Stopping of an Electron Ring by Induced Image Currents in Resistive Wire Loops

The possibility of trapping an electron ring in the Maryland ERA by use of a few resistive wire loops was investigated numerically. It was found that a resistive wire of 45 ohm resistance and 404 nh self-inductance was able to stop electron rings of 1013 electrons with initial axial velocities up to ßzo = 0.05. A scheme, with two resistive wires and a small local mirror field, allowed the trapping and focusing of electron rings of small axial dimension. Electron rings with relatively large axial lengths were also studied.