Resonant transformation of modes in oversize electrodynamic systems

Malygin, S. A.; Pavel’ev, V. G.; Tsimring, Sh. E.

doi:10.1007/bf01039282

Cited by 9 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, for gyrotrons, not only efficiency is important-we must care about mode purity. The effects of mode transformation on the nonuniform section of a waveguide were analyzed based on the method of plane cross sections (PCSs) [27], [28]. The transverse electric and magnetic fields are decomposed according to the system of TE and TM modes in regular reference waveguides.…”

Section: Numerical Investigation Of Cavity Profile Influence On Tmentioning

confidence: 99%

Analysis of the Possibilities to Control Diffraction Quality Factors of the Cavities of Subterahertz Gyrotrons

Zuev

Sedov

Semenov

et al. 2020

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Manufacturing of cylindrical cavities for shortwavelength gyrotrons is usually performed with micrometerscale precision. In subterahertz (sub-THz) and terahertz (THz) gyrotrons, this often results in the fabrication of slightly up-tapered cavities instead of the cavities having the central parts of a constant radius. Correspondingly, the diffractive quality factors (Q D-factors) of such slightly conical cavities may differ from those calculated for the cavities with constant radius central parts. We show that the sensitivity of Q D-factors to the cavity fabrication can be mitigated by introducing some local nonuniformities at the end of a slightly conical up-tapered section of the cavities. The proposed approach is illustrated with an example of a gyrotron designed for spectroscopic applications and having an output radiation power of tens of watts at the frequency of 0.527 THz. This article presents some numerical modeling results, which show how proposed local nonuniformities reduce the sensitivity of Q D-factors to defects in fabrication.

show abstract

Section: Numerical Investigation Of Cavity Profile Influence On Tmentioning

confidence: 99%

Analysis of the Possibilities to Control Diffraction Quality Factors of the Cavities of Subterahertz Gyrotrons

Zuev

Sedov

Semenov

et al. 2020

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

show abstract

“…In addition, such a system can provide a higher transverse selectivity for some operating modes than the conventional gyrotron cavities due to the diffraction rarefying of the mode spectrum in relatively short sections. Despite of these advantages, the gyrotron with coupled cavities has not yet been tested in the experiment in its originally proposed form, although a radical development of this idea in the form of coupled cavities with mode transformation has been Manuscript successfully demonstrated [4], [5], and such a geometry is sometimes exploited to improve the mode selectivity. Recently, a new original version of the sectioned cavity and a new type of solution was proposed in [6]- [8], where it was theoretically shown that a wide waveguide insertion between two parts of a gyrotron cavity (a wide drift waveguide) can also essentially reduce ohmic losses due to the higher group velocity of the waves in this region.…”

Section: Introductionmentioning

confidence: 99%

A Long Cavity With Reduced Diffraction <inline-formula> <tex-math notation="LaTeX">$Q$ </tex-math></inline-formula> for Subterahertz and Terahertz Gyrotrons

Moshe

Bratman

Einat

2015

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

A promising modification of the gyrotron cavity with a little bit wider and fairly long insertion (drift section) into the regular cylindrical part has been studied, both analytically and numerically, by means of both solution of the well-known nonuniform string equation and direct solution of Maxwell equations based on the CST Microwave Studio code. It has been shown that relatively low ohmic losses and an axial field structure that is favorable for the achievement of a high gyrotron efficiency can, in principle, be provided in such a sectioned cavity in the cases of transparent and strongly reflecting drift sections. The decrease in ohmic losses is stronger for the second case because of the smaller amplitude of the wave with a high group velocity in the drift section, but the separation between the operating mode and the closest spurious axial mode is larger for the first case.

show abstract

A Novel Complex Cavity for Second-Harmonic Subterahertz Gyrotrons: a Tradeoff Between Engineering Tolerance and Mode Selection

Shcherbinin

Tkachova

Maksimenko

et al. 2022

J Infrared Milli Terahz Waves

View full text Add to dashboard Cite

Resonant transformation of modes in oversize electrodynamic systems

Cited by 9 publications

References 1 publication

Analysis of the Possibilities to Control Diffraction Quality Factors of the Cavities of Subterahertz Gyrotrons

Analysis of the Possibilities to Control Diffraction Quality Factors of the Cavities of Subterahertz Gyrotrons

A Long Cavity With Reduced Diffraction <inline-formula> <tex-math notation="LaTeX">$Q$ </tex-math></inline-formula> for Subterahertz and Terahertz Gyrotrons

A Novel Complex Cavity for Second-Harmonic Subterahertz Gyrotrons: a Tradeoff Between Engineering Tolerance and Mode Selection

Contact Info

Product

Resources

About