena mission entered a redefinition phase in July 2022, driven by the imperative to reduce the mission cost at completion for the european Space Agency below an acceptab.e target, while maintaining the flagship nature of its science return. This notably called for a complete redesign of the X-ray Integral Field Unit (X-IFU) cryogenic architecture towards a simpler active cooling chain. Passive cooling via successive radiative panels at spacecraft level is now used to provide a 50 K thermal environment to an X-IFU owned cryostat. 4.5 K cooling is achieved via a single remote active cryocooler unit, while a multi-stage Adiabatic Demagnetization Refrigerator ensures heat lift down to the 50 mK required by the detectors. Amidst these changes, the core concept of the readout chain remains robust, employing Transition edge Sensor microcalorimeters and a SQUID-based Time-Division Multiplexing scheme. Noteworthy is the introduction of a slower pixel. This enab.es an increase in the multiplexing factor (from 34 to 48) without compromising the instrument energy resolution, hence keeping significant system margins to the new 4 eV resolution requirement. This allows reducing the number of channels by more than a factor two, and thus the resource demands on the system, while keeping a 4’ field of view (compared to 5’ before). In this article, we will give an overview of this new architecture, before detailing its anticipated performances. Finally, we will present the new X-IFU schedule, with its short term focus on demonstration activities towards a mission adoption in early 2027. Copyright © 2025, The Authors. All rights reserved.

关键词： Chains

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IoT based Low-cost Weather Station and Monitoring System for Precision Agriculture in India

IoT Based Low-cost Weather Station and Monitoring System for...

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International Conference on I-SMAC (IoT in Social, Mobile, Analytics and Cloud) (I-SMAC)

作者： Rajinder Kumar M. Math Nagaraj V. Dharwadkar Department of ECE B.L.D.E. A’S College of Engineering and Technology Vijayapur Karnataka state India Department of Computer Science and Engineering Rajarambapu Institute of Technology Islampur Maharashtra state India

ISBN: (纸本)9781538614433;9781538614426

In recent times it is seen that the climatic and weather conditions not only in India but also in other countries have become uncertain and unpredictab.e, which may have devastating effects on the agriculture production. India being an agricultural country, most of the farmers largely rely on monsoons and agricultural production is weather dependent. The environmental factors like temperature, humidity, moisture, precipitation and many other parameters keep on changing rapidly and unpredictably. This unpredictab.e nature, variability of climatic or weather conditions makes the life of farmers quite miserab.e as they are unab.e to take proper decisions at the right time. Thus, it is the need of the hour to have a real-time, local weather station which would keep the farmers informed well in advance about the prevailing weather conditions so that they can take appropriate decisions at the right time and save their crops from loss. Precision Agriculture (PA) is an art of using the latest availab.e technologies in the agriculture domain so as to make traditional agriculture more profitab.e and sustainab.e while reducing the wastage of resources. The penetration of internet into India is very deep and very fast, especially due to the Jio mania by Reliance Jio Infocomm Limited last year, high speed internet is now possib.e even in rural areas. This paper proposes a IoT based real-time local weather station for PA, that would provide farmers a means of automizing their agricultural practices (irrigation, fertilization, harvesting) at the right time. The proposed system would also aid the farmers to carry out the agricultural tasks on real-time bases, which in turn helps them to use the agricultural resources in efficient way and at the time when needed by the crops. The proposed weather system is a small step towards the development of PA system considering the Indian scenarios.

关键词： Meteorology Agriculture Temperature sensors Temperature measurement Internet of Things Monitoring

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First neutrino oscillation measurement in KM3NeT/ORCA 37

First neutrino oscillation measurement in KM3NeT/ORCA

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37th International Cosmic Ray Conference, ICRC 2021

作者： Nauta, Lodewijk Pestel, Valentin Mańczak, Jerzy Stavropoulos, Dimitris Carretero, Victor Chau, Nhan Aly, Zineb de Jong, Paul Ageron, M. Aiello, S. Albert, A. Alshamsi, M. Alves Garre, S. Aly, Z. Ambrosone, A. Ameli, F. Andre, M. Androulakis, G. Anghinolfi, M. Anguita, M. Anton, G. Ardid, M. Ardid, S. Assal, W. Aublin, J. bagatelas, C. baret, b. du Pree, S. basegmez bendahman, M. benfenati, F. berb.e, e. van den berg, A.M. bertin, V. beurthey, S. van beveren, V. biagi, S. billault, M. bissinger, M. b.ettcher, M. bou Cabo, M. boumaaza, J. bouta, M. boutonnet, C. bouvet, G. bouwhuis, M. bozza, C. brânzaş, H. bruijn, R. brunner, J. bruno, R. buis, e. buompane, R. busto, J. Caiffi, b. Caillat, L. Calvo, D. Campion, S. Capone, A. Carduner, H. Carretero, V. Castaldi, P. Celli, S. Cereseto, R. Chabab, M. Champion, C. Chau, N. Chen, A. Cherubini, S. Chiarella, V. Chiarusi, T. Circella, M. Cocimano, R. Coelho, J.A.b. Coleiro, A. Colomer Molla, M. Colonges, S. Coniglione, R. Cosquer, A. Coyle, P. Cresta, M. Creusot, A. Cruz, A. Cuttone, G. D’Amico, A. Dallier, R. De Martino, b. De Palma, M. Di Palma, I. Díaz, A.F. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Dörr, M. Drouhin, D. eberl, T. eddyamoui, A. van eeden, T. van eijk, D. el bojaddaini, I. eljarrari, H. elsaesser, D. enzenhöfer, A. espinosa, V. Fermani, P. Ferrara, G. Filipović, M.D. Filippini, F. Fransen, J. Fusco, L.A. Gajanana, D. Gal, T. García Méndez, J. Garcia Soto, A. Garçon, e. Garufi, F. Gatius, C. Geißelb.echt, N. Gialanella, L. Giorgio, e. Gozzini, S.R. Gracia, R. Graf, K. Grella, G. Guderian, D. Guidi, C. Guillon, b. Gutiérrez, M. Haefner, J. Hallmann, S. Hamdaoui, H. van Haren, H. Heijb.er, A. Hekalo, A. Hennig, L. Henry, S. Hernández-Rey, J.J. Hofestädt, J. Huang, F. Idrissi Ibnsalih, W. Ilioni, A. Illuminati, G. James, C.W. Janezashvili, D. Jansweijer, P. de Jong, M. de Jong, P. Jung, b.J. Kadler, M. Kalaczyński, P. Kalekin, O. Nikhef Science Park 105 Amsterdam1098XG Netherlands IFIC - Instituto de Física Corpuscular CSIC - Universitat de València c/Catedrático José Beltrán 2 Paterna Valencia46980 Spain NCSR Demokritos Institute of Nuclear and Particle Physics Ag. Paraskevi Attikis Athens15310 Greece Université de Paris CNRS Astroparticule et Cosmologie ParisF-75013 France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France Universiteit van Amsterdam Institute of Physics Science Park 904 Amsterdam1098XH Netherlands INFN Sezione di Catania Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Dipartimento di Fisica INFN Sezione di Padova Università di Padova PadovaI-35131 Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d’Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy University of Granada Dept. of Computer Architecture and Technology CITIC Granada18071 Spain Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Centre for Astroparticle Physics Erwin-Rommel-Straße 1 Erlangen91058 Germany Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/Paranimf 1 Gandia46730 Spain Nikhef National Institute for Subatomic Physics PO Box 41882 Amsterdam1009 DB Netherlands University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco INFN Sezione di Bologna v.le C. Berti-Pichat 6/2 Bologna40127 Italy Università di Bologna Dipartimento di Fisica e As

