Conveners
C2Po1F: Miscellaneous I
- Michael White (Fermi National Accelerator Laboratory)
- Greg Tatkowski (Fermi National Accelerator Laboratory)
Noble Liquid Test Facility (NLTF) at Fermilab is dedicated to the research and development of liquid argon neutrino detectors. The liquid argon is provided by a small cryogenic system supplying four cryostats. Multiple modifications of the cryogenic system over the years resulted in limited performance with respect to the liquid argon flow rate. The time required to fill the cryostats has...
A proposed design for the removal of impurities with high electronegativity from liquid argon for the purpose of neutrino detector research is described. The design will utilize a commercially available submersible, cryogenic pump to circulate liquid argon through an external filter containing molecular sieve and activated copper media, removing water and oxygen, respectively. The existing...
Hydrogen thermoacoustic instabilities are a relatively unexplored but promising opportunity for cryocooler development. This article describes a new research cryostat developed to investigate hydrogen as a working fluid in thermoacoustic systems. The cryostat is a modular, turbo-molecular pump driven, vacuum chamber with a 4.2 K pulse-tube cryocooler capable of 45 W of cooling at 50 K. To...
The Leidenfrost effect is a phenomena manifested by a liquid droplet interacting with a surface that is considerably hotter than the boiling point of the droplet resulting in a thin vapor layer separating the droplet-surface pair. This phenomena also occurs between a droplet and a superheated immisible liquid pair, for example a liquid nitrogen droplet in a pool of water. Due to the...
As a good paramagnetic material with low magnetic ordering temperature, CPA is often used in the study of ADR. A typical ADR consists of a multitude of components such as the salt pill, superconducting magnets, heat switch, etc. To study the performance of CPA in the single-stage ADR, an experimental system had been built. It used a two-stage GM refrigerator to provide ADR with a...
Advances in 3D printing are disruptive opportunities for material selection and component design in cryogenics. However, thermophysical property measurements for these novel materials are generally unavailable at cryogenic temperatures. This experiment explores the variation in thermal conductivities due to print direction of two aluminium composites (AlSi10Mg and Al6061-RAM). The direct...
The temperature coefficient of resistivity is a critical element of many AC-based hot-wire measurements of thermal properties. At cryogenic temperatures, most metallic materials suitable for wire and film-based forms have either a temperature coefficient or absolute resistivity that is too small to enable practical, accurate measurements. Invar (36% Ni 64% Fe) controlled thermal expansion...
As part of the energy transition, the off-shore wind power market is booming with many very large-scale projects emerging or already in operation in Europe, Asia and America. Wind farms are commonly made up of several dozen turbines, the power of which has steadily increased in recent years, now exceeding more than 10 MW each, or soon even beyond.
Installed more than 150 meters above the...
