Speaker
Description
The muon system of the Compact Muon Solenoid (CMS) comprises several gaseous detectors, including Resistive Plate Chambers (RPCs). Each data-taking year, a high-voltage (HV) scan is performed to ensure proper chamber operation and determine the optimal operating voltage of the RPCs. A new algorithm is proposed for determining the HV channel working points by scanning a range of voltages and selecting the optimal value that provides an efficiency and cluster size within the requirements for all detector modules connected to this HV channel. The algorithm was tested using 2025 and 2026 HV Scan calibration data and compared with the standard procedure. The results show increased efficiency with respect to the standard algorithm while restricting cluster size to stay reasonably low. Although differences in operating voltage are observed for some channels compared to the standard procedure, the new method offers a more precise way to determine the working point by maximizing the number of detector modules within a channel satisfying the efficiency and cluster size requirements.