Development of Slow Control Package for the Electromagnetic Calorimeter Trigger System at the Belle II experiment

Abstract

In order to detect the new physics effect with heavy quark and lepton weak decays, the Belle II experiment held at the SuperKEKB in KEK(Japan) started Phase II, the second stage of the experiment, purpose of which are first beam collision test, sub-detector calbribration with beam and first physics data taking [1]. Belle II detector status have to be monitored for stable operation during trigger and DAQ operation upon beam collision. Slow control system, is one of main monitoring and controlling framworks of Belle II experiment, is based on NSM2(Network Shared Memory II) which is advanced version of NSM used at the Belle experiment. The technique let for all systems connected to Belle II server share data by memory sharing via network [2]. The ECL Trigger slow control system is the slow control system for Electomagnetic Calorimeter Trigger system. This system consists of 3 parts which are the user module, the configuration database and the archiver.In this study, we report the development of slow control system for the Belle II electromagnetic calorimeter (ECL) trigger system during ongoing Phase II.

The trigger slow control system of the Belle II experiment

“…Especially, FAM hit-rates and average hit-rates PVs are utilized not only by the trigger group but also by the Su-perKEKB side for beam tuning. Additionally, the ECL trigger slow control system provides an automatic parameter setting function depending on run condition [17].…”