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international vacuum electronics conference | 2014

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; T. Ekelof; Roger Ruber

The European Spallation Source (ESS) will be the worlds 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.


5th Int. Particle Accelerator Conf. (IPAC'14), Dresden, Germany, June 15-20, 2014 | 2014

The New FREIA Laboratory for Accelerator Development

R. J. M. Y. Ruber; Anirban Bhattacharyya; Dragos Dancila; T. Ekelof; K. Fransson; Konrad Gajewski; Vitaliy Goryashko; Lars Hermansson; M. Jacewicz; Tor Lofnes; Maja Olvegård; Anders Rydberg; Rocio Santiago Kern; Rolf Wedberg; Rutambhara Yogi; Volker Ziemann


IPAC'15, the sixth International Particle Accelerator Conference, Virginia, USA, May 3-8, 2015 | 2015

PROGRESS AT THE FREIA LABORATORY

Maja Olvegård; Anirban Bhattacharyya; Dragos Dancila; T. Ekelof; Johan G. Eriksson; K. Fransson; Konrad Gajewski; Vitaliy Goryashko; Lars Hermansson; Michael Holz; M. Jacewicz; Magnus Jobs; Åke Jönsson; Han Li; Tor Lofnes; Harald Nicander; Roger Ruber; Anders Rydberg; Rocio Santiago Kern; Rolf Wedberg; Volker Ziemann; Ruthambara Yogi


Archive | 2012

Selection of RF Power Source and Distribution Scheme at 352 MHz for Spoke Cavities at ESS and FREIA

Rutambhara Yogi; Rolf Wedberg; Vitaliy Goryashko; Rocio Santiago-Kern; Lars Hermansson; Tor Lofnes; Konrad Gajewski; Dragos Dancila; Anders Rydberg; Volker Ziemann; T. Ekelof; Roger Ruber


5th Int. Particle Accelerator Conf. (IPAC'14), Dresden, Germany, June 15-20, 2014 | 2014

Solid-State Amplifier Development at FREIA

Dragos Dancila; Aleksander Eriksson; Vitaliy Goryashko; Linus Haapala; Roger Ruber; Anders Rydberg; Rolf Wedberg; Rutambhara Yogi; Volker Ziemann


Archive | 2012

Proposal for Design and Test of a 352 MHz Spoke RF Source

Vitaliy Goryashko; Dragos Dancila; T. Ekelof; Konrad Gajewski; Lars Hermansson; Niklas Johansson; Tor Lofnes; Masih Noor; Roger Ruber; Anders Rydberg; Rocio Santiago-Kern; Rolf Wedberg; Rutambhara Yogi; Volker Ziemann


Archive | 2017

DB Science 400 kW RF Station Site Acceptance Test

Magnus Jobs; Rolf Wedberg; Konrad Gajewski


8th Int. Particle Accelerator Conf. (IPAC'17), Copenhagen, Denmark, 14–19 May, 2017 | 2017

352 MHz Tetrode RF Stations for Superconducting Spoke Cavities

Magnus Jobs; Konrad Gajewski; Vitaliy Goryashko; Han Li; R. J. M. Y. Ruber; Rolf Wedberg


GigaHertz Symposium | 2016

High Power Microwave Technology in ESS a FREIA

Magnus Jobs; Rolf Wedberg; Ruber Roger; Dragos Dancila


Archive | 2015

Itelco-Electrosys 400 kW RF Station Site Acceptance Test

Magnus Jobs; Rolf Wedberg; Konrad Gajewski

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