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Un prototype au xénon pour simuler la future unité frigorifique avancée pour le refroidissement de trajectographes au silicium.

A prototype with Xenon to simulate the future advance refrigeration unit for cooling of silicon detector trackers.


The Large Hadron Collider (LHC) will soon undergo the Phase III Upgrade resulting in radiation levels extent never achieved before. Therefore, both detector cooling system and mechanical supports for the future particle trackers should be also upgraded as the current refrigeration technology applying CO2 is not sufficient to avoid the thermal runaway of silicon sensors due to the CO2 triple point temperature (≈ ‐56 deg C). Krypton has been selected as the most promising natural alternative to CO2 for the ultra‐low temperature operating at high‐pressure levels ensuring a clean and efficient cooling inside the sensors and electronics. However, the thermophysical properties of Krypton required the design of a new cooling cycle different to that developed for CO2. Therefore, as a first step of this large study, in order to prove the Krypton cooling cycle concept in laboratory conditions, a small‐scale prototype using Xenon as working fluid was designed and is under construction in Varmeteknisk laboratory at NTNU (Trondheim, Norway). Xenon was selected as its critical temperature and pressure were suitable to emulate the working conditions typical for Krypton‐based detector cooling system while at the same time offered the possibility to analyze the thermal performance and behavior of noble gases in easily attainable temperatures typical for commercial refrigeration (down to – 30 deg C).
In this work, an ejector‐supported cycle with a dedicated almost‐fully passive evaporator loop Xenon was designed and numerically evaluated. The controllability and stability of the cycle, as well as the entering condition, setpoint and cooling rate in the evaporator were the main priorities of the study.

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Pages : 12 p.


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  • Titre original : A prototype with Xenon to simulate the future advance refrigeration unit for cooling of silicon detector trackers.
  • Identifiant de la fiche : 30031758
  • Langues : Anglais
  • Sujet : Technologie
  • Source : Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Date d'édition : 21/08/2023
  • DOI :


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