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95 GHz gyrotron with ferroelectric cathode.

M Einat¹, M Pilossof, R Ben-Moshe

¹Faculty of Engineering, Ariel University Center of Samaria, Ariel 40700, Israel.

Physical Review Letters

|December 11, 2012

Summary

This study demonstrates a ferroelectric cathode as a viable electron source for high-frequency gyrotrons. The research achieves 95 GHz output, paving the way for compact, high-power millimeter wave sources.

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Area of Science:

Physics
Electrical Engineering
Materials Science

Background:

Ferroelectric cathodes show promise as electron sources for microwave tubes.
Surface plasma emission from these cathodes poses challenges for millimeter wave tube operation.
There is a growing demand for compact, high-power millimeter wave sources, particularly at 95 GHz.

Purpose of the Study:

To investigate the use of a ferroelectric cathode as an electron source for a gyrotron operating at 95 GHz.
To assess the performance and feasibility of ferroelectric cathodes in high-frequency millimeter wave generation.

Main Methods:

A ferroelectric cathode was employed as the electron source in a gyrotron experiment.
The gyrotron's output frequency was extended to 95 GHz.

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Performance metrics including peak power and pulse duration were measured.

Main Results:

The gyrotron successfully operated at an output frequency of 95 GHz.
Peak power exceeding 5 kW was achieved.
Pulses of approximately 0.5 μs duration were recorded, with an estimated achievable duty cycle of 10%.

Conclusions:

Ferroelectric cathodes can be effectively utilized as electron sources for high-frequency gyrotrons.
The experimental results support the potential of ferroelectric cathodes for developing compact, high-power 95 GHz millimeter wave sources.
Further optimization may lead to higher duty cycles and improved performance.