Extending the Control Software for Beam Interlock System 2

The Beam Interlock System (BIS) is a network of devices aiming to protect the machinery of the Large Hadron Collider (LHC) complex. The BIS devices are used to calculate the value of the Global Beam Permit, a control signal that, if false, triggers the LHC Beam Dumping System. A new version of the system – BIS2 – with increased flexibility, diagnostic capabilities, and safety guarantees is being developed. It will be running in parallel to BIS and, as it requires a similar Control System, its introduction is an opportunity to renovate the software in place. The new solution adapts the Unified Controls Acquisition and Processing (UCAP) framework which facilitates the integration between different controls subsystems of the accelerators. In July and August of 2022, the new control software has been extended in two ways. First, the existing code was reorganized to improve the reusability of the generators for virtual device definitions. Second, generators for five new functionalities have been implemented in the system. Keywords: interlocks, interlock system, BIS, BIS2, machine protection, UCAP, control software