A 0.4-THz Second Harmonic Gyrotron with Quasi-Optical Confocal Cavity
Sign Up to like & getrecommendations! Published in 2017 at "Journal of Infrared, Millimeter, and Terahertz Waves"
DOI: 10.1007/s10762-017-0432-8
Abstract: Mode density is very relevant for harmonic gyrotron cavity. Theoretical investigations suggest that quasi-optical confocal waveguide performs low mode density and good mode-selective character. By selecting the appropriate mode and optimizing the cavity parameters, the… read more here.
Keywords: quasi optical; mode; harmonic gyrotron; gyrotron ... See more keywords
Improving the Efficiency of Quasi-Optical Bragg Reflectors
Sign Up to like & getrecommendations! Published in 2017 at "Radiophysics and Quantum Electronics"
DOI: 10.1007/s11141-017-9733-y
Abstract: In the analysis of propagation of wave beams in quasi-optical transmission lines, the loss rate and transformation of modes by various elements of the transmission line are of great importance. The effects occurring when a… read more here.
Keywords: efficiency quasi; optical bragg; quasi optical; improving efficiency ... See more keywords
A quasi-optical and corrugated waveguide microwave transmission system for simultaneous dynamic nuclear polarization NMR on two separate 14.1 T spectrometers.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of magnetic resonance"
DOI: 10.1016/j.jmr.2018.01.015
Abstract: Nuclear magnetic resonance (NMR) is an intrinsically insensitive technique, with Boltzmann distributions of nuclear spin states on the order of parts per million in conventional magnetic fields. To overcome this limitation, dynamic nuclear polarization (DNP)… read more here.
Keywords: quasi optical; polarization; dnp; polarization nmr ... See more keywords
Unified quasi-optical theory of short-wavelength radiation amplification by relativistic electron beams moving near the impedance surfaces
Sign Up to like & getrecommendations! Published in 2020 at "Physics of Plasmas"
DOI: 10.1063/5.0030914
Abstract: We combine impedance approximation with a quasi-optical approach to describe the amplification of short-wavelength radiation by rectilinear relativistic electron beams (REBs) moving near the impedance surfaces. We consider a number of physical systems in which… read more here.
Keywords: quasi optical; short wavelength; impedance; relativistic electron ... See more keywords
A quasi-optical microwave interferometer for the XuanLong-50 experiment
Sign Up to like & getrecommendations! Published in 2021 at "Journal of Instrumentation"
DOI: 10.1088/1748-0221/16/08/t08011
Abstract: A quasi-optical Mach-Zehnder microwave interferometer operating at 140 GHz has been developed for the ENN's spherical tokamak XuanLong-50 (EXL-50), for the purposes of line-integral electron density measurement and plasma density real-time feedback control input. The… read more here.
Keywords: microwave interferometer; interferometer; interferometer xuanlong; density ... See more keywords
Design of a Multiple-Beam Cassegrain Antenna With Quasi-Optical Isolator at 200 GHz for Target Tracking
Sign Up to like & getrecommendations! Published in 2020 at "IEEE Antennas and Wireless Propagation Letters"
DOI: 10.1109/lawp.2020.3017782
Abstract: This letter proposes a multiple-beam Cassegrain antenna with quasi-optical isolator at 200 GHz for target tracking. The proposed antenna is designed with a special topology, in which a multichannel transceiver feed integrated with a quasi-optical isolator… read more here.
Keywords: beam cassegrain; ghz; optical isolator; multiple beam ... See more keywords
Design of Quasi-Optical Mode Converter for 170-GHz TE32,9-Mode High-Power Gyrotron
Sign Up to like & getrecommendations! Published in 2019 at "IEEE Transactions on Plasma Science"
DOI: 10.1109/tps.2019.2908503
Abstract: In this paper, a design of quasi-optical mode converter for 170-GHz TE32,9-mode high-power gyrotron is presented in detail. The quasi-optical mode converter consists of a launcher and a mirror system. A MATLAB code for analysis… read more here.
Keywords: mode converter; optical mode; quasi optical; power ... See more keywords
Amplification of short-wave radiation based on the resistive instability of a relativistic electron beam (Quasi-optical theory)
Sign Up to like & getrecommendations! Published in 2017 at "Technical Physics"
DOI: 10.1134/s1063784217080114
Abstract: The quasi-optical approach has been used to study the linear and nonlinear stages of instability of an electron beam propagating near a flat boundary of an absorbing medium with dissipative characteristics that can be described… read more here.
Keywords: quasi optical; short wave; resistive instability; electron beam ... See more keywords
All-dielectric metalens for quasi-optical mode and polarization conversion.
Sign Up to like & getrecommendations! Published in 2022 at "Optics express"
DOI: 10.1364/oe.470889
Abstract: Quasi-optical mode conversion technology plays a very important role in the development of high-power terahertz radiation sources. The ability of metamaterials to manipulate wave-front paves a new way in the field of quasi-optical mode conversion.… read more here.
Keywords: dielectric metalens; conversion; optical mode; polarization ... See more keywords