Speaker
Description
The K-Long and Muon (KLM) detector is the largest subsystem of the
Belle II experiment, dedicated to muon and neutral hadron detection.
This paper presents the development and implementation of the KLM
Control System, a critical infrastructure engineered to ensure
detector safety, operational stability, and high-quality data
acquisition. The architecture is structured into three principal
domains: Run control, High Voltage (HV) control, and passive
monitoring. We detail the system upgrades within Run control,
specifically the transition from legacy electronics to the PCIe40
readout interface. The design of the HV system is discussed, covering
the integration of hardware-based safety interlocks, dark current
monitoring for background assessment, and a custom test bench
framework developed to validate control logic and automatic recovery
procedures. Passive monitoring tools are also described, including the
implementation of the Resistive Plate Chamber (RPC) gas flow
monitoring system and its integration with the central alarm system.
Finally, we demonstrate the robustness of these developments by
evaluating live Data Quality Monitoring (DQM) metrics, error-frequency
distributions, and their correlation with muon reconstruction
efficiency.