  Retarding field analyzers (RFAs), which provide a localized measurement of
the electron cloud, have been installed throughout the Cornell Electron Storage
Ring (CESR), in different magnetic field environments. This paper describes the
RFA designs developed for dipole, quadrupole, and wiggler field regions, and
provides an overview of measurements made in each environment. The
effectiveness of electron cloud mitigations, including coatings, grooves, and
clearing electrodes, are assessed with the RFA measurements.
