Public talk (in German) “Science at the “coolest” place in Hanover”

  • Date: Nov 10, 2025
  • Time: 07:00 PM - 08:30 PM (Local Time Germany)
  • Speaker: Tim Bartelsmeier
  • Location: AEI Hannover, Callinstr. 38, 30167 Hannover
  • Room: Raum 103/106
  • Host: Benjamin Knispel
  • Contact: benjamin.knispel@aei.mpg.de
  • Topic: Discussion and debate formats, lectures
A large technical device made of silver and gold metal in a laboratory. In the background, there are monitors and measuring instruments.
View inside the open superfreezer in the Hanover laboratory. (Image: T. Bartelsmeier / Leibniz University Hanover)
How does a super freezer generate temperatures below -273 °C – and what is it used for?
A dilution cryostat, a type of super-freezer, can reach extremely low temperatures – just a few hundredths of a degree Celsius above absolute zero. Physicists in Hanover are using such a device to investigate, at -273.13 °C, how sources of interference can be reduced in future terrestrial gravitational-wave detectors such as the planned Einstein Telescope. This talk reveals what this special freezer looks like, how it works, and what it is used for.
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