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.
magnetron, split cathode, long pulse, high power microwaves, HPM, relativistic
ONR Grant No. N00014-19-1-2155 and Verus Research Subcontracts Nos. 1112-00045 and 1130-00055
Level of Degree
Electrical and Computer Engineering
First Committee Member (Chair)
Second Committee Member
Third Committee Member
Fourth Committee Member
Fifth Committee Member
Kuskov, Artem. "RELATIVISTIC MAGNETRON WITH DIFFRACTION OUTPUT AND SPLIT CATHODE." (2022). https://digitalrepository.unm.edu/ece_etds/528