Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 43: Poster session Particle Physics

T 43.13: Poster

Tuesday, March 31, 2020, 17:00–18:30, Grotte

A cryogenic heat pump for the radon removal system of XENONnT — •Philipp Schulte, Christian Huhmann, Michael Murra, Denny Schulte, and Christian Weinheimer for the XENON collaboration — Institut für Kernphysik, WWU Münster

In order to lower intrinsic radioactive contaminants in xenon a new radon removal system is being developed and built for the XENONnT Dark Matter detector. The high-flux radon removal system makes use of crygenic distillation based on the difference in vapor pressure between radon and xenon. In order to have a thermodynamically efficient system, a custom-made heat exchanger will be used with xenon as the working gas. As liquefaction of xenon is envisioned, a cryogenic heat pump with high throughput is needed. This is realized as a radon-free, ultra-clean compressor with the absence of oil-based lubrication.

This poster will show the basic concept of the XENONnT radon removal system focussing on the heat pump concept.

The project is funded by BMBF under contract 05A17PM2.