Cesium iodide cathodes for high-power microwave devices

Ryan J. Umstattd; Donald A. Shiffler; Michael D. Haworth; Kyle J. Hendricks; John W. Luginsland; Thomas A. Spencer

doi:10.1117/12.351207

1 July 1999 Cesium iodide cathodes for high-power microwave devices

Ryan J. Umstattd, Donald A. Shiffler, Michael D. Haworth, Kyle J. Hendricks, John W. Luginsland, Thomas A. Spencer

Proceedings Volume 3702, Intense Microwave Pulses VI; (1999) https://doi.org/10.1117/12.351207
Event: AeroSense '99, 1999, Orlando, FL, United States

Abstract

A variety of cesium iodide-coated carbon fiber cathodes have been designed and tested for high voltage (300 - 500 kV), high current operation. Here, we describe the conditioning process and present the most recent experimental data for a thin annular beam test diode. During these reproducible microsecond-duration pulses, this diode exhibits promising beam impedance maintainability and gap closure speeds of less than 0.4 cm/microsecond(s) ec. Also presented are recent results for a carbon fiber cathode tested in a relativistic klystron oscillator and future plans for such a cathode in the magnetically insulated line oscillator.

Citation Download Citation

Ryan J. Umstattd, Donald A. Shiffler, Michael D. Haworth, Kyle J. Hendricks, John W. Luginsland, and Thomas A. Spencer "Cesium iodide cathodes for high-power microwave devices", Proc. SPIE 3702, Intense Microwave Pulses VI, (1 July 1999); https://doi.org/10.1117/12.351207

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