Head and Tail Compression of an Electron Beam

We present results of longitudinally compressing a beam bunch by inwardly displacing both the head and tail end focusing fields used to contain the beam. This method of compression is different from the conventional velocity tilt method that rotates the beam in phase space. Simulation and experimental results are presented at numerous compression rates. The results described below assume an injected longitudinal current profile into the University of Maryland Electron Ring (UMER) that is uniform both in current and velocity.