Beam Tests of Ionization Chambers for the NuMI Neutrino Beam

Abstract — We have conducted tests at the Fermilab Booster of ionization chambers to be used as monitors of the NuMI neutrino beamline. The chambers were exposed to proton fluxes of up to 1012 particles/cm2/1.56µs. We studied potential space charge effects which could reduce signal collection from the chambers at large charged particle beam intensities. Index Terms — Ionization chambers, ionizing radiation, multi-plication, neutrinos, particle beam measurements, space charge