Accelerator Cryogenic Plant (ACCP) for the European Spallation Source ESS

Linde Kryotechnik AG has been awarded the contract for the supply of a cryogenic helium refrigeration plant for the European Spallation Source (ESS) in Lund, Sweden. The equipment will be delivered to Lund in summer 2017 with subsequent installation and start-up of the plant until summer 2018

The European Spallation Source

The European Spallation Source is a multi-disciplinary research center based on the world’s most powerful neutron source. This new facility will be around 30 times brighter than today’s leading facilities, enabling new opportunities for researchers in the fields of life sciences, energy, environmental technology, cultural heritage, and fundamental physics. One core part of the ESS consists of an accelerator delivering protons with 5 MW of power to a target at 2 Giga electron Volts (GeV), which then emits neutrons for respective research. The superconducting part of the accelerator is about 300 meters long and contains up to 58 cryomodules which are operated at 2 Kelvin (- 271.15°Celsius) by using superfluid helium. The cryogenic refrigeration plant supplied by Linde Kryotechnik AG will provide the cooling to the cryomodules and the cryogenic distribution system. Besides a cooling power of 3000 Watt to the superconducting radio frequency cavities of the cryomodules, the cryogenic plant will also supply refrigeration power of 11300 Watt to the thermal shields at around 40 to 50 Kelvin, and 9 g/s liquid helium at 4.5 Kelvin for cooling of the power couplers.

Our Scope of Supply

The compact design of the cryogenic plant consists of three recycle gas compressors operating at ambient temperature and one coldbox which includes Linde Kryotechnik AG’s proprietary expansion turbines as well as cold compressors. To support ESS’ objective of a sustainable research facility, the cryogenic plant is optimized for lowest power consumption and includes heat recovery for the district heating network.

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