Slow-wave Devices Research Articles

Theory and conceptual design of a high-power highly efficient magnicon at 10 and 20 GHz

It is shown that magnicons can be scaled up to high frequency (X-band and above) at high power and efficiency. Magnicons have an advantage over other slow wave devices in that the structure sizes are comparable to or larger than a wavelength, so RF breakdown should be less of a problem. However, they require higher voltage. The magnicon has the promise of considerably enhancing the technology of efficient high-power high-frequency RF sources. >

Lower hybrid resonance and parametric decay excited by a slow-wave device

Lower hybrid resonance and parametric decay excited by a slow-wave device

Microwave Helices in Electron Spin Resonance Studies at High Pressure or Very Stable Temperatures

Special purpose ESR systems which make use of helical slow wave devices are described. One such system can be used to study liquids at pressures in excess of those employed in ordinary cavity systems. An ESR cell with temperature fluctuations and gradients of less than 10−3°C is also described.

Dielectric slow-wave structures for the generation of power at millimeter and submillimeter wavelengths

Several new types of coupling structures, designed to extract energy from a megavolt electron beam at a harmonic of the frequency used to modulate the beam current, are considered. In particular, the advantages of a slow-wave device over a right cylindrical cavity are indicated. The slow-wave coupling device may be resonant or nonresonant; the latter corresponds to a Cerenkov radiator. Power measurements at the twelfth harmonic of the fundamental modulating frequency provide good correlation with the theoretical power output expected. The design of a submillimeter coupling device is described, and the theoretical pulsed power obtainable is shown to be at the milliwatt level for a harmonic current density of 74 ma/cm2.