The KM3NeT/ORCA is a next-generation neutrino detector currently under construction in the Mediterranean Sea. There are currently 6 Detection Units deployed, and in the past year the detector has b.en steadily taking data. Here the first neutrino oscillation measurement is presented using data taken with the ORCA detector 6 Detection Units, containing 354.6 days of exposure. Selection criteria are discussed, followed by a neutrino oscillation analysis. In the analysis it is found that oscillations are preferred with a confidence level of 5.9 σ over "no oscillations". Likelihood scans of the Δm312 and sin2 θ23 parameter also show a strong exclusion of the no oscillation hypothesis. The sensitivity contour in (sin2 θ23, Δm312) is presented, showing results that are approaching to being being competitive with other experiments [1]. © Copyright owned by the author(s).

关键词： Neutrons

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Sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA 37

Sensitivity estimates for diffuse, point-like and extended n...

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37th International Cosmic Ray Conference, ICRC 2021

作者： Caiffi, b. Garcia Soto, A. Heijb.er, A. Kulikovskiy, V. Muller, R.S. Sanguineti, M. Ageron, M. Aiello, S. Albert, A. Alshamsi, M. Alves Garre, S. Aly, Z. Ambrosone, A. Ameli, F. Andre, M. Androulakis, G. Anghinolfi, M. Anguita, M. Anton, G. Ardid, M. Ardid, S. Assal, W. Aublin, J. bagatelas, C. baret, b. basegmez du Pree, S. bendahman, M. benfenati, F. berb.e, e. van den berg, A.M. bertin, V. beurthey, S. van beveren, V. biagi, S. billault, M. bissinger, M. b.ettcher, M. bou Cabo, M. boumaaza, J. bouta, M. boutonnet, C. bouvet, G. bouwhuis, M. bozza, C. brânzaş, H. bruijn, R. brunner, J. bruno, R. buis, e. buompane, R. busto, J. Caiffi, b. Caillat, L. Calvo, D. Campion, S. Capone, A. Carduner, H. Carretero, V. Castaldi, P. Celli, S. Cereseto, R. Chabab, M. Champion, C. Chau, N. Chen, A. Cherubini, S. Chiarella, V. Chiarusi, T. Circella, M. Cocimano, R. Coelho, J.A.b. Coleiro, A. Colomer Molla, M. Colonges, S. Coniglione, R. Cosquer, A. Coyle, P. Cresta, M. Creusot, A. Cruz, A. Cuttone, G. D’Amico, A. Dallier, R. De Martino, b. De Palma, M. Di Palma, I. Díaz, A.F. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Dörr, M. Drouhin, D. eberl, T. eddyamoui, A. van eeden, T. van eijk, D. el bojaddaini, I. eljarrari, H. elsaesser, D. enzenhöfer, A. espinosa, V. Fermani, P. Ferrara, G. Filipović, M.D. Filippini, F. Fransen, J. Fusco, L.A. Gajanana, D. Gal, T. García Méndez, J. Garcia Soto, A. Garçon, e. Garufi, F. Gatius, C. Geißelb.echt, N. Gialanella, L. Giorgio, e. Gozzini, S.R. Gracia, R. Graf, K. Grella, G. Guderian, D. Guidi, C. Guillon, b. Gutiérrez, M. Haefner, J. Hallmann, S. Hamdaoui, H. van Haren, H. Heijb.er, A. Hekalo, A. Hennig, L. Henry, S. Hernández-Rey, J.J. Hofestädt, J. Huang, F. Idrissi Ibnsalih, W. Ilioni, A. Illuminati, G. James, C.W. Janezashvili, D. Jansweijer, P. de Jong, M. de Jong, P. Jung, b.J. Kadler, M. Kalaczyński, P. INFN - Sezione di Genova Via Dodecaneso 33 Genova16146 Italy Nikhef Science Park 105 Amsterdam1098 XG Netherlands University of Amsterdam Science Park 904 Amsterdam1098 XH Netherlands Dipartimento di Fisica dell’Università Via Dodecaneso 33 Genova16146 Italy Aix Marseille Univ CNRS IN2P3 CPPM Marseille France INFN Sezione di Catania Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Université de Paris CNRS Astroparticule et Cosmologie ParisF-75013 France IFIC - Instituto de Física Corpuscular CSIC - Universitat de València c/Catedrático José Beltrán 2 Paterna Valencia46980 Spain INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d’Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain NCSR Demokritos Institute of Nuclear and Particle Physics Ag. Paraskevi Attikis Athens15310 Greece INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy University of Granada Dept. of Computer Architecture and Technology CITIC Granada18071 Spain Friedrich-Alexander-Universität Erlangen-Nürnberg Erlangen Centre for Astroparticle Physics Erwin-Rommel-Straße 1 Erlangen91058 Germany Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/Paranimf 1 Gandia46730 Spain Nikhef National Institute for Subatomic Physics PO Box 41882 Amsterdam1009 DB Netherlands University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco INFN Sezione di Bologna v.le C. Berti-Pichat 6/2 Bologna40127 Italy Dipartimento di Fisi

