Measurements of the GHz emission by a 3 MeV electron beam

The MAYBE (Microwave Air Yield Beam) Experiment is dedicated to the study of the microwave emission from particle beams in light of its possible use for the detection of ultra high energy cosmic rays. Measurements of the microwave emission were performed at the 3 MeV electron beam in the Van de Graaff facility at the Argonne National Laboratory. Results include the measured spectrum between 1 and 15 GHz, the polarization, and the scaling of the emission power with respect to the beam intensity. MAYBE measurements provide further insight on microwave emission as a detection technique for ultra-high energy cosmic rays.