Proton Radiography: Cross Section Measurements and Detector Development Page: 4 of 14
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provide data for simulations of the technique and for interpretation of the images. The goal of
Experiment 907 at Fermilab is to do a comprehensive set of measurements of production cross
sections for protons, pions, kaons, and neutrons for beam energies between 5 and 120 GeV for a
wide variety of targets. The University of Michigan group is responsible for the forward detec-
tors that detect neutrons and photons produced in the near-forward direction.
E-907 at Fermilab (MIPP)
E-907 (Main Injector Particle Production) at Fermilab is an experiment to measure particle
production using primary and secondary beams from the Main Injector [7]. It is a collaboration
of the University of Colorado, Fermi National Accelerator Laboratory, Harvard University, Illi-
nois Institute of Technology, the University of Iowa, Indiana University, Lawrence Livermore
Laboratory, the University of Michigan, Purdue University, the University of South Carolina,
and the University of Virginia. MIPP will supply information critical to the Main Injector Neu-
trino Oscillation Search (MINOS) experiment and other basic physics experiments, as well as
data needed to design and plan for proton radiography using higher energy beams.
E-907 officially started physics running at Fermilab in January 2005, and data taking contin-
ued through February 2006. Data were taken on a range of targets, from liquid hydrogen to ura-
nium, at beam energies from 5 GeV/c to 120 GeV/c. The analysis of the data is challenging be-
cause data from many different detector systems must be understood and merged and over 31
million events were accumulated.
The MIPP Detectors
A plan view of the MIPP detectors is shown in Fig. 1 with the beam coming from the left.
More detail is provided in Appendix I and at the MIPP web site, http://ppd.fnal.gov/experiments/
e907. The experiment is set up in the Fermilab Meson Center beam line. Our group has many
years of experience with neutron scattering experiments and hadron calorimeters. Thus it was
natural for the University of Michigan group to take responsibility for the MIPP electromagnetic
shower detector (EMCAL) and the neutron calorimeter (HCAL). The purpose of the EMCAL is
to detect and measure the angles and energies of forward photons. The HCAL detects neutrons
and other hadrons and measures their energies.
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Longo, Michael J.; Rajaram, H. R. Gustafson: Durga & Nigmanov, Turgun. Proton Radiography: Cross Section Measurements and Detector Development, text, April 16, 2010; United States. (https://digital.library.unt.edu/ark:/67531/metadc931132/m1/4/: accessed April 25, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.