The identification of cosmic ob.ects emitting high energy neutrinos could provide new insights about the Universe and its active sources. The existence of these cosmic neutrinos has b.en proven by the IceCube collaboration, but the big question of which sources these neutrinos originate from, remains unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the Abyss (ARCA), with a cubic kilometer instrumented volume, is currently being built in the Mediterranean Sea. It will excel at identifying cosmic neutrino sources due to its unprecedented angular resolution for muon neutrinos (◦ for e > 10 TeV neutrinos). KM3NeT has a view of the sky complementary to IceCube, and is sensitive to neutrinos across a wide range of energies. In order to identify the signature of cosmic neutrino sources in the background of atmospheric neutrinos and muons, statistical methods are being developed and tested with Monte-Carlo pseudo-experiments. This contribution presents the most recent sensitivity estimates for diffuse, point-like and extended neutrino sources with KM3NeT/ARCA. © Copyright owned by the author(s).

关键词： Cosmology

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Reward Processing in Novelty Seekers: A Transdiagnostic Psychiatric Imaging biomarker

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bIOLOGICAL PSYCHIATRY 2021年第8期90卷 529-539页

作者： Qi, Shile Schumann, Gunter bustillo, Juan Turner, Jessica A. Jiang, Rongtao Zhi, Dongmei Fu, Zening Mayer, Andrew R. Vergara, Victor M. Silva, Rogers F. Iraji, Armin Chen, Jiayu Damaraju, eswar Ma, Xiaohong Yang, Xiao Stevens, Michael Mathalon, Daniel H. Ford, Judith M. Voyvodic, James Mueller, bryon A. belger, Aysenil Potkin, Steven G. Preda, Adrian Zhuo, Chuanjun Xu, Yong Chu, Congying banaschewski, Tobias barker, Gareth J. bokde, Arun L. W. Quinlan, erin burke Desrivieres, Sylvane Flor, Herta Grigis, Antoine Garavan, Hugh Gowland, Penny Heinz, Andreas Martinot, Jean-Luc Martinot, Marie-Laure Paillere Artiges, eric Nees, Frauke Orfanos, Dimitri Papadopoulos Paus, Tomas Poustka, Luise Hohmann, Sarah Frohner, Juliane H. Smolka, Michael N. Walter, Henrik Whelan, Robert Calhoun, Vince D. Sui, Jing [a]Tri-institutional Center for Translational Research in Neuroimaging and Data Science Georgia State University Georgia Institute Technology and Emory University Atlanta Georgia [b]Department of Psychiatry University of New Mexico Albuquerque New Mexico [c]Department of Psychology Georgia State University Atlanta Georgia [d]Olin Neuropsychiatry Research Center Hartford Connecticut [e]Department of Psychiatry University of California San Francisco San Francisco California [f]Department of Radiology Duke University Durham North Carolina [g]Department of Psychiatry University of North Carolina at Chapel Hill Chapel Hill North Carolina [h]Department of Psychiatry University of Minnesota Minneapolis Minnesota [i]Department of Psychiatry University of California Irvine Irvine California [j]Departments of Psychiatry and Psychology University of Vermont Burlington Vermont [k]Centre for Population Neuroscience and Stratified Medicine Institute for Science and Technology of Brain-Inspired Intelligence Fudan University Shanghai China [l]University of Chinese Academy of Sciences Beijing China [dd]Department of Computer Science and Engineering Nanjing University of Aeronautics and Astronautics Nanjing China [m]Brainnetome Center and National Laboratory of Pattern Recognition Institute of Automation Chinese Academy of Sciences Beijing China [ee]State Key Laboratory of Cognitive Neuroscience and Learning Beijing Normal University Beijing China [n]Psychiatric Laboratory and Mental Health Center the State Key Laboratory of Biotherapy West China Hospital of Sichuan University Chengdu China [o]Department of Psychiatric-Neuroimaging-Genetics and Morbidity Laboratory Nankai University Affiliated Anding Hospital Tianjin China [p]Department of Humanities and Social Science Shanxi Medical University Taiyuan China [q]Department of Psychiatry and Psychotherapy Charité – Universitätsmedizin Berlin Campus Charité Mitte corporate member of Freie Universität Berlin Humboldt-Univers

