An 85 GHz, TE11 mode cyclotron auto-resonance maser (CARM) amplifier experiment is being planned at NRL. The experiment will use a Marx accelerator, a field-emission diode, and a 1 kW, 85 GHz Extended Interaction Oscillator (EIO). The accelerator will provide electron beam pulses with duration in excess of 100 nsec. A wiggler will be used to provide transverse momentum to the 10-100 A, 500 kV pencil electron beam. Stability against absolute instabilities is a critical issue for CARM Amplifiers. The goal of this program is to study the stability of a CARM amplifier theoretically and experimentally over a wide range of parameters.
C. A. Sullivan, C. A. Sullivan,
"The NRL 85 GHz CARM amplifier experiment", Proc. SPIE 1514, 15th International Conference on Infrared and Millimeter Waves, 151467 (1 December 1990); doi: 10.1117/12.2301633; https://doi.org/10.1117/12.2301633