Accelerator Development at the FREIA Laboratory
R. Ruber, A.K. Bhattacharyya, D. Dancila, T. Ekel\"of, J. Eriksson, K., Fransson, K. Gajewski, V. Goryashko, L. Hermansson, M. Jacewicz, M. Jobs,, \AA. J\"onsson, H. Li, T. Lofnes, A. Miyazaki, M. Olveg{\aa}rd, E. Pehlivan,, T. Peterson, K. Pepitone, A. Rydberg, R. Santiago Kern

TL;DR
The FREIA Laboratory at Uppsala University specializes in superconducting accelerator technology, developing test facilities and components to support major European research infrastructures like ESS, CERN, and MAX IV.
Contribution
The paper details the development of innovative test facilities and high-power RF amplifiers for superconducting accelerators, advancing experimental capabilities.
Findings
Successful testing of accelerating and crab cavities in new cryostats
Development of high-power vacuum tube RF amplifiers
Progress in solid-state RF amplifier technology
Abstract
The FREIA Laboratory at Uppsala University focuses on superconducting technology and accelerator development. It actively supports the development of the European Spallation Source, CERN, and MAX IV, among others. FREIA has developed test facilities for superconducting accelerator technology such as a double-cavity horizontal test cryostat, a vertical cryostat with a novel magnetic field compensation scheme, and a test stand for short cryomodules. Accelerating cavities have been tested in the horizontal cryostat, crab-cavities in the vertical cryostat, and cryomodules for ESS on the cryomodule test stand. High power radio-frequency amplifier prototypes based on vacuum tube technology were developed for driving spoke cavities. Solid-state amplifiers and power combiners are under development for future projects. We present the status of the FREIA Laboratory complemented with results of…
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