bACKGROUND: Dysfunctional reward processing is implicated in multiple mental disorders. Novelty seeking (NS) assesses preference for seeking novel experiences, which is linked to sensitivity to reward environmental cues. MeTHODS: A sub.et of 14-year-old adolescents (IMAGeN) with the top 20% ranked high-NS scores was used to identify high-NS-associated multimodal components by supervised fusion. These features were then used to longitudinally predict five different risk scales for the same and unseen sub.ects (an independent dataset of sub.ects at 19 years of age that was not used in predictive modeling training at 14 years of age) (within IMAGeN, n z 1100) and even for the corresponding symptom scores of five types of patient cohorts (non-IMAGeN), including drinking (n = 313), smoking (n = 104), attention-deficit/hyperactivity disorder (n = 320), major depressive disorder (n = 81), and schizophrenia (n = 147), as well as to classify different patient groups with diagnostic labels. ReSULTS: Multimodal biomarkers, including the prefrontal cortex, striatum, amygdala, and hippocampus, associated with high NS in 14-year-old adolescents were identified. The prediction models built on these features are ab.e to longitudinally predict five different risk scales, including alcohol drinking, smoking, hyperactivity, depression, and psychosis for the same and unseen 19-year-old adolescents and even predict the corresponding symptom scores of five types of patient cohorts. Furthermore, the identified reward-related multimodal features can classify among attention-deficit/hyperactivity disorder, major depressive disorder, and schizophrenia with an accuracy of 87.2%. CONCLUSIONS: Adolescents with higher NS scores can be used to reveal brain alterations in the reward-related system, implicating potential higher risk for sub.equent development of multiple disorders. The identified high-NS- associated multimodal reward-related signatures may serve as a transdiagnostic neuroimaging bi

关键词： ADHD Attention-deficit/hyperactivity disorder Major depressive disorders MDD Novelty seeking Reward processing Schizophrenia Substance use

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Atmospheric muons measured with the KM3NeT detectors in comparison with updated numeric predictions

arXiv

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arXiv 2024年

作者： Aiello, S. Albert, A. Alshamsi, M. Alves Garre, S. Ambrosone, A. Ameli, F. Andre, M. Androutsou, e. Anguita, M. Aphecetche, L. Ardid, M. Ardid, S. Arsenic, A. Atmani, H. Aublin, J. badaracco, F. bailly-Salins, L. bardačová, Z. baret, b. bariego-Quintana, A. basegmez du Pree, S. becherini, Y. bendahman, M. benfenati, F. benhassi, M. benoit, D.M. berb.e, e. bertin, V. biagi, S. b.ettcher, M. bonanno, D. boumaaza, J. bouta, M. bouwhuis, M. bozza, C. bozza, R.M. brânzaş, H. b.etaudeau, F. b.euhaus, M. bruijn, R. brunner, J. bruno, R. buis, e. buompane, R. busto, J. Caiffi, b. Calvo, D. Campion, S. Capone, A. Carenini, F. Carretero, V. Cartraud, T. Castaldi, P. Cecchini, V. Celli, S. Cerisy, L. Chabab, M. Chadolias, M. Chen, A. Cherubini, S. Chiarusi, T. Circella, M. Cocimano, R. Coelho, J.A.b. Coleiro, A. Condorelli, A. Coniglione, R. Coyle, P. Creusot, A. Cuttone, G. Dallier, R. Darras, Y. De benedittis, A. De Martino, b. Decoene, V. Del burgo, R. Del Rosso, I. Di Mauro, L.S. Di Palma, I. Díaz, A.F. Diaz, C. Diego-Tortosa, D. Distefano, C. Domi, A. Donzaud, C. Dornic, D. Dörr, M. Drakopoulou, e. Drouhin, D. Ducoin, J.-G. Dvornický, R. eberl, T. eckerová, e. eddymaoui, A. van eeden, T. eff, M. van eijk, D. el bojaddaini, I. el Hedri, S. enzenhöfer, A. Ferrara, G. Filipović, M.D. Filippini, F. Franciotti, D. Fusco, L.A. Gagliardini, S. Gal, T. García Méndez, J. Garcia Soto, A. Gatius Oliver, C. Geißelb.echt, N. Ghaddari, H. Gialanella, L. Gibson, b.K. Giorgio, e. Goos, I. Goswami, P. Gozzini, S.R. Gracia, R. Graf, K. Guidi, C. Guillon, b. Gutiérrez, M. Haack, C. van Haren, H. Heijb.er, A. Hekalo, A. Hennig, L. Hernández-Rey, J.J. Idrissi Ibnsalih, W. Illuminati, G. Joly, D. de Jong, M. de Jong, P. Jung, b.J. Kalaczynski, P. Kalekin, O. Katz, U.F. Khatun, A. Kistauri, G. Kopper, C. Kouchner, A. Kueviakoe, V. Kulikovskiy, V. Kvatadze, R. Labalme, M. Lahmann, R. Larosa, G. Lastoria, C. Lazo, A. Le Stum, S. Lehaut, G. Via Santa Sofia 64 Catania95123 Italy Université de Strasbourg CNRS IPHC UMR 7178 StrasbourgF-67000 France Aix Marseille Univ CNRS IN2P3 CPPM Marseille France University of Sharjah Sharjah Academy for Astronomy Space Sciences and Technology University Campus - POB Sharjah27272 United Arab Emirates c/Catedrático José Beltrán 2 Valencia Paterna46980 Spain INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy Università di Napoli "Federico II" Dip. Scienze Fisiche "E. Pancini" Complesso Universitario di Monte S. Angelo Via Cintia ed. G Napoli80126 Italy INFN Sezione di Roma Piazzale Aldo Moro 2 Roma00185 Italy Universitat Politècnica de Catalunya Laboratori d'Aplicacions Bioacústiques Centre Tecnològic de Vilanova i la Geltrú Avda. Rambla Exposició s/n Vilanova i la Geltrú08800 Spain NCSR Demokritos Institute of Nuclear and Particle Physics Ag. Paraskevi Attikis Athens15310 Greece University of Granada Dept. of Computer Architecture and Technology CITIC Granada18071 Spain Subatech IMT Atlantique IN2P3-CNRS Nantes Université 4 rue Alfred Kastler - La Chantrerie BP 20722 Nantes44307 France Universitat Politècnica de València Instituto de Investigación para la Gestión Integrada de las Zonas Costeras C/Paranimf 1 Gandia46730 Spain Erlangen Centre for Astroparticle Physics Nikolaus-Fiebiger-Straße 2 Erlangen91058 Germany University Mohammed V in Rabat Faculty of Sciences 4 av. Ibn Battouta B.P. 1014 RabatR.P. 10000 Morocco Université Paris Cité CNRS Astroparticule et Cosmologie ParisF-75013 France INFN Sezione di Genova Via Dodecaneso 33 Genova16146 Italy LPC CAEN Normandie Univ ENSICAEN UNICAEN CNRS IN2P3 6 boulevard Maréchal Juin Caen14050 France Czech Technical University in Prague Institute of Experimental and Applied Physics Husova 240/5 Prague110 00 Czech Republic Comenius University in Bratislava Department of Nuclear Physics and Biophysics Mlynska dolina

