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Upgrade of the 88-Inch Cyclotron Power Amplifier

Published online by Cambridge University Press:  08 August 2012

Michel Kireeff Covo
Michel Kireeff Covo*
Affiliation:
Lawrence Berkeley National Laboratory, 1 Cyclotron Road Mail Stop 88R0192, Berkeley, CA 94720, USA. phone: + 1 510 486 7701
*
Corresponding author: M. Kireeff Covo Email: mkireeffcovo@lbl.gov
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Abstract

The radiofrequency (RF) system of the 88-Inch Cyclotron at Lawrence Berkeley National Laboratory is a resonant system based on the quarter-wave cantilever-type resonating structure. Power is fed to the Dee from the anode of the 500 kW RCA 4648 tetrode tube operating in grounded cathode configuration, which is coupled to the side of the Dee stem. The tube is obsolete and makes its continued use impractical. A new final power amplifier was designed and built using the commercially available tube Eimac 4W150,000E. The new amplifier was successfully commissioned and has been reliable and easy to operate.

Keywords

Circuit design and applicationsPower amplifiers and linearizers
Type
Industrial and Engineering Paper
Information
International Journal of Microwave and Wireless Technologies , Volume 4 , Issue 5 , October 2012 , pp. 553 - 558
Copyright
Copyright © Cambridge University Press 2012. This is a work of the U.S. Government and is not subject to copyright protection in the United States.

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References

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