Development of the Fast Front-end Trigger System for COMET Phase-I

Yuki Fujii, Yu Nakazawa, Ewen Lawson Gillies, Eitaro Hamada, Masahiro Ikeno, Myeongjae Lee, Satoshi Mihara, Yuta Miyazaki, Masayoshi Shoji, Chau Thanh Tai, Tomohisa Uchida, Kazuki Ueno

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearch

3 Citations (Scopus)

Abstract

A COMET Experiment Phase-I is designed to search for a muon to an electron conversion with a 100 times better sensitivity than the current upper limit on its branching ratio in order to investigate the new physics beyond the standard model. To achieve such an unprecedented sensitivity, a high intensity muon beam is mandatory. In consequence, an extremely high hit rate is predicted and it can cause a high trigger rate more than tens of kHz dominated by the background events. Then the high trigger rate would lead to the severe dead-time in the data acquisition. Therefore it is essential for a success of the experiment to reduce the trigger rate down to a few kHz within a processing time shorter than 5 μs while maintaining the signal efficiency high enough. We are developing an event classification algorithm utilising a CDC hit information and a dedicated fast online trigger system to accomplish this aim. The event classification based on a boosted decision tree shows 3.8 kHz of trigger rate, which almost satisfies the rate requirement, with a good compatibility to the trigger electronics. The total processing time to generate the trigger decision is estimated to be ~3 μs which also fulfils the timing requirement.

Original languageEnglish
Title of host publication2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings
Subtitle of host publication2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018; Sydney; Australia; 10 November 2018 through 17 November 2018
Place of PublicationPiscataway NJ USA
PublisherIEEE, Institute of Electrical and Electronics Engineers
Pages336-339
Number of pages4
ISBN (Electronic)9781538684948
DOIs
Publication statusPublished - 5 Sept 2019
EventIEEE Nuclear Science Symposium and Medical Imaging Conference 2018 - International Convention Centre, Sydney, Australia
Duration: 10 Nov 201817 Nov 2018
https://ieeexplore.ieee.org/document/8305570

Publication series

Name2018 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2018 - Proceedings

Conference

ConferenceIEEE Nuclear Science Symposium and Medical Imaging Conference 2018
Abbreviated titleNSS/MIC 2018
Country/TerritoryAustralia
CitySydney
Period10/11/1817/11/18
Internet address

Keywords

  • CLFV
  • COMET
  • FPGA
  • Trigger System

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