Optimal Design of a Coaxial Cavity Based on Quality-Factor Maximization for High-Power Coaxial Magnetron in -Band

MK Joshi, SK Vyas, T Tiwari… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
This paper presents the synthesis of a coaxial cavity for high-power X-band coaxial
magnetron. In the proposed design, cavity parameters corresponding to optimum quality …

Magnetron injection gun for a short pulse, 0.67 THz gyrotron for remote detection of radioactive materials

U Singh, N Kumar, AK Sinha - IEEE Transactions on Terahertz …, 2014 - ieeexplore.ieee.org
In this paper, the design of electron gun for a 0.67 THz gyrotron is presented. The in-house
code MIGSYN is used to estimate the initial gun parameters. The electron trajectory tracing …

Design of 132 GHz gyrotron with 3 GHz tunability for 200 MHz DNP/NMR spectrometer

N Kumar, U Singh, AK Sinha - Infrared Physics & Technology, 2015 - Elsevier
A complete design of 132 GHz gyrotron for 200 MHz DNP–NMR spectroscopy application is
presented in this article. The design is performed considering a frequency tunability range of …

Design and Analysis of 25 kW (CW) Millimeter Wave Source with External Waveguide Mode Converters for Advance Material Heating/Processing

N Kumar, H Khatun, A Mishra… - 2023 IEEE …, 2023 - ieeexplore.ieee.org
The design of millimeter wave source of 28 GHz frequency with 25 kW RF output power is
discussed here. Also the design of waveguide mode converters (rippled wall, serpentine …

Development of 42-GHz, 200-kW gyrotron for Indian tokamak system tested in the regime of short pulselength

A Bera, NK Singh, N Kumar, D Rathi… - … on Plasma Science, 2019 - ieeexplore.ieee.org
A 42-GHz, 200-kW gyrotron was developed and tested for the Indian plasma fusion system.
The gyrotron was designed for the TE 0, 3 operating mode. The configuration of the triode …

RF behavior of a coaxial interaction structure for 0.24-THz, 2-MW gyrotron

N Kumar, A Bera - IEEE Transactions on Electron Devices, 2020 - ieeexplore.ieee.org
The coaxial interaction structure for a 0.24-THz, 2-MW gyrotron is designed, and its RF
behavior is analyzed for the beam current of 60 A and the beam voltage of 90 kV. The …

170-GHz, 2-MW coaxial-cavity gyrotron design for plasma fusion system

N Kumar, U Singh, A Bera… - IEEE Transactions on …, 2018 - ieeexplore.ieee.org
Multimegawatt RF power in millimeter waveband (30-300 GHz) is required in the
magnetically confined plasma fusion reactors. In this paper, the design of 170-GHz, 2-MW …

Inverse magnetron injection gun for megawatt power, sub-THz gyrotron

N Kumar, U Singh, V Gahlaut… - IEEE Transactions on …, 2019 - ieeexplore.ieee.org
Inverse magnetron injection gun (IMIG) provides several advantages over simple MIG
especially in high-power, high-frequency gyrotron. Sub-millimeter (> 230 GHz), high-power …

A feasibility study of beam-wave interaction in 670 GHz gyrotron for radioactive material detection application

N Kumar, U Singh, A Kumar… - Japanese Journal of …, 2012 - iopscience.iop.org
In this article, a feasibility study of 300 kW RF power generation with TE 25, 10 (transverse
electric) operating mode for 670 GHz gyrotron is presented. The beam-wave interaction …

Towards a 1 MW, 170 GHz gyrotron design for fusion application

A Kumar, N Kumar, U Singh, R Bhattacharya… - Infrared Physics & …, 2013 - Elsevier
The electrical design of different components of 1MW, 170GHz gyrotron such as, magnetron
injection gun, cylindrical interaction cavity and collector and RF window is presented in this …