This paper describes the improvement of mission uniformity in magnetron injection guns (MIGs) for gyrotrons, and on an inverted MIG for a Ku band coaxial gyrotron. High-power gyrotrons and gyroklystrons are currently in development for a number of RF applications. The annular electron beams for these devices are created with a MIG operating temperature limited, which means the emission current is a function of the localized temperature. Efficient operation of gyrotrons and gyroklystrons requires a high-quality electron beam with low-velocity spread and uniform current density around the circumference of the beam. Advances in computer modeling allow design of electron guns with velocity spreads less than 8%, which is adequate for efficient operation; however, there is substantial evidence that large azimuthal asymmetries in current emission often occur. This can lead to substantial reductions in device efficiency.
Advanced magnetron injection guns
01.01.2004
105649 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
Advanced Magnetron Injection Guns for Coaxial Gyrotrons and Gyroklystrons
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