"As unique sources of coherent high-power, microwave, and millimeter-wave radiation, gyrotrons are an essential part of the hunt for controlled fusion. They are actively used in many countries for plasma heating and to drive the current in various controlled-fusion reactors." "In this book, designed to introduce non-specialists to this vital field, Gregory S. Nusinovich, an early pioneer and leading authority on the gyrotron, explains their fundamental physical principles. Nusinovich first sets forth some rules of thumb that allow readers to understand gyrotron operation in simple terms. He then explores the fundamentals of the general theory of gyrotrons and offers an overview of the various types of gyro-devices, including gyromonotrons, gyroklystrons, gyro-travelling-wave tubes, and gyrotwystrons. He explains not only the theory, linear and nonlinear, but also the practical challenges that users of such devices face." "This book will be of interest to undergraduate and graduate students, plasma physicists interested in charged-particle dynamics, and applied physicists needing to know more about micro- and millimeter-wave technologies."--BOOK JACKET.