The BLM Thresholds Working Group takes a global view on thresholds and the way they are implemented in the machine.

It relies on the analyses and operational experience of the responsible teams (Machine Protection Panel, Collimation Working Group, magnet group, LHC Magnet Circuits, Powering and Performance Panel, etc.).

Its tasks, in close collaboration with the responsible teams, are to

• collect and discuss information on performance and protection aspects of BLM thresholds during LHC beam operation;
• study BLM thresholds in the context of beam-losses due to dust particles (or "UFOs");
• propose changes to BLM thresholds and to the BLM sensitivity range for approval to rMPP/MPP or LMC;
• trace threshold changes in a consistent way;
• propose and analyze controlled beam-loss tests ("quench tests") to validate and improve the numerical models and to improve the understanding of beam-loss scenarios;
• trigger complementary analyses of beam-loss events in order to increase the global understanding of quench- and damage levels;
• review the composition of BLM families and the designation of relevant beam-loss scenarios (per family, energy level, and loss-duration), as well as the tools for the production and deployment of BLM thresholds.

Reports to: rMPP/MPP, for strategic decisions to LMC