Some studies related to noise/instability, efficiency, gun designs, etc. for crossed-field devices

The use of a simple impedance transformer in conjunction with a modified long-Kino gun to significantly reduce the diocotron gain in the gun region of a crossed-field device is described. Provision for arbitrarily varying the entrance velocity to the interaction region making frequency modulation of the device possible. By changing the electric field in the transformer region, the electron trajectories for varying current densities may be optimized, allowing amplitude modulation of the device. The design of the transformer is simple and does not require computer design.