Beam-induced electron multipacting with mode resonance in a vacuum chamber

Abstract Some vacuum chambers in particle accelerators perform a waveguide- or resonator-like behavior due to their unique geometries. Electron multipacting caused by such structural property might be able overwhelm the classical beam-induced multipacting. This article shows that wakefields of beams could stimulate resonant modes chamber with near-rectangular waveguide shape and accordingly induce much stronger electron avalanche chamber. Especially, it has been believed is responsible for pressure rise chamber, where energetic secondary electrons growing numbers collide gas particles at wall. Based on numerical simulations, mechanism mode resonance proposed, which can explain significant variation measured our cryogenic