Latest results from XENON1T and