Ion Chamber Arrays for the Numi Beam at Fermilab
  The Neutrinos at the Main Injector (NuMI) beamline will deliver an intense muon neutrino beam by focusing a beam of mesons into a long evacuated decay volume. We have built 4 arrays of ionization chambers to monitor the neutrino beam direction and quality. The arrays are located at 4 stations downstream of the decay volume, and measure the remnant hadron beam and tertiary muons produced along with neutrinos in meson decays. 
D.Indurthy (1), Z.Pavlovic (1), R.Zwaska (1), R.Keisler (1), S.Mendoza   (1), S.Kopp (1), M.Proga (1), D.Harris (2), A.March...