Conveners
C1Po2A - Structures and Contaminants
- Dan Hauser (NASA-Glenn Research Center)
- Kjell Westra (Washington State University)
Epoxy resin plays an important role in the layer insulation of superconducting magnets. The quench phenomenon associated with superconducting magnets often leads to excessive interlayer voltages, which can cause electrical aging of insulating materials. In this paper, tests were conducted to study the tree aging in epoxy resin/BN nanocomposites at 77 K under AC voltages. An experimental...
Compact Accelerator-driven Neutron Sources (CANS), such as the future High Brilliance Neutron Source (HBS), represent an efficient and cost-effective means to provide neutrons for scattering experiments. CANS have a lower neutron production compared to current reactor- or spallation-based neutron sources. However, CANS enable a holistic optimization of the neutron production chain and thus can...
For some years now, massive problems are often occurring when operating standard flow cryostats with pumped liquid helium. There are a large number of reports from various parts of the world, describing blockage problems arising typically within a few hours. Standard equipment for measuring the physical properties at temperatures below 4K is massively affected.
Hydrogen contaminations...
3D printed composites have excellent potential to satisfy needs for lighter and more complex cryogenic materials for aerospace, medical, and other sectors. However, few material property measurements are available. To address this need, this work performs ultimate tensile strength testing of 3D printed thermoplastics immersed in liquid nitrogen at approximately 77 K. Materials tested include...
The work presents the design and validation of a novel cryogenic-compressed hydrogen (CCH2) storage and supply system. This CCH2 system is designed to operate at the pressure up to 20MPa and temperature down to 20K. It is developed to provide an efficient and stable approach to storage and supply hydrogen for heavy trucks, powered by fuel cell stacks. The core strategy of process design and...
In this work, the implementation of residual strains in epoxy resin during its curing process with an operational range of 300 K-400 K and cooling process with an operational range of 15 K-300 K was studied using embedded strain gauges. This represents a significant reduction in the lowest usable temperature of epoxy resin as well as a significant increase in sensitivity of residual strains in...
A heat switch originally developed by ESA/Twente has been modified for use with superfluid helium in the 1 K temperature range as part of a variable temperature insert in an NMR type magnet system. The key challenge was to develop a process that allows to removably contact the additively manufactured switch to a copper surface with nearly no temperature gradient build up. The experiments at GE...
