Conveners
C2Po2B - Motors and Devices
- Wolfgang Stautner (GE Global Research)
- John Brisson (MIT)
To improve measuring sensitivity of an IR detector in spacecrafts, it should be cooled down to cryogenic temperature in a limited space and zero gravity environment, connected to a cryocooler. For the heat transfer from the sensor to the cryocooler, a cryogenic loop heat pipe (CLHP) can be used due to its efficient heat transfer performance and reliability without using mechanically moving...
In this research the performances of nitrogen cryogenic heat pipes with different wick structures were compared under the condition of a wide range of heat load and several filling ratios. The heat pipes tested are commercially available ones, which are originally designed for room temperature applications using water as a working fluid. For the present research working fluid, water, was...
The SC100H linear Stirling cryocooler is designed by Kunming Institute of Physics. The characteristics of the magnetic circuit of the moving magnet linear oscillation motor used in SC100H was analyzed by the theoretical and experimental methods. In this study, a theoretical model of the motor was established, and its structure was simplified for easy analysis and calculation. Using the...
With the development of cryogenics, the demand of cryogenic liquid increases constantly. However, there are some difficulties to control and to adjust the extraction of cryogenic liquid especially for liquid helium. Compared with the immersed pump, the ejector has huge advantages in pumping the cryogenic liquid from cryogenic dewar, like stable operation and simple structure. Considering the...
In several scientific application, where cryogenics is used to cool down cavities or superconductive magnets, ionizing radiation can occur. Ionizing radiation accelerates the aging process of organic materials and leads to a degradation of semiconductors.
Nonetheless, cryogenic applications in high physics facilities require a precise and reliable control of the flow, the temperature and the...
Adsorption behavior of helium on activated carbon is expected to be used in the regenerator of 4-K class cryocoolers to improve the performance of the refrigerator. Since the amorphous carbon structure based on graphite slice is closer to the actual activated carbon, we use Grand Canonical Monte Carbo (GCMC) method to simulate the adsorption of helium on the amorphous carbon in low...
