Speaker
Description
The dark matter experiment XENONnT utilizes about 8.6 tonnes of liquid
xenon for the direct search of Weakly Interacting Massive Particles (WIMPS) and other rare event searches, employing a dual-phase Time Projection Chamber (LXe TPC).
In order to reach world-leading senstivities for the several physics channels, the target material xenon needs to be ultra-pure. Electrogentive impurities such as oxygen can absorb or capture the created photons and electrons after a particle interaction inside the detector, diminishing the potential dark matter signals. Additionally, radioactive contaminants such as Kr-85 and Rn-222 can mimic signal events and are the main source of background in XENONnT.
This talk will present the different purification techniques developed for XENONnT to produce the purest xenon on Earth leading to the lowest background in an operating LXe TPC.