The measurement of the flux of muons produced in cosmic ray air showers is essential for the study of primary cosmic rays. Such measurements are important in extensive air shower detectors to assess the energy spectrum and the chemical composition of the cosmic ray flux, complementary to the information provided by fluorescence detectors. Detailed simulations of the cosmic ray air showers are carried out, using codes such as CORSIKA, to estimate the muon flux at sea level. These simulations are based on the choice of hadronic interaction models, for which improvements have b.en implemented in the post-LHC era. In this work, a deficit in simulations that use state-of-the-art QCD models with respect to the measurement deep underwater with the KM3NeT neutrino detectors is reported. The KM3NeT/ARCA and KM3NeT/ORCA neutrino telescopes are sensitive to TeV muons originating mostly from primary cosmic rays with energies around 10 TeV. The predictions of state-of-the-art QCD models show that the deficit with respect to the data is constant in zenith angle;no dependency on the water overburden is ob.erved. The ob.erved deficit at a depth of several kilometres is compatib.e with the deficit seen in the comparison of the simulations and measurements at sea level. © 2024, CC bY.

关键词： Cosmic rays

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JUNO Sensitivity to Invisib.e Decay Modes of Neutrons

arXiv

引用

arXiv 2024年

作者： Abusleme, Angel Adam, Thomas Adamowicz, Kai Ahmad, Shakeel Ahmed, Rizwan Aiello, Sebastiano An, Fengpeng An, Qi Andronico, Giuseppe Anfimov, Nikolay Antonelli, Vito Antoshkina, Tatiana de André, João Pedro Athayde Marcondes Auguste, Didier bai, Weidong balashov, Nikita baldini, Wander barresi, Andrea basilico, Davide baussan, eric bellato, Marco beretta, Marco bergnoli, Antonio bick, Daniel b.eger, Lukas biktemerova, Svetlana birkenfeld, Thilo blake, Iwan blyth, Simon bolshakova, Anastasia bongrand, Mathieu b.eton, Dominique brigatti, Augusto brugnera, Riccardo bruno, Riccardo budano, Antonio busto, Jose Cab.era, Anatael Caccianiga, barbara Cai, Hao Cai, Xiao Cai, Yanke Cai, Zhiyan Callier, Stéphane Calvez, Steven Cammi, Antonio Campeny, Agustin Cao, Chuanya Cao, Guofu Cao, Jun Caruso, Rossella Cerna, Cédric Cerrone, Vanessa Chang, Jinfan Chang, Yun Chatrabhuti, Auttakit Chen, Chao Chen, Guoming Chen, Pingping Chen, Shaomin Chen, Xin Chen, Yiming Chen, Yixue Chen, Yu Chen, Zelin Chen, Zhangming Chen, Zhiyuan Chen, Zikang Cheng, Jie Cheng, Yaping Cheng, Yu Chin Chepurnov, Alexander Chetverikov, Alexey Chiesa, Davide Chimenti, Pietro Chin, Yen-Ting Chou, Po-Lin Chu, Ziliang Chukanov, Artem Claverie, Gérard Clementi, Catia Clerbaux, barbara Molla, Marta Colomer Di Lorenzo, Selma Conforti Coppi, Alberto Corti, Daniele Csakli, Simon Cui, Chenyang Corso, Flavio Dal Dalager, Olivia Datta, Jaydeep De La Taille, Christophe Deng, Zhi Deng, Ziyan Ding, Xiaoyu Ding, Xuefeng Ding, Yayun Dirgantara, bayu Dittrich, Carsten Dmitrievsky, Sergey Dohnal, Tadeas Dolzhikov, Dmitry Donchenko, Georgy Dong, Jianmeng Doroshkevich, evgeny Dou, Wei Dracos, Marcos Druillole, Frédéric Du, Ran Du, Shuxian Duan, Yujie Dugas, Katherine Dusini, Stefano Duyang, Hongyue eck, Jessica enqvist, Timo Fabbri, Andrea Fahrendholz, Ulrike Fan, Lei Fang, Jian Fang, Wenxing Fedoseev, Dmitry Feng, Li-Cheng Feng, Qichun Ferraro, Federico Fournier, Amélie Fritsch, Fritsch Gan, Haonan Gao, Feng Gao, Feng Garfagnini, Alberto Gavrikov, Arsenii Giammarchi, Marco G Yerevan Physics Institute Yerevan Armenia Université Libre de Bruxelles Brussels Belgium Universidade Estadual de Londrina Londrina Brazil Pontificia Universidade Catolica do Rio de Janeiro Rio de Janeiro Brazil ANID Chile Pontificia Universidad Católica de Chile Santiago Chile Beijing Institute of Spacecraft Environment Engineering Beijing China Beijing Normal University Beijing China China Institute of Atomic Energy Beijing China Institute of High Energy Physics Beijing China North China Electric Power University Beijing China School of Physics Peking University Beijing China Tsinghua University Beijing China University of Chinese Academy of Sciences Beijing China Jilin University Changchun China College of Electronic Science and Engineering National University of Defense Technology Changsha China Chengdu University of Technology Chengdu China Chongqing University Chongqing China Dongguan University of Technology Dongguan China Jinan University Guangzhou China Sun Yat-Sen University Guangzhou China Harbin Institute of Technology Harbin China University of Science and Technology of China Hefei China The Radiochemistry and Nuclear Chemistry Group University of South China Hengyang China Wuyi University Jiangmen China Shandong University Jinan China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong University Qingdao China Nanjing University Nanjing China Guangxi University Nanning China East China University of Science and Technology Shanghai China School of Physics and Astronomy Shanghai Jiao Tong University Shanghai China Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences Shijiazhuang China Nankai University Tianjin China Wuhan University Wuhan China Xi’an Jiaotong University Xi’an China Xiamen University Xiamen China School of Physics and Microelectronics Zhengzhou University Z

