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The Event Timing Finder for the Central Drift Chamber Level-1 Trigger at the Belle II experiment

Sue, Yuki; Hanwook, Bae; Iijima, Toru; Iwasaki, Yoshihito; Koga, Taichiro; Lai, Yun-Tsung; Nakazawa, Hideyuki; Unger, Kai Lukas ORCID iD icon 1
1 Institut für Technik der Informationsverarbeitung (ITIV), Karlsruher Institut für Technologie (KIT)

Abstract:

The level-1 trigger system of the Belle II experiment is designed to select physics events of interest with almost 100% efficiency for hadronic events. In terms of event timing decision, the level-1 trigger is required to have an accuracy of less than 10 ns. The Central Drift Chamber (CDC) level-1 trigger provides the event timing information as one of the level-1 timing sources. We developed the new algorithm to measure the event timing with an accuracy of about 10 ns based on the CDC hit timing. Two-dimensional charged track reconstruction by Hough transformation was utilized to reduce high background hits. We used a new-developed general-purpose FPGA board (Universal Trigger board 4) for this module for the first time. We report the performance of the new algorithm using e$^+$e$^−$ collision data collected in 2020.


Verlagsausgabe §
DOI: 10.5445/IR/1000154543
Veröffentlicht am 16.01.2023
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Technik der Informationsverarbeitung (ITIV)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 06.12.2022
Sprache Englisch
Identifikator ISSN: 1742-6588, 1742-6596
KITopen-ID: 1000154543
Erschienen in Journal of Physics: Conference Series
Verlag Institute of Physics Publishing Ltd (IOP Publishing Ltd)
Band 2374
Seiten Art.-Nr.: 012103
Nachgewiesen in Scopus
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