Abstract
When a short electron bunch traverses an undulator to radiate a wavelength longer than the bunch length, intense superradiance from the electrons can quickly deplete the electron's kinetic energy and lead to generation of an isolated chirped radiation pulse. Here, we develop a theory to describe this chirped pulse radiation in such a superradiant FEL and show the opportunity to generate isolated few-cycle high-power radiation through chirpedpulse compression after the FEL.