Electrical and Computer Engineering ETDs

Publication Date

Spring 3-9-2022

Abstract

The relativistic magnetron with diffraction output (MDO) is one of the most efficient
microwave sources for sub-100 ns pulses. For pulse widths greater than 100 ns, the microwave production stops due to anode-cathode (A−K) gap closure. In the presence of a solid cathode, the anode and cathode plasmas expand towards each other, shorting the gap. A research team at The Technion Israel Institute of Technology proposed to replace a solid cathode with a split cathode in a magnetron with radial extraction to mitigate gap closure and maximize microwave production from a long pulse generator. Such a cathode geometry comprises an emitter (which injects the beam from outside the magnetron interaction region) and a reflector (downstream of the magnetron interaction region) at the same potential as the emitter.
This dissertation describes the problem and provides a detailed analysis of the
split cathode behavior in a relativistic MDO.

Keywords

magnetron, split cathode, long pulse, high power microwaves, HPM, relativistic

Sponsors

ONR Grant No. N00014-19-1-2155 and Verus Research Subcontracts Nos. 1112-00045 and 1130-00055

Document Type

Dissertation

Language

English

Degree Name

Electrical Engineering

Level of Degree

Doctoral

Department Name

Electrical and Computer Engineering

First Committee Member (Chair)

Edl Schamiloglu

Second Committee Member

Christos Christodoulou

Third Committee Member

Mark Gilmore

Fourth Committee Member

Yakov Krasik

Fifth Committee Member

John Leopold

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