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Determine the release mechanism (electrostatic detachment driven by beam-induced charging or electron cloud, mechanical vibration, magnetic forces on ferromagnetic grains) and predict the event rate versus beam intensity, bunch spacing and cumulative beam time.","problem_ref":"58464bb5aad78603c230dcdcffe3735d686418908fcdcb1c899a41d1a34301e3","references":"","settled_by":"Laboratory release tests on beam-screen surfaces under electron bombardment and electric field that reproduce the measured dependence of the event rate on intensity and conditioning time.","status_note":"Dust-beam interaction dynamics were modeled and matched to loss signals in 2020 (Lindstrom et al., https://doi.org/10.1103/PhysRevAccelBeams.23.124501); the release step is not established.","title":"Release mechanism of dust grains causing fast LHC beam 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