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Transport of high current (∼kA range with particle energy ∼1 MeV) planar electron beams is a topic of increasing interest for applications in high-power (1–10 GW) and high-frequency (10–20 GHz) microwave devices such as backward wave oscillator (BWO), klystrons, gyro-BWOs, etc. In this paper, we give a simulated result for transport of electron beams with velocity ...
In an effort to achieve higher power RF source performance, designers are utilizing distributed beam devices, such as sheet beams and multiple beams. The desire is to develop distributed beam devices that utilize fundamental mode cavities in the RF circuit. A limitation is the amount of current that can be emitted by the cathode while still achieving long cathode lifetimes. For multiple beam devices...
In an effort to achieve higher power RF source performance, designers are utilizing distributed beam devices, such as sheet beams and multiple beams. A limitation is the amount of current that can be emitted by the cathode while still achieving long cathode lifetimes. The desire is to develop distributed beam devices that utilize fundamental mode cavities in the RF circuit. For multiple-beam devices,...
Iterative computational design of asymmetrical electron beam devices, such as sheet beam and multiple beam klystrons, requires 3D analysis involving complex geometries. Manual, iterative design is extremely difficult and impractical for all but the simplest devices. Computer optimization tools and techniques are described that provide automated design of these devices using common personal computers...
We investigate the application of sheet beams to slow wave sources as a means to increase output power. Our interest is for compact vacuum electronic devices in the millimeter and submillimeter regimes. We consider previous work done on orotrons, clinitrons & backward wave oscillators, and investigate methods to enhance operation into the submillimeter region of the spectrum. We use MICHELLE to...
The following topics are dealt with: traveling wave tubes; windows and dielectrics; electron gun design; scandates; space communications and linearization; klystrons; gun/collector design; electron emission; THz technology; thermionic sources; multibeam klystrons; gyrotrons; backward wave oscillators and microfabrication; photoemission and secondary emission; codes and optimization; slow MM-wave structures;...
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