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Volume 2 of the book begins with chapter 6, in which we have taken up conventional MWTs (such as TWTs, klystrons, including multi-cavity and multi-beam klystrons, klystron variants including reflex klystron, IOT, EIK, EIO and twystron, and crossed-field tubes, namely, magnetron, CFA and carcinotron). In chapter 7, we have taken up fast-wave tubes (such as gyrotron, gyro-BWO, gyro-klystron, gyro-TWT, CARM, SWCA, hybrid gyro-tubes and peniotron). In chapter 8, we discuss vacuum microelectronic tubes (such as klystrino module, THz gyrotron and clinotron BWO); plasma-assisted tubes (such as PWT, plasma-filled TWT, BWO, including PASOTRON, and gyrotron); and HPM (high power microwave) tubes (such as relativistic TWT, relativistic BWO, RELTRON (variant of relativistic klystron), relativistic magnetron, high power Cerenkov tubes including SWO, RDG or orotron, MWCG and MWDG, bremsstrahlung radiation type tube, namely, vircator, and M-type tube MILO). In Chapter 9, we provide handy information about the frequency and power ranges of common MWTs, although more such information is provided at relevant places in the rest of the book as and where necessary. Chapter 10 is an epilogue that sums up the authors' attempt to bring out the various aspects of the basics of and trends in high power MWTs.
About the author
Vishal Kesari received an MSc (Physics) degree from Purvanchal University, India, and a PhD (Electronics Engineering) degree from the Institute of Technology, Banaras Hindu University (IT-BHU) (now known as IIT-BHU), India, in 2001 and 2006, respectively. He has worked as a Research Fellow at the Centre of Advanced Study, Electronics Engineering Department, IT BHU, and significantly contributed to sponsored research projects at the Centre of Research in Microwave Tubes, IT-BHU. He served as a lecturer at the Birla Institute of Technology, Ranchi, India, and the Indian Institute of Information Technology, Allahabad, India, before joining as a scientist at the Microwave Tube Research and Development Centre, Defence Research and Development Organisation, Bengaluru, India. His research interests include microwave and millimeter-wave vacuum electronic devices. He has authored two books: (i) Analysis of Disc-loaded Circular Waveguides for Wideband Gyro-TWTs (Lambert Academic Publishing AG & Co., Germany, 2009), and (ii) High Power Microwave Tubes: Basics and Trends (IOP Concise Physics; Morgan & Claypool Publishers, London, 2018) (with B N Basu as the co-author), and numerous research papers in peer-reviewed journals and conference proceedings. He has, to his credit, a number of international and departmental level awards including the DRDO Young Scientist Award, 2012. He has acted as a reviewer for various peer-reviewed journals and conference proceedings. He is a life member of the Vacuum Electronic Devices and Application Society, India.
