Rajanish Kumar Singh, M. Thottappan
The present gyrotron is designed to operate in TE 7,2 mode at 260 GHz for studying its beam-wave interaction behavior and its tunability for dynamic nuclear polarization/nuclear magnetic resonance (DNP/NMR) application. The operating frequency of the gyrotron is sensitive to the physical dimensions of the RF interaction circuit, which can deform due to ohmic loss-related temperature. Therefore, combined magnetic and thermal tuning schemes are utilized to control this deformation and enhance the tunability of the millimeter-wave gyrotron. A 3-D particle-in-cell simulation technique is employed to investigate the beam-wave interaction behavior of the gyrotron, which is validated with a multi-mode nonlinear code. Structural deformation and thermal studies are conducted using a finite-element method based ANSYS. The implementation of combined magnetic tuning and water coolant-based thermal tuning schemes results in a tunable bandwidth for the gyrotron of approximately 1.88 GHz, which represents a 44.60% improvement compared to the bandwidth attainable through magnetic field variation alone.
@article{6c7aab4b-6c33-497e-9316-39b6d507efe2,
title={Simulation Investigations and Optimizati},
author={Rajanish Kumar Singh and M. Thottappan},
year={2026},
language={en}
}TY - JOUR TI - Simulation Investigations and Optimizati AU - Rajanish Kumar Singh AU - M. Thottappan PY - 2026 LA - en ER -
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