Speaker
Description
The Belle II at SuperKEKB electron-positron collider is the new generation B-factory experiment and calorimetry plays an important role to detect neutral particles and reconstruct missing energy/momentum. The CsI(Tl) crystals with the PIN-Photodiode readout are inherited from Belle experiment and readout electronics and data acquisition system are replaced to cope with the high event rate provided by the high luminosity of SuperKEKB accelerator. After accumulating the data corresponding to 428/fb by 2022 summer, we replaced the data acquisition system backend by the PCIe40 based system to receive the data flow from the frontend, updated luminosity monitor firmware and relevant systems, and resumed physics run from 2024 February. Recent operation status and performance at current physics runs are to be reported.
