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This report presents an update of the experimental achievements published in the review "State- of-the-Art of High-Power Gyro-Devices and Free Electron Masers", Journal of Infrared, Millime-ter, and Terahertz Waves, 41, No. 1, pp 1-140 (2020) related to the development of gyro-devices (Tables 2-34). Emphasis is on high-power gyrotron oscillators for long-pulse or continuous wave (CW) operation and pulsed gyrotrons for any applications.

Gyrotrons.

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This report gives an update of the worldwide experimental achievements in the development of long-pulse gyrotron oscillators for fusion plasma heating, plasma diagnostics and materials processing. In addition, this work gives a short overview of the present development status of coaxial-cavity multi-megawatt gyrotrons, gyrotrons for technological and spectroscopy applications, relativistic gyrotrons, quasi-optical gyrotrons, cyclotron autoresonance masers, gyro-amplifiers, gyro-BWO's, free electron masers and of vacuum windows for such high-power mm-wave sources.

Gyrotrons.

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This report surveys the development of high-power cyclotron resonance masers (CRM) and gyrotrons in the Soviet Union, based on Soviet open-source literature. It deals with the nature and history of relativistic CRM devices; provides a sequence of the most important issues of gyrotron research and development as perceived by Soviet authors; and discusses individual Soviet research groups, the basic organizational units responsible for the CRM and gyrotron research and development. The study suggests, among other things, that high-power relativistic microwave electronics is one of the most successful areas of Soviet R & D. It has maintained a consistent record of significant achievements; it has managed to overcome the systemic weakness of the Soviet R & D system in being able to translate effectively the results of advanced research into production of practical equipment; and it has become the fastest growing area of application of pulsed power technology, which itself has been for many years the subject of priority development in the Soviet Union.

Gyrotrons --- Research

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Dieser Bericht geht auf den experimentellen Stand von Hochleistungs-Gyrotron-Röhren für verschiedene Anwendungen ein. Außerdem wird über frequenzdurchstimmbare Gyrotrons, Multi-MW-Gyrotrons mit koaxialem Resonator, Gyrotrons für technologische und spektroskopische Anwendungen, relativistische Gyrotrons, Zyklotron-Autoresonanz-Maser, Gyroklystrons, Gyro-TWT-und Gyrotwystron-Verstärker, Gyro-RWO, Gyro-Harmonische-Konvertoren Gyro-Peniotrons, Magnicons, und Frei-Elektronen-Maser berichtet. This review gives an update of experimental achievements of high-power gyrotrons for various applications. In addition, this work gives an overview of the status of frequency tunable gyrotrons, coaxial-cavity multi-MW gyrotrons, gyrotrons for technological and spectroscopy applications, relativistic gyrotrons, cyclotron-autoresonance-masers, gyroklystrons, gyro-TWT amplifiers, gyrotwystron amplifiers, gyro-BWO's, gyroharmonic converters, gyropeniotrons, magnicons, and free electron masers.

Masers. --- Microwave heating. --- Free electron lasers. --- Gyrotrons.

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This report reviews the current experimental state-of-the-art of megawatt-class gyrotrons for fusion plasma heating. In addition, it summarizes the status of frequency-tunable gyrotrons, multi-megawatt gyrotrons with coaxial resonator, gyrotrons for technological and spectroscopic applications, relativistic gyrotrons, cyclotron-autoresonance-masers, gyroklystrons, gyro-TWT-and gyrotwystron-amplifiers, gyro-BWOs, gyro-harmonic-convertors gyro-peniotrons, magnicons, and free-electron-masers.

Masers. --- Microwave heating. --- Free electron lasers. --- Gyrotrons.