Title :
Design and Modeling of a Slow-Wave 260 GHz Tripler
Author :
Makhalov, Petr ; Fedotov, Alexey
Author_Institution :
Inst. of Appl. Phys., Nizhny Novgorod, Russia
Abstract :
The extended-interaction klystron frequency multiplier with a hollow electron beam has been studied numerically as a source of subterahertz radiation with controlled phase. The designs of electrodynamic and electro-optical systems are discussed for the frequency tripler with an output frequency of 260 GHz. The simulations of electron-wave interaction take into account the electron velocity spread, beam interception by a slow-wave structure, and the space charge effects. According to simulations, a two-cavity frequency tripler fed by a 1 W input signal at 86.67 GHz can deliver a maximum output power of about 15 W at a frequency of 260 GHz with a 90 MHz bandwidth (FWHM). Such a device is aimed to pulsed methods of the dynamic nuclear polarization in nuclear magnetic resonance spectroscopy.
Keywords :
electro-optical devices; electrodynamics; frequency multipliers; klystrons; magnetic resonance spectroscopy; millimetre wave devices; nuclear polarisation; slow wave structures; space charge; terahertz wave devices; FWHM; bandwidth 90 MHz; beam interception; dynamic nuclear polarization; electrodynamic system; electron velocity spread; electron-wave interaction; electrooptical system; extended interaction klystron frequency multiplier; frequency 260 GHz; frequency 86.67 GHz; hollow electron beam; nuclear magnetic resonance spectroscopy; power 1 W; pulsed method; slow wave structure; space charge effect; subterahertz radiation; two cavity frequency tripler; Bandwidth; Cavity resonators; Couplings; Electron beams; Harmonic analysis; Periodic structures; Power generation; Electron–wave interaction; frequency multiplication; hollow electron beam; millimeter-wave source; slow-wave structure;
Journal_Title :
Terahertz Science and Technology, IEEE Transactions on
DOI :
10.1109/TTHZ.2015.2470084