We explore the bound neutrons decay into invisib.e particles (e.g., n → 3ν or nn → 2ν) in the JUNO liquid scintillator detector. The invisib.e decay includes two decay modes: n → inv and nn → inv. The invisib.e decays of s-shell neutrons in 12C will leave a highly excited residual nucleus. Sub.equently, some de-excitation modes of the excited residual nuclei can produce a time- and space-correlated triple coincidence signal in the JUNO detector. based on a full Monte Carlo simulation informed with the latest availab.e data, we estimate all backgrounds, including inverse beta decay events of the reactor antineutrino ν¯e, natural radioactivity, cosmogenic isotopes and neutral current interactions of atmospheric neutrinos. Pulse shape discrimination and multivariate analysis techniques are employed to further suppress backgrounds. With two years of exposure, JUNO is expected to give an order of magnitude improvement compared to the current best limits. After 10 years of data taking, the JUNO expected sensitivities at a 90% confidence level are τ/b(n → inv) > 5.0 × 1031 yr and τ/b(nn → inv) > 1.4 × 1032 yr. Copyright © 2024, The Authors. All rights reserved.

关键词： Neutrons

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Ob.ervation of high-energy neutrinos from the Galactic plane

引用

science 2023年第6652期380卷 1338-1343页

作者： Fei Huang Department of Physics Loyola University Chicago Chicago IL 60660 USA. Deutsches Elektronen-Synchrotron D-15738 Zeuthen Germany. Department of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand. Université Libre de Bruxelles Science Faculty CP230 B-1050 Brussels Belgium. Niels Bohr Institute University of Copenhagen DK-2100 Copenhagen Denmark. Oskar Klein Centre and Department of Physics Stockholm University SE-10691 Stockholm Sweden. Department of Physics TU Dortmund University D-44221 Dortmund Germany. Karlsruhe Institute of Technology Institute for Astroparticle Physics D-76021 Karlsruhe Germany. Bartol Research Institute and Department of Physics and Astronomy University of Delaware Newark DE 19716 USA. Department of Physics Marquette University Milwaukee WI 53201 USA. Department of Physics and Astronomy Uppsala University Box 516 S-75120 Uppsala Sweden. Erlangen Centre for Astroparticle Physics Friedrich-Alexander-Universität Erlangen-Nürnberg D-91058 Erlangen Germany. Department of Physics and Laboratory for Particle Physics and Cosmology Harvard University Cambridge MA 02138 USA. Department of Physics and Wisconsin IceCube Particle Astrophysics Center University of Wisconsin–Madison Madison WI 53706 USA. Department of Physics Massachusetts Institute of Technology Cambridge MA 02139 USA. Physics Department South Dakota School of Mines and Technology Rapid City SD 57701 USA. Department of Physics and Astronomy University of California Irvine CA 92697 USA. Department of Physics University of California Berkeley CA 94720 USA. Department of Astronomy Ohio State University Columbus OH 43210 USA. Department of Physics and Center for Cosmology and Astro-Particle Physics Ohio State University Columbus OH 43210 USA. Department of Physics University of Wuppertal D-42119 Wuppertal Germany. Fakultät für Physik & Astronomie Ruhr-Universität Bochum D-44780 Bochum Germany. Physik-department Technische Unive

The origin of high-energy cosmic rays, atomic nuclei that continuously impact earth's atmosphere, is unknown. because of deflection by interstellar magnetic fields, cosmic rays produced within the Milky Way arrive at earth from random directions. However, cosmic rays interact with matter near their sources and during propagation, which produces high-energy neutrinos. We searched for neutrino emission using machine learning techniques applied to 10 years of data from the IceCube Neutrino Ob.ervatory. by comparing diffuse emission models to a background-only hypothesis, we identified neutrino emission from the Galactic plane at the 4.5s level of significance. The signal is consistent with diffuse emission of neutrinos from the Milky Way but could also arise from a population of unresolved point sources.

