Performance and extensions of the central data acquisition systems for Phase II of the Pierre Auger Observatory

The Pierre Auger Observatory is a hybrid detector designed to observe and study ultra-high-energy particles of extraterrestrial origin. With its 27 fluorescence telescopes and over 1600 autonomously operating water-Cherenkov detectors spread over an area of 3000 km2, it is world-leading in terms of exposure to cosmic rays and offers an unparalleled window into the physical processes that happen at energy scales unattainable by particle accelerators on Earth. Measurement information of candidate air-shower events from all associated detectors and tele- scopes is collected at a central data-acquisition system located in the nearby town of Malargüe, and processed for higher-level physics analysis. On top of this, data for monitoring the long-term stability and operation of the observatory is forwarded to the central server as well. In this work, we briefly review the central data-acquisition system of the Pierre Auger Observatory. We examine the rates, efficiencies, and purity of detected events for Phase II of the Pierre Auger Observatory and compare them to performance parameters during Phase I. We detail challenges in the event detection up until now and present recent changes in the central data acquisition system and local station software that aim to streamline the data acquisition chain.

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Published
2025-09-24
DOI
https://doi.org/10.22323/1.501.0254
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Astronomical Observations and Instrumentation
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article
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Performance and extensions of the central data acquisition systems for Phase II of the Pierre Auger Observatory

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Astronomical Observations and Instrumentation
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Performance and extensions of the central data acquisition systems for Phase II of the Pierre Auger Observatory

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Abstract

The Pierre Auger Observatory is a hybrid detector designed to observe and study ultra-high-energy particles of extraterrestrial origin. With its 27 fluorescence telescopes and over 1600 autonomously operating water-Cherenkov detectors spread over an area of 3000 km2, it is world-leading in terms of exposure to cosmic rays and offers an unparalleled window into the physical processes that happen at energy scales unattainable by particle accelerators on Earth. Measurement information of candidate air-shower events from all associated detectors and tele- scopes is collected at a central data-acquisition system located in the nearby town of Malargüe, and processed for higher-level physics analysis. On top of this, data for monitoring the long-term stability and operation of the observatory is forwarded to the central server as well. In this work, we briefly review the central data-acquisition system of the Pierre Auger Observatory. We examine the rates, efficiencies, and purity of detected events for Phase II of the Pierre Auger Observatory and compare them to performance parameters during Phase I. We detail challenges in the event detection up until now and present recent changes in the central data acquisition system and local station software that aim to streamline the data acquisition chain.

National Science Foundation, U.S. Department of Energy, Grainger Foundation, Strong, Ministerul Cercetării, Inovării şi Digitalizării, European Commission, Deutsche Forschungsgemeinschaft, Agence Nationale de la Recherche, Fundação de Amparo à Pesquisa do Estado de São Paulo, Ministerstvo Školství, Mládeže a Tělovýchovy, Grantová Agentura České Republiky, Bundesministerium für Bildung und Forschung, Fonds De La Recherche Scientifique - FNRS, Consejo Nacional de Investigaciones Científicas y Técnicas, Fonds Wetenschappelijk Onderzoek, Consejo Nacional de Ciencia y Tecnología, Nederlandse Organisatie voor Wetenschappelijk Onderzoek, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Javna Agencija za Raziskovalno Dejavnost RS, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Centre National de la Recherche Scientifique, Financiadora de Estudos e Projetos, Ministerio de Ciencia e Innovación, Istituto Nazionale di Astrofisica, Universidad Nacional Autónoma de México, Unitatea Executiva pentru Finantarea Invatamantului Superior, a Cercetarii, Dezvoltarii si Inovarii, Xunta de Galicia, Junta de Andalucía, Ministério da Ciência, Tecnologia, Inovações e Comunicações, Vlaamse regering, Istituto Nazionale di Fisica Nucleare, Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen, Helmholtz Alliance for Astroparticle Physics, Ministero dell'Università e della Ricerca, Fundação para a Ciência e a Tecnologia, Agencia Nacional de Promoción Científica y Tecnológica, Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México, European Regional Development Fund, Agencia Estatal de Investigación, Institut National de Physique Nucléaire et de Physique des Particules
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Astronomical Observations and Instrumentation
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