Conveners
C1Po2C - Argon, Hydrogen, and Nitrogen Systems
- John Weisend (European Spallation Source ESS AB)
- Xilong Wang (European Spallation Source ERIC )
The principal design requirement of cryogenic systems used for liquid argon neutrino detectors is ultra-high purity. The primary impurities that affect operation of the detector are electronegative types such as oxygen and water, or light quenching varieties such as nitrogen. It is the electronegative property of oxygen and water that causes reduced rates in the detection of neutrino...
One, of two, 850,000 gallon liquid hydrogen storage spheres, at NASA’s Kennedy Space Center, was decommissioned in 2010. This tank had an abnormally high heat leak that was investigated and determined to be the result of a large void in the perlite insulation. The insulation void was subsequently filled, and the tank was refurbished for its planned use in the Space Launch System (SLS)...
Fermi National Accelerator Laboratory (FNAL) is developing the international Long-Baseline Neutrino Facility (LBNF) and Deep Underground Neutrino Experiment (DUNE) to advance neutrino science. The flagship of the DUNE project consists of a large particle detector constructed one-mile (1.6 km) beneath the surface at the Sanford Underground Research Facility (SURF) in Lead, SD. The SURF detector...
The NIST Center for Neutron Research (NCNR) operates a 20 MW research reactor that produces neutrons for a suite of 30 neutron scattering instruments. 70% of these instruments use cold neutrons (E < 5 meV), which are moderated by two separate cold neutron sources. The cold moderator for both sources is liquid hydrogen (LH2), which is in turn cooled by a recently commissioned 7 kW, 14K helium...
