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Recent experiments on the first Recirculating Planar Magnetron (RPM) prototype, the L-band RPM-12a, have demonstrated successful generation of microwave power in the vicinity of pi-mode at 1 GHz using a −300 kV pulsed voltage and 0.2 T axial magnetic field. However, these initial experiments were designed primarily to demonstrate feasibility and validate the RF dispersion relationship. This prototype...
We examine the Brillouin flow in the conventional magnetron, inverted magnetron, and planar magnetron, with respect to the equilibrium, stability, and operating conditions. This renewed interest was prompted by our recent invention of the recirculating planar magnetron (RPM), where rapid startup utilizes the negative mass instability in the inverted magnetron configuration. Given that Brillouin flow...
The Recirculating Planar Magnetron (RPM) is a crossed-field device which presents numerous potential advantages in generating High Power Microwaves (HPM). A 12-cavity, conventional-polarity, 1-GHz RPM model has been experimentally designed and tested at a −300 kV, 0.3–0.5 microsecond pulselengths and a 0.2 T axial magnetic field. The experimental results and future concepts are under investigation.
The Recirculating Planar Magnetron (RPM) is a crossed-field device which presents numerous advantages in generating HPM. A 12-cavity, conventional-polarity, 1GHz model was designed and tested at a −300 kV, 0.3–0.5 microsecond pulselength and a 0.3 T axial magnetic field. The initial design and experimental results are discussed.
The Buneman-Hartree (B-H) condition is reexamined in a cylindrical relativistic magnetron using both the conventional single particle model, and the Brillouin flow model. These two models yield the same result for the Buneman-Hartree condition only in the limit of a planar magnetron. In general, the B-H condition according to the Brillouin flow model allows a wider range of operating conditions, consistent...
An inverted magnetron, with its cathode on the outside and anode on the inside, exhibits faster startup than a conventional magnetron because of the negative-mass behavior of the rotating electron. The tendency toward azimuthal bunching in rotating electrons in a crossed-field device is analyzed with the Particle-In-Cell code, MAGIC.
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