Tetrode Based Technology Demonstrator at 352 MHz, 400 kWp for ESS Spoke Linac

Rutambhara Yogi, Rolf Wedberg, Lars Hermansson, Konrad Gajeski, Eric Montesinos, Volker Ziemann, Tord Ekelof, Roger Ruber

    Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingpeer-review

    5 Citations (SciVal)


    The European Spallation Source (ESS) will be the world's most powerful spallation neutron source when it comes in operation at the end of this decade. The ESS linac will accelerate 50mA of protons to 2 GeV in 2.86 ms long pulses at a repetition rate of 14 Hz on a tungsten target for neutron spallation. The linac contains 26 superconducting spoke cavities, which are being developed by IPN Orsay, France, and which accelerate the protons from 90 to 220 MeV. The FREIA laboratory at Uppsala University (Sweden) has developed the required RF power sources, procured the RF distribution and will test the cavities at nominal power. As no suitable amplifier was available at the ESS specifications (352MHz, 400kWp / 20kWavg, pulse width = 3.5 ms, pulse repetition frequency = 14 Hz), various technologies were compared and tetrode technology was selected for the first technology demonstrator RF power station at FREIA. We discuss the design of the technology demonstrator and present the first test results.
    Original languageEnglish
    Title of host publicationIEEE International Vacuum Electronics Conference
    PublisherIEEE - Institute of Electrical and Electronics Engineers Inc.
    Publication statusPublished - 2014
    Event15th IEEE International Vacuum Electronics Conference - Monterey, CA
    Duration: 2014 Apr 222014 Apr 24


    Conference15th IEEE International Vacuum Electronics Conference

    Subject classification (UKÄ)

    • Natural Sciences
    • Physical Sciences


    • Tetrode
    • RF power station
    • ESS
    • technology demonstrator


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