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JUNO sensitivity to the annihilation of MeV dark matter in the galactic halo

arXiv

引用

arXiv 2023年

作者： Abusleme, Angel Adam, Thomas Ahmad, Shakeel Ahmed, Rizwan Aiello, Sebastiano Akram, Muhammad Aleem, Abid Alexandros, Tsagkarakis An, Fengpeng An, Qi Andronico, Giuseppe Anfimov, Nikolay Antonelli, Vito Antoshkina, Tatiana Asavapibhop, burin de André, João Pedro Athayde Marcondes Auguste, Didier bai, Weidong balashov, Nikita baldini, Wander barresi, Andrea basilico, Davide baussan, eric bellato, Marco bergnoli, Antonio birkenfeld, Thilo blin, Sylvie blum, David blyth, Simon bolshakova, Anastasia bongrand, Mathieu bordereau, Clément b.eton, Dominique brigatti, Augusto brugnera, Riccardo bruno, Riccardo budano, Antonio busto, Jose Cab.era, Anatael Caccianiga, barbara Cai, Hao Cai, Xiao Cai, Yanke Cai, Zhiyan Callegari, Riccardo Cammi, Antonio Campeny, Agustin Cao, Chuanya Cao, Guofu Cao, Jun Caruso, Rossella Cerna, Cédric Chan, Chi Chang, Jinfan Chang, Yun Chen, Guoming Chen, Pingping Chen, Po-An Chen, Shaomin Chen, Xurong Chen, Yixue Chen, Yu Chen, Zhiyuan Chen, Zikang Cheng, Jie Cheng, Yaping Cheng, Yu Chin Chetverikov, Alexey Chiesa, Davide Chimenti, Pietro Chu, Ziliang Chukanov, Artem Claverie, Gérard Clementi, Catia Clerbaux, barbara Di Lorenzo, Selma Conforti Corti, Daniele Corso, Flavio Dal Dalager, Olivia De La Taille, Christophe Deng, Zhi Deng, Ziyan Depnering, Wilfried Diaz, Marco Ding, Xuefeng Ding, Yayun Dirgantara, bayu Dmitrievsky, Sergey Dohnal, Tadeas Dolzhikov, Dmitry Donchenko, Georgy Dong, Jianmeng Doroshkevich, evgeny Dou, Wei Dracos, Marcos Druillole, Frédéric Du, Ran Du, Shuxian Dusini, Stefano Dvorak, Martin eck, Jessica enqvist, Timo Fabbri, Andrea Fahrendholz, Ulrike Fan, Donghua Fan, Lei Fang, Jian Fang, Wenxing Fargetta, Marco Fedoseev, Dmitry Fei, Zhengyong Feng, Li-Cheng Feng, Qichun Ferraro, Federico Ford, Richard Fournier, Amélie Gan, Haonan Gao, Feng Garfagnini, Alberto Gavrikov, Arsenii Giammarchi, Marco Giudice, Nunzio Gonchar, Maxim Gong, Guanghua Gong, Hui Gornushkin, Yuri Göttel, Alexandre Grassi, Marco Gromov, Vasily Gu, Minghao Gu, Xiaofei Gu, Yu Guan, Mengyun Guan, Yuduo Guard Yerevan Physics Institute Yerevan Armenia Université Libre de Bruxelles Brussels Belgium Universidade Estadual de Londrina Londrina Brazil Pontificia Universidade Catolica do Rio de Janeiro Rio de Janeiro Brazil Pontificia Universidad Católica de Chile Santiago Chile Universidad Tecnica Federico Santa Maria Valparaiso Chile Beijing Institute of Spacecraft Environment Engineering Beijing China Beijing Normal University Beijing China China Institute of Atomic Energy Beijing China Institute of High Energy Physics Beijing China North China Electric Power University Beijing China School of Physics Peking University Beijing China Tsinghua University Beijing China University of Chinese Academy of Sciences Beijing China Jilin University Changchun China College of Electronic Science and Engineering National University of Defense Technology Changsha China Chongqing University Chongqing China Dongguan University of Technology Dongguan China Jinan University Guangzhou China Sun Yat-Sen University Guangzhou China Harbin Institute of Technology Harbin China University of Science and Technology of China Hefei China The Radiochemistry and Nuclear Chemistry Group University of South China Hengyang China Wuyi University Jiangmen China Shandong University Jinan China Key Laboratory of Particle Physics and Particle Irradiation of Ministry of Education Shandong University Qingdao China Institute of Modern Physics Chinese Academy of Sciences Lanzhou China Nanjing University Nanjing China Guangxi University Nanning China East China University of Science and Technology Shanghai China School of Physics and Astronomy Shanghai Jiao Tong University Shanghai China Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences Shijiazhuang China Nankai University Tianjin China Wuhan University Wuhan China Xi’an Jiaotong University Xi’an China Xiamen University Xiamen

We discuss JUNO sensitivity to the annihilation of MeV dark matter in the galactic halo via detecting inverse beta decay reactions of electron anti-neutrinos resulting from the annihilation. We study possib.e backgrounds to the signature, including the reactor neutrinos, diffuse supernova neutrino background, charged- and neutral-current interactions of atmospheric neutrinos, backgrounds from muon-induced fast neutrons and cosmogenic isotopes. A fiducial volume cut, as well as the pulse shape discrimination and the muon veto are applied to suppress the above backgrounds. It is shown that JUNO sensitivity to the thermally averaged dark matter annihilation rate in 10 years of exposure would be significantly better than the present-day best limit set by Super-Kamiokande and would be comparab.e to that expected by Hyper-Kamiokande. © 2023, CC bY.

