  The Main Injector Particle Production (MIPP) experiment is a fixed target
hadron production experiment at Fermilab. It measures particle production in
interactions of 120 GeV/c primary protons from the Main Injector and secondary
beams of $\pi^{\pm}, \rm{K}^{\pm}$, p and $\bar{\rm{p}}$ from 5 to 90 GeV/c on
nuclear targets which include H, Be, C, Bi and U, and a dedicated run with the
NuMI target. MIPP is a high acceptance spectrometer which provides excellent
charged particle identification using Time Projection Chamber (TPC), Time of
Flight (ToF), multicell Cherenkov (CKOV), Ring Imaging Cherenkov (RICH)
detectors, and Calorimeter for neutrons. We present inelastic cross section
measurements for 58 and 85 GeV/c p-H interactions, and 58 and 120 GeV/c p-C
interactions. A new method is described to account for the low multiplicity
inefficiencies in the interaction trigger using KNO scaling. Inelastic cross
sections as a function of multiplicity are also presented. The MIPP data are
compared with the Monte Carlo predictions and previous measurements. We also
describe an algorithm to identify charged particles
($\pi^{\pm}/\rm{p}/\bar{\rm{p}}$ etc.), and present the charged pion and kaon
spectra from the interactions of 120 GeV/c protons with carbon target.

High Energy Physics - Experiment;Nuclear Experiment