Free electron laser experiments with and without a guide magnetic field: A review of millimeter-wave free-electron laser research at the Naval Research Laboratory

A review of the millimeter-wave free-electron laser experimental program at the Naval Research Laboratory is presented. Specific attention is focused on the recent results of superradiant and amplifier experiments on a pulseline accelerator using an axial guide magnetic field, and on the results of a superradiant experiment on a linear induction accelerator without a guide magnetic field.