关键词： Annihilation

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The Design and Technology Development of the JUNO Central Detector

arXiv

引用

arXiv 2023年

作者： Abusleme, Angel Adam, Thomas Ahmad, Shakeel Ahmed, Rizwan Aiello, Sebastiano Akram, Muhammad Aleem, Abid Alexandros, Tsagkarakis An, Fengpeng An, Qi Andronico, Giuseppe Anfimov, Nikolay Antonelli, Vito Antoshkina, Tatiana Asavapibhop, burin de André, João Pedro Athayde Marcondes Auguste, Didier bai, Weidong balashov, Nikita baldini, Wander barresi, Andrea basilico, Davide baussan, eric bellato, Marco beretta, Marco bergnoli, Antonio bick, Daniel birkenfeld, Thilo blum, David blyth, Simon bolshakova, Anastasia bongrand, Mathieu bordereau, Clément b.eton, Dominique brigatti, Augusto brugnera, Riccardo bruno, Riccardo budano, Antonio busto, Jose Cab.era, Anatael Caccianiga, barbara Cai, Hao Cai, Xiao Cai, Yanke Cai, Zhiyan Callier, Stéphane Cammi, Antonio Campeny, Agustin Cao, Chuanya Cao, Guofu Cao, Jun Caruso, Rossella Cerna, Cédric Cerrone, Vanessa Chan, Chi Chang, Jinfan Chang, Yun Chen, Guoming Chen, Pingping Chen, Shaomin Chen, Yixue Chen, Yu Chen, Zhiyuan Chen, Zikang Cheng, Jie Cheng, Yaping Cheng, Yu Chin Chepurnov, Alexander Chetverikov, Alexey Chiesa, Davide Chimenti, Pietro Chu, Ziliang Chukanov, Artem Claverie, Gérard Clementi, Catia Clerbaux, barbara Molla, Marta Colomer Di Lorenzo, Selma Conforti Coppi, Alberto Corti, Daniele Corso, Flavio Dal Dalager, Olivia De La Taille, Christophe Deng, Zhi Deng, Ziyan Depnering, Wilfried Diaz, Marco Ding, Xuefeng Ding, Yayun Dirgantara, bayu Dmitrievsky, Sergey Dohnal, Tadeas Dolzhikov, Dmitry Donchenko, Georgy Dong, Jianmeng Doroshkevich, evgeny Dou, Wei Dracos, Marcos Druillole, Frédéric Du, Ran Du, Shuxian Dusini, Stefano Duyang, Hongyue enqvist, Timo Fabbri, Andrea Fahrendholz, Ulrike Fan, Lei Fang, Jian Fang, Wenxing Fargetta, Marco Fedoseev, Dmitry Fei, Zhengyong Feng, Li-Cheng Feng, Qichun Ferraro, Federico Fournier, Amélie Gan, Haonan Gao, Feng Garfagnini, Alberto Gavrikov, Arsenii Giammarchi, Marco Giudice, Nunzio Gonchar, Maxim Gong, Guanghua Gong, Hui Gornushkin, Yuri Göttel, Alexandre Grassi, Marco Gromov, Maxim Gromov, Vasily Gu, Minghao Gu, Xiaofei G Yerevan Physics Institute Yerevan Armenia Université Libre de Bruxelles Brussels Belgium Universidade Estadual de Londrina Londrina Brazil Pontificia Universidade Catolica do Rio de Janeiro Rio de Janeiro Brazil ANID Chile Pontificia Universidad Católica de Chile Santiago Chile Beijing Institute of Spacecraft Environment Engineering Beijing China Beijing Normal University Beijing China China Institute of Atomic Energy Beijing China Institute of High Energy Physics Beijing China North China Electric Power University Beijing China School of Physics Peking University Beijing China Tsinghua University Beijing China University of Chinese Academy of Sciences Beijing China Jilin University Changchun China College of Electronic Science and Engineering National University of Defense Technology Changsha China Chongqing University Chongqing China Dongguan University of Technology Dongguan China Jinan University Guangzhou China Sun Yat-Sen University Guangzhou China Harbin Institute of Technology Harbin China University of Science and Technology of China Hefei China The Radiochemistry and Nuclear Chemistry Group University of South China Hengyang China Wuyi University Jiangmen China Shandong University Jinan China Key Laboratory of Particle Physics and Particle Irradiation Ministry of Education Shandong University Qingdao China Nanjing University Nanjing China Guangxi University Nanning China East China University of Science and Technology Shanghai China School of Physics and Astronomy Shanghai Jiao Tong University Shanghai China Tsung-Dao Lee Institute Shanghai Jiao Tong University Shanghai China Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological Sciences Shijiazhuang China Nankai University Tianjin China Wuhan University Wuhan China Xi’an Jiaotong University Xi’an China Xiamen University Xiamen China School of Physics and Microelectronics Zhengzhou University Zhengzhou China Institute of Physics National Yang

The Jiangmen Underground Neutrino Ob.ervatory (JUNO) is a large-scale neutrino experiment with multiple physics goals including determining the neutrino mass hierarchy, the accurate measurement of neutrino oscillation parameters, the neutrino detection from the supernova, the Sun, and the earth, etc. JUNO puts forward physically and technologically stringent requirements for its central detector (CD), including a large volume and target mass (20 kt liquid scintillator, LS), a high energy resolution (3% at 1 MeV), a high light transmittance, the largest possib.e photomultiplier (PMT) coverage, the lowest possib.e radioactive background, etc. The CD design, using a spherical acrylic vessel with a diameter of 35.4 m to contain the LS and a stainless steel structure to support the acrylic vessel and PMTs, was chosen and optimized. The acrylic vessel and the stainless steel structure will be immersed in pure water to shield the radioactive background and bear great buoyancy. The challenging requirements of the acrylic sphere have b.en achieved, such as a low intrinsic radioactivity and high transmittance of the manufactured acrylic panels, the tensile and compressive acrylic node design with embedded stainless steel pad, one-time polymerization for multiple bonding lines. Moreover, several technical challenges of the stainless steel structure have b.en solved: the production of low radioactivity stainless steel material, the deformation and precision control during production and assembly, the usage of high strength stainless steel rivet bolt and of high friction efficient linkage plate. Finally, the design of the ancillary equipment like the LS filling, overflowing and circulating system was done. Copyright © 2023, The Authors. All rights reserved.

关键词： Radioactivity

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