Impedance-Matching Network Box of the RF Power Amplifier for the RFT-30 Cyclotron View Full Text


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Article Info

DATE

2018-10

AUTHORS

Ho Seung Song, Young Bae Kong, Eun Je Lee, Min Goo Hur

ABSTRACT

RFT-30 is a 30-MeV prototype cyclotron for radioactive isotope (RI) production, neutron generation, and fundamental research. Charged particles are accelerated by using a radio-frequency (RF) cavity and a high-power RF signal transmitted by an RF amplifier. This paper describes the impedance-matching network box of an RF power amplifier for an RFT-30 cyclotron. The impedance-matching process is an essential procedure for maximizing the RF amplifier’s performance with respect to efficiency and stability. In a dummy load test, the impedance value remains almost constant. However, in terms of beam loading, the impedance varies because of the vacuum and water/air cooling. These effects make the resonance conditions different; thus, the RF amplifier’s operation becomes unstable. In this work, an impedance-matching network box with a stub-line inductor, which is applied to the cathode of the power amplifier (PA) tube, is proposed. A calculation for the impedance-matching network box was performed and then simulated through optimization processes. In addition, the stub-line inductor measurement and the RF performance when using this matching network box are described. More... »

PAGES

1186-1190

References to SciGraph publications

  • 2015-10. Fuzzy-logic-based LLRF control for the RFT-30 cyclotron in JOURNAL OF THE KOREAN PHYSICAL SOCIETY
  • Identifiers

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    http://scigraph.springernature.com/pub.10.3938/jkps.73.1186

    DOI

    http://dx.doi.org/10.3938/jkps.73.1186

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