# EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

## The data acquisition and trigger system of the Belle II experiment

25 Jul 2015, 10:00
15m
HS42 ()

### HS42

talk Detector R&D and Data Handling

Chunhua Li

### Description

Both the trigger and the data acquisition systems of the Belle II experiment at the SuperKEKB collider in Tsukuba, Japan, are completely redesigned to cope with the considerably higher event and background rates compared to the previous Belle experiment. Belle II hardware (Level-1) trigger consists of several sub-triggers and a final decision logic, which issues the trigger with a fixed latency of about 5 $\mu$s after bunch crossing. The data acquisition (DAQ) system reads the detector signals upon the Level-1 trigger decision and transfers the data from the front-end electronics through several steps of data processing to the storage system. In this presentation, we review the design of these two systems and describe the current state of their construction.