Acceptance Tests of Cryo Modules

Coordinating university or institute

Uppsala University,



Project description

A part of the linear accelerator for the European Spallation Source being built in Lund will contain thirteen cryo-modules that host two superconducting spoke cavities each. Before lowering them into the tunnel for the final assembly, they need to be fully tested and validated under cryogenic conditions and at high power to ensure they will meet the requirements once they are in operation.




Uppsala University:

  • R. Santiago Kern, Research engineer, cryogenics and vacuum
  • Han Li, Researcher, radio-frequency and cavity testing
  • Rolf Wedberg, Research engineer, radio-frequency power amplifiers
  • Roger Ruber, Researcher, project leader

Core deliverables

  • Definition of a test plan
  • Procedure for formal acceptance of a cryomodule
  • Mechanical, electrical and vacuum checks of each cryo-module after arrival
  • Cryogenic cooldown
  • High power radio-frequency tests
  • Radiation monitoring
  • All pertaining documentation such as test reports

Total budget

EUR 5 million


Procurement codes

Civil engineering, building and technical services
Electrical Engineering and magnets
Electronics and radio frequency
Information technology
Mechanical Engineering and raw materials
Vacuum and low temperature
Particle and photon detectors
Gases, chemicals, waste collection and radiation equipment
Health, safety and environment

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