Electromagnetic analysis for the side-coupled cavity-type interaction structure for the linear accelerators

Abstract

The side-coupled cavity (SCC) structure is widely used in Linac, and also finds its application in the high-power microwave tubes. The SCC structure operating under the slow-wave regime, for the π/2 mode in transverse magnetic mode operation, has been electromagnetically analyzed using field-matching technique for the dispersion and interaction impedance characteristics. Furthermore, the effect of different structural parameters on the dispersion and interaction characteristics has been studied. To validate the developed dispersion and interaction relation, the SCC is simulated using commercially available electromagnetic simulation tools. The results obtained through the developed analytical expression are compared with the simulated results, and it is found to be in agreement within 3%. This analysis will help the design engineer to select the approximate accurate parameters before performing the simulation or experimental design. Also, it helps to develop a better understanding about the SCC’s behavior with respect to structural parameter before the simulation.

KEYWORDS:

• High-power microwave (HPM)
• periodic structure
• side-coupled cavity
• slow-wave structure
• reltron

ORCID

Prabhakar Tripathi http://orcid.org/0000-0002-3213-9993

Arjun Kumar http://orcid.org/0000-0001-8630-0183

Correction Statement

This article has been republished with minor changes. These changes do not impact the academic content of the article.

Additional information

Funding

This work was supported by Ministry of Electronics and Information Technology (MeitY), Government of India [Under Visvesvaraya PhD Scheme (VISPHD-MEITY-217)].

Notes on contributors

Prabhakar Tripathi

Prabhakar Tripathi received the BTech degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, India, in 2009, and MTech degree in the Communication System from Graphic Era University, Dehradun, Uttarakhand, India, in 2011. He is currently pursuing a PhD degree in the Department of Electronics Engineering with the Indian Institute of Technology (Banaras Hindu University), Varanasi, India, under the Visvesvaraya PhD Scheme (VISPHD-MEITY-217). His current research interests include Computational electromagnetics, Slow-wave structure, High Power Microwave sources, Metamaterial based HPM Source, Plasma filled HPM source and Metamaterial based applications.

Arjun Kumar

Arjun Kumar received the BTech degree in Electronics and Communication Engineering from Biju Patnaik University of Technology, Odisha, India, in 2013. He is currently pursuing the PhD degree in electronics engineering with Indian Institute of Technology (Banaras Hindu University), Varanasi, India. His current research interests include Computational electromagnetics, High Power Microwave Sources, Metamaterial based applications.

Smrity Dwivedi

Smrity Dwivedi received the BTech degree in Electronics and Communication Engineering from Uttar Pradesh Technical University, Lucknow, India, in 2005, and a PhD degree from IIT (BHU), Varanasi, India, 2013. She joined the Department of Electronics Engineering, IIT (BHU) Varanasi, as an Assistant Professor, in 2017. Her current research interests include modeling, simulation, and design of High-Power Microwave source, Conventional vacuum electronics devices, Metamaterial based applications, Plasmonics and Smart antennas for the new generation. Dr Dwivedi is a senior member of IEEE.

P. K. Jain

P. K. Jain received the BTech degree in electronics engineering and MTech and PhD degrees in microwave engineering from IIT (BHU), Varanasi, India, in 1979, 1981, and 1988, respectively. He has joined as a Lecturer in the Department of Electronics Engineering at the Institute of Technology, Banaras Hindu University in 1981, and became Professor in the Year 2001. Presently, he is Director of the National Institute of Technology, Patna. He has vast experience of R&D in the area of RF and Communication engineering, microwave/millimeter-wave devices and circuits, high power microwave sources, Plasmonics, Metamaterial based applications. Dr Jain is a senior member of IEEE and also a fellow of the Institution of Electronics and Telecommunication Engineers, India.