Status of LBNF/DUNE near site liquid argon proximity and external cryogenics systems development.

Conference · Sat Jan 01 00:00:00 EST 2022 · IOP Conf.Ser.Mater.Sci.Eng.

DOI:https://doi.org/10.1088/1757-899X/1240/1/012084· OSTI ID:1877629

Creus Prats, J. ^[1]; Montanari, D. ^[1]; Adamowski, M. ^[1]; Cline, G. ^[2]; Matichard, F. ^[2]; Delaney, M. ^[1]; Lawrence, A.  ^[2]

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1. Fermilab
2. LBL, Berkeley

The Deep Underground Neutrino Experiment (DUNE) near site located at Fermilab will host the neutrino beam complex. It includes a high voltage liquid argon time projection chamber located 60-meter underground used as beamline instrumentation. The LAr cryogenic system provided by the Long-Baseline Neutrino Facility (LBNF) regulates thermohydraulic conditions of the membrane cryostat hosting the detector with 285 Ton purified LAr. The purification system uses molecular sieve and copper oxide pellets to manage the argon contamination below 100 ppt (parts per trillion) oxygen equivalent. The detector and its cryogenics are capable to move a stroke of 30 meters on/off beam. The cryogenic system modes of operation include the cryostat pressure test, purge in open loop, detector cooldown, cryostat fill, closed loop purification, liquid empty, and purification system activation/regeneration process. The system design status and schedule, and technical details such as operating modes and interfaces are reported in this paper.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 1877629
• Report Number(s): FERMILAB-CONF-22-502-LBNF-TD; oai:inspirehep.net:2105109
• Journal Information: IOP Conf.Ser.Mater.Sci.Eng., Vol. 1240
• Country of Publication: United States
• Language: English

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