14-18 October 2013
Amsterdam, Beurs van Berlage
Europe/Amsterdam timezone

K-long and muon trigger in the Belle II experiment

15 Oct 2013, 17:45
Verwey Kamer (Amsterdam, Beurs van Berlage)

Verwey Kamer

Amsterdam, Beurs van Berlage

Oral presentation to parallel session Data acquisition, trigger and controls Data Acquisition, Trigger and Controls


Leo Piilonen (Virginia Tech)


I will describe the first-level trigger in the Belle II experiment that examines the hit patterns in the K-long and muon (KLM) detector to find evidence for compact clusters (indicative of a K-long meson hadronic shower) or tracks (indicative of a charged particle from the interaction point or of a cosmic ray). The algorithm is implemented in a VIRTEX6 FPGA on a Universal Trigger Module (used throughout the Belle II experiment) that receives raw inputs from each of the KLM sectors via 32 fiber-optic cables, sorts these data, performs rudimentary cluster-finding and track-fitting, and delivers its output to the Global Decision Logic module. I also describe the offline KLM-trigger simulation module in the Belle II data analysis code library.

Primary author

Leo Piilonen (Virginia Tech)


Presentation Materials