GWADW2022 - Approaching the low-frequency design sensitivity of ground-based detectors

Cool-down studies of the low-frequency interferometer in the Einstein Telescope

Not scheduled

2h

GatherTown and ZOOM

Oral presentation Cryogenics for low frequencies Poster session III

Speaker

Lennard Busch (Karlsruhe Institute of Technology (KIT))

Description

The low-frequency interferometer in the Einstein Telescope (ET-LF) shall be operated at temperatures of 10 K to 20 K. One cooling concept provides ultra-low noise cooling for steady-state detector operation using a He-II-filled suspension capillary, in which the heat transport takes place by steady-state heat conduction.
During cool-down, the double-walled capillary enables the flow of single-phase helium to a heat exchanger interface that is coupled by forced convection with the cryogenic infrastructure.
We present a first model of this interface, as well as corresponding thermal and fluid-dynamic numerical simulation results for a transient cool-down process.