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Description
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 cryogenic system provided by the Long-Baseline Neutrino Facility (LBNF) will regulate the thermohydraulic conditions of the ND LAr detector composed of 35 detector modules, each measuring 1 meter wide, 1 meter long and 3 meter tall. The 35 modules will be arranged in a 7x5 horizontal grid sitting inside a membrane cryostat filled with 310 Ton purified liquid argon. The detector collaboration has cryogenically tested detector a full-scale prototype and a 4-cell scaled version. Experimental results, requirement changes and design updates originated in this test campaign are reported in this paper.