A Study Of The Energy Dependence Of Radiation Damage In Superconducting   Coils For a Next Generation Mu2e At PIP-II
  The Mu2e experiment at Fermilab is being designed to study the coherent neutrino-less conversion of a negative muon into an electron in the field of a nucleus. This process has an extremely low probability in the Standard Model, and its observation would provide unambiguous evidence for beyond the standard model physics. The Mu2e design aims to reach a single-event-sensitivity of about $2.5 \times 10^{-17}$ and will probe effective new physics mass scales in the 103-104 TeV range, well beyond the reach of the LHC. This work will examine the maximum beam power that can be tolerated for beam energies in the 0.5-8 GeV range. This has implications for how the sensitivity might be further improved with a second generation experiment using an upgraded proton beam from the PIP-II project, which will be capable of providing MW beams to Fermilab experiments later in the next decade. 
V. Pronskikh, D. Glenzinski, K. Knoepfel, N. Mokhov, R. Tschirhart   (Fermilab)
physics.acc-ph physics.ins-det