A review on the applications of high power, high frequency microwave source: Gyrotron

N Kumar, U Singh, TP Singh, AK Sinha - Journal of fusion energy, 2011 - Springer
The gyro oscillators or simply gyrotrons are used in a variety of applications where high
electromagnetic power is required at millimeter/submillimeter wave frequencies. The …

Design of 95 GHz, 100 kW gyrotron for active denial system application

N Kumar, U Singh, A Kumar, AK Sinha - Vacuum, 2014 - Elsevier
The design work of 95 GHz, 100 kW gyrotron for Active Denial System (ADS) application is
reported in this manuscript. The mode selection is performed considering the various …

Design of 42 GHz gyrotron for Indian fusion tokamak system

U Singh, N Kumar, H Khatun, N Kumar, V Yadav… - Fusion Engineering and …, 2013 - Elsevier
In this paper, the complete design of a 42 GHz, 200 kW gyrotron at first harmonic operation
for Indian tokamak system is presented. The gyrotron is designed for TE 0, 3 operating …

Design of 35 GHz gyrotron for material processing applications

N Kumar, U Singh, A Kumar, H Khatun, TP Singh… - Progress In …, 2011 - jpier.org
The complete design of 35 GHz, 200 kW gyrotron for various material processing and
heating applications is presented in this article. The components of the device, such as …

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 …

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 …

Suppression criteria of parasitic mode oscillations in a gyrotron beam tunnel

N Kumar, U Singh, TP Singh, AK Sinha - Physics of Plasmas, 2011 - pubs.aip.org
This paper presents the design criteria of the parasitic mode oscillations suppression for a
periodic, ceramic, and copper loaded gyrotron beam tunnel. In such a type of beam tunnel …

Millimeter wave TE10 to TE01 mode transducer for electron cyclotron resonance heating applications

P Bhatt, A Patel - International Journal of RF and Microwave …, 2019 - Wiley Online Library
In this manuscript, a new design approach is proposed for□ TE10 (rectangular) to○ TE01
(circular) mode transducer for electron cyclotron resonance heating (ECRH) applications …

Numerical design and analysis of parasitic mode oscillations for 95 GHz gyrotron beam tunnel

N Kumar, U Singh, V Yadav, A Kumar… - Infrared Physics & …, 2013 - Elsevier
The beam tunnel, equipped with the high lossy ceramics, is designed for 95GHz gyrotron.
The geometry of the beam tunnel is optimized considering the maximum RF absorption …

Particle-in-Cell Algorithm-Based Computation of Time-Dependent-Multimode Behavior of 42-GHz Gyrotron

N Kumar, A Bera - IEEE Transactions on Plasma Science, 2021 - ieeexplore.ieee.org
The analysis of the multimode behavior of the interaction cavity for 42-GHz gyrotron is
presented here. The in-house developed codes single-mode cold cavity solver (SMCCS) …