Speaker
Dr
John G. Weisend II
(European Spallation Source)
Description
Cryogenics plays an important role at the European Spallation Source, a world class neutron science center, currently under construction in Lund, Sweden. Three principal applications of cryogenics are found at ESS. The SRF cryomodules of the ESS proton linac require cooling at 2 K, 4.5 K and 40 K; the LH2 moderator surrounding the target that produces neutrons, requires cooling via 16 K helium and LHe is required for many of the scientific instruments. These needs will be met by a set of three cryogenic refrigeration/liquefaction plants and an extensive cryogenic distribution system. Significant progress has been made on the ESS cryogenic system in preparation for the expected first beam on target in 2019. This work includes: funding of industry studies for the accelerator cryoplant, detailed design of the cryogenic distribution system, investigation of possible in kind contributors and most importantly, the recruitment of a team of highly qualified cryogenic engineers.
This paper describes the requirements, design solutions and current status of the ESS cryogenic system. The planned recovery of waste heat from the cryogenic plants, a unique aspect of ESS, is described. The procurement of the cryogenic system, expected to be done via a combination of purchase via competitive bids and in kind contributions is also discussed.
Primary author
Dr
John G. Weisend II
(European Spallation Source)
Co-authors
Jaroslaw Fydrych
(ESS)
John Jurns
(ESS)
Dr
Philipp Arnold
(ESS)
Wolfgang Hees
(ESS)
Xilong Wang
(ESS)
