Deflection-type energy analyzer for energetic electron beams in a beam-plasma system

An energy analyzer for the study of electron beam distribution functions in unmagnetized plasmas is described. This analyzer is designed to avoid large electric fields that are created in multigrid analyzers and to measure directly the beam distribution function without differentiation. As an example of an application, results are presented on the propagation of an energetic beam (E/sub b/ : 2.0 keV) in a plasma (n/sub o/ : 1. x 1010 cm-3, T/sub e/ : 1.4 eV)