  The ionization profile monitors (IPMs) are used to measure the beam size in
synchrotrons. Both the Fermilab Recycler and Main Injector (MI) machines have
IPMs. However, they were not well understood enough to provide confidence in
their measurements. Accurately measuring beam size through the IPMs was crucial
to recognize the loss mechanisms for accelerators and to keep the beam loss to
a minimum. Thus, performing measurements with different parameters using the
IPMs led to a better analysis on how changes in conditions affect the beam
size. The IPM measurements are compared with that of multi-wires in the
upstream transfer line after applying corrections. The results were compared
with other diagnostics and the change in the beam size for different parameters
are presented in this paper.
