Design of a 50 MW, 34 GHz second harmonic coaxial gyroklystron for advanced accelerators
At the University of Maryland, the authors have been investigating the feasibility of using gyroklystrons and gyroklystrons as drivers for linear colliders and advanced accelerators for a number of years. The most recent experimental tube achieved a peak power of about 80 MW at 8.57 GHz with 32% efficiency and over 30 dB gain with a three-cavity first harmonic circuit. The current experimental effort is devoted to producing about 100 MW of peak power at 17.14 GHz with a second-harmonic three-cavity tube. Some schemes for advanced linear colliders with center-of-mass energies of 5 TeV or more expect to require higher frequency sources, perhaps near 35 GHz or 91 GHz. A design study at 95 GHz indicated that peak powers near 7 MW were possible. In this design study, they present the simulated operating characteristics of a four cavity 34 GHz second-harmonic gyroklystron tube which is capable of producing about 60 MW of peak power with an efficiency of about 40% and a gain above 50 dB. The electron gun is a single-anode magnetron injection gun. The input cavity is a TE{sub 011} cavity which is driven at 17 GHz. The remainder of the cavities are TE{sub 021} cavities which interact near the second harmonic of the cyclotron frequency. The gain cavity and the output cavities are at twice the drive frequency, but the penultimate cavity is detuned to enhance efficiency. All cavities are abrupt-transition cavities. Both systems are derived from scaled versions of the 17 GHz tube. In this paper, they present detailed designs and performance predictions for both the electron gun and the microwave circuit.
- Research Organization:
- Univ. of Maryland, College Park, MD (US)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 20067585
- Resource Relation:
- Conference: 1999 IEEE International Conference on Plasma Science, Monterey, CA (US), 06/20/1999--06/24/1999; Other Information: PBD: 1999; Related Information: In: The 26th IEEE international conference on plasma science, 342 pages.
- Country of Publication:
- United States
- Language:
- English
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