Conveners
Thu-Or14: Instrumentation & Process Control
- Velisa Vesovic (Imperial College London)
The SLAC National Accelerator Laboratory's upgrade to the LCLS-II, featuring a 4 GeV superconducting linear accelerator with 37 cryomodules and two extensive helium refrigeration systems supporting 4 kW at 2.0 K, represents a significant advancement in accelerator technology. Central to this upgrade is a sophisticated 2K system with five stages of centrifugal cold compressors, operating across...
Cryogenic space missions with extremely low temperature experiments such as Herschel, Ariel and Athena present unique challenges on cable assemblies in order to connect electrical devices in a temperature range down to a few millikelvin with those at room temperature. Similar demands are encountered in earthbound telescopes such as ALMA, ELT, and VLT, where large temperature variations...
At ZEA-1 we develop, build and operate, among other things, cryostats for scientific applications to liquefy gases such as hydrogen, e.g. with variable ortho para content for the moderation of neutrons. Further areas of application include Raman spectroscopy and particle image velocimetry (PIV) with cryogenic liquids, testing and calibration of sensors and actuators at cryogenic temperatures...
Superfluid helium (He II) serves as a crucial refrigerant for cooling superconducting resonators, enabling the attainment of remarkably high acceleration gradients in particle accelerators. The presence of quantum vortices in He II attenuates second sound waves and influences heat transfer. Consequently, a comprehensive understanding of the attenuation of second sound waves by quantum vortices...
Microgravity mass gauging has gained increasing importance in recent years due to the acceleration in planning for long term space missions as well as in-space refueling & transfer operations. It is of particular importance with cryogenic propellants where periodic tank venting maneuvers and leak detection place a special emphasis on accurate mass gauging. Several competing technologies have...
