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- T. Watanabe, Y. Choyal, K Minami, V. L. Granatstein
- Physical review. E, Statistical, nonlinear, andâ€¦
- 2004

The parameter range over which the Rayleigh hypothesis (RH) for optical gratings might be validly applied to analysis of high power backward wave oscillators has been investigated numerically. It hadâ€¦ (More)

- K Minami, Y. Choyal, V. L. Granatstein
- IEEE Transactions on Plasma Science
- 2004

Using the dielectric tensor for a relativistic electron beam with finite strength axial magnetic field, saddle-point analysis for absolute and convective instabilities in the corrugated metal-wallâ€¦ (More)

- Mukesh Kumar Alaria, Sanjay Ghosh, Y. Choyal, Ashok Kumar Sinha, P. K. Jain
- IEEE Transactions on Plasma Science
- 2013

In this paper, beam-wave interaction analysis in a Ka-band periodically ceramic loaded gyrotron traveling-wave tube (gyro-TWT) amplifier is investigated using particle-in-cell (PIC) simulation. Theâ€¦ (More)

- M. K. Alaria, Y. Choyal, A. K. Sinha
- IEEE Transactions on Plasma Science
- 2012

In this paper, the electrical design of the water-edge-cooled single-disk chemical-vapor-deposited-diamond window for the 120-GHz 1-MW gyrotron has been carried out using the CST Microwave Studio.â€¦ (More)

- Y. Choyal, K Minami, V. L. Granatstein
- IEEE Transactions on Plasma Science
- 2004

The linear dispersion relation of a backward-wave oscillator (BWO), derived earlier by the authors, is modified to include effects of RF surface current at the beam-vacuum interface. This modifiedâ€¦ (More)

- Y. Choyal, T. Watanabe, K Minami
- IEEE Transactions on Plasma Science
- 2004

A unified linear dispersion relation that describes both slow- and fast-wave devices excited by a constrained large gyration orbit (LO) monoenergetic electron beam of infinitely small thickness hasâ€¦ (More)

- Lalit Gupta, Y. Choyal, Priya Deshpande, K. P. Maheshwari, K. C. Mittal
- 2008 International Conference on Microwave andâ€¦
- 2008

In this paper, a high power relativistic backward wave oscillator (BWO) experiment is reported. A 230 kV, 2 kA, and 150 ns relativistic electron beam source is developed using a Marx generator. Theâ€¦ (More)

- K. P. Maheshwari, H. Shastri Malav, Y. Choyal
- 2011 IEEE International Vacuum Electronicsâ€¦
- 2011

Analytical and numerical investigation of plasma wave by a relativistic electron beam propagating along the axis of a metallic wave guide in the presence of strong external magnetic field is carriedâ€¦ (More)

- Arvind Nehra, R. K. Gupta, P. C. Panda, S. M. Sharma, Y. Choyal, R. K. Sharma
- IVEC 2012
- 2012

This paper presents the design of an eight beam electron gun using OPERA 3D code for pulsed amplifier. The electron gun has to deliver total current 560 (70Ã—8) mA at voltage 6 kV. Each beam has aâ€¦ (More)

- Nidhi Parmar, Priya Deshpande, Y. Choyal, K. P. Maheshwari, K Subrahmanya Bhat
- 2011 IEEE International Vacuum Electronicsâ€¦
- 2011

A strong axial magnetic field is required to guide a relativistic pulsed electron beam. The magnetic field can be supplied either by a permanent magnet or an electromagnet. In a backward waveâ€¦ (More)