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In this paper, we report the observation of high-current (1.5 kA), magnetically confined, annular electron beams with circumference of -220 mm and wall thickness of ~2 mm and its transportation through the 2 m coaxial beam channel with inner/outer radii of 30 mm/40 mm respectively. The results of the experimental studies of a FEM driven by such an electron beam are presented. The results of FEM lasing...
We present the results of study of a Cherenkov maser based on a 2D periodic lattice used to achieve the desired level of output power while still maintaining the coherence of the output radiation. In this case the large interaction region formed by the periodic lattice allows a moderate power density inside the beam-wave interaction space whilst simultaneously avoiding the formation of electron beam...
Summary form only given. High power millimetre-wave sources which produce coherent radiation (masers) are very important for a number of applications in science and engineering. To observe coherent radiation, the interaction between electrons rotating in a static magnetic field and an electromagnetic wave must take place inside the gyrotron's cavity. The gyrotron is one of the best known broadly applied...
High power millimetre-wave sources operating in W-band (75 GHz-110 GHz) frequency range which are capable of generating coherent radiation at high power up to a few 10s of MWs are important for a number of applications. In order to achieve coherent radiation at high power, the use of an oversized electron beam is required. The use of a 2D periodic lattice was suggested to obtain 2D distributed feedback...
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