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Autor: Bender, C., Ferrando, S. E., Gajewski, K., Gonzalez, A. L.

Supermartingales are here defined on a non-probabilistic setting and can be interpreted solely in terms of superhedging operations. The classical expectation operator is replaced by a pair of subadditive operators one of them providing a class of nul

Externí odkaz: http://arxiv.org/abs/2312.14445

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Completion of Testing Series Double-spoke Cavity Cryomodules for ESS

Autor: Kern, R. Santiago, Svanberg, C., Fransson, K., Gajewski, K., Hermansson, L., Li, H., Lofnes, T., Olvegård, M., Profatilova, I., Zhovner, M., Miyazaki, A., Ruber, R.

The FREIA Laboratory at Uppsala University, Sweden, has completed the evaluation of 13 double-spoke cavity cryomodules for ESS. This is the first time double-spoke cavities will be deployed in a real machine. This paper summarizes testing procedures

Externí odkaz: http://arxiv.org/abs/2306.11333

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Accelerator Development at the FREIA Laboratory

Publikováno v: JINST 16 P07039 (2021)

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

Externí odkaz: http://arxiv.org/abs/2103.05265

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First cold test of a crab cavity at the GERSEMI cryostat for the HL-LHC project

Autor: Miyazaki, A., Fransson, K., Gajewski, K., Hermansson, L., Ruber, R.

We tested the prototype DQW cavity in GERSEMI vertical test stand in FREIA. The performance met the specification, and our experimental procedure and infrastructure are qualified for testing crab cavities in the HL-LHC project. This was the critical

Externí odkaz: http://arxiv.org/abs/2011.05210

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Contamination and conditioning of the prototype double spoke cryomodule for European Spallation Source

Autor: Miyazaki, A., Li, H., Fransson, K., Gajewski, K., Hermansson, L., Kern, R. Santiago, Wedberg, R., Ruber, R.

A superconducting Double Spoke Resonator (DSR) is the technology of choice in a low energy section of a high power proton linear accelerator. At the FREIA laboratory in Uppsala University, we have tested two DSRs in a prototype cryomodule for the Eur

Externí odkaz: http://arxiv.org/abs/2005.00761

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