Preliminary Results From The University Of Maryland X-Band Gyroklystron

W. Lawson; J. Calame; M. Skopec; D. Welsh; B. Hogan; M. Naimann; J. Renbaum; M. E. Read

doi:10.1117/12.978416

18 November 1989 Preliminary Results From The University Of Maryland X-Band Gyroklystron

W. Lawson, J. Calame, M. Skopec, D. Welsh, B. Hogan, M. Naimann, J. Renbaum, M. E. Read

Proceedings Volume 1039, 13th Intl Conf on Infrared and Millimeter Waves; (1989) https://doi.org/10.1117/12.978416
Event: 13th International Conference on Infrared and Millimeter Waves, 1987, Honolulu, HI, United States

Abstract

The results of scaling studies for the next generation of linear electron-positron colliders have demonstrated a need for high pulse power, high efficiency, high gain microwave (8-30 GHz) amplifiers.1 As part of our investigation into the suitability of gyrotron amplifiers for this application, we are constructing an X-band gyroklystron which is predicted to achieve a peak power of 30-50 MW2. A schematic of the major subsystems of the initial two-cavity gyroklystron is shown in Fig. 1. The modulator supplies a 500 kV, 200 A, 1.5 its pulse with an intermediate voltage to a double-anode Magnetron Injection Gun (MIG). The MIG generates a rotating beam which passes through the circuit after being adiabatically compressed. The beam's phase-space distribution is modulated by a microwave signal which is injected into the first cavity. Energy is extracted axially through a coupling aperture in the second cavity and travels through a nonlinear waveguide to a half-wavelength output window. The beam expands in the decreasing magnetic field and impinges on a 35 cm section of the output waveguide. A directional coupler and water calorimeter (not shown) measure the peak and average microwave power. The nominal parameters of this configuration are listed in Table I and details of these subsystems are discussed below.

Citation Download Citation

W. Lawson, J. Calame, M. Skopec, D. Welsh, B. Hogan, M. Naimann, J. Renbaum, and M. E. Read "Preliminary Results From The University Of Maryland X-Band Gyroklystron", Proc. SPIE 1039, 13th Intl Conf on Infrared and Millimeter Waves, (18 November 1989); https://doi.org/10.1117/12.978416

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KEYWORDS

Microwave radiation

Waveguides

Dielectrics

Magnetism

Modulators

Diagnostics

Metals

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