Noise reduction in slow beam waves by parametric cooling

Claim 1

A HIGH FREQUENCY AMPLIFIER INCLUDING, MEANS FOR FORMING AND PROJECTING AN ELECTRON BEAM ALONG A PATH WITH BOTH FAST AND SLOW BEAM WAVE MODES OF PROPAGATION AND NOISE WAVE ENERGY THEREON, MEANS FORMING A PUMPING RADIO FREQUENCY CIRCUIT STRUCTURE POSITIONED ALONG SAID PATH FOR MODULATING SAID BEAM WITH A HIGH FREQUENCY PUMP CIRCUIT WAVE, MEANS FORMING A COOLING RADIO FREQUENCY CIRCUIT STRUCTURE POSITIONED COEXTENSIVELY ALONG SAID BEAM PATH WITH SAID FIRST MENTIONED PUMP STRUCTURE MEANS IN WAVE COUPLING RELATIONSHIP WITH SAID BEAM FOR EFFECTING A TRANSFER OF NOISE WAVE ENERGY FROM THE SLOW BEAM MODE OF SAID BEAM AT A SIGNAL FREQUENCY TO SAID COOLING STRUCTURE MEANS, MEANS FOR MODULATING SAID SLOW BEAM MODE OF SAID BEAM WITH WAVE ENERGY AT THE SIGNAL FREQUENCY, MEANS FORMING A SLOW-WAVE RADIO FREQUENCY CIRCUIT STRUCTURE COUPLED TO SAID SLOW BEAM MODE OF SAID BEAM DOWNSTREAM OF SAID COOLING STRUCTURE MEANS FOR EFFECTING A CUMULATIVE BEAM-FIELD INTEERACTION WITH SAID SLOW BEAM MODE TO PRODUCE LOW NOSIE AMPLIFICATION OF SAID SIGNAL WAVE, AND MEANS FOR EXTRACTING AMPLIFIED SIGNALS FROM SAID BEAM.