Beam Size Reconstruction from Ionization Profile Monitors

Ionization profile monitors (IPMs) are widely used in particle accelerators for fast evaluation of parameters of high energy beams. Due to the space-charge effects and several other physical reasons, as well as due to instrumental effects, the measured IPM profiles differ from the those of the beams. Empirical mathematical models are commonly used for reconstruction of the profiles. Here we present proper correction algorithm based on the space-charge dynamics of the secondaries in IPMs. We also demonstrate efficiency of the beam size reconstruction from experimentally measured profiles and discuss practical aspects limiting the IPM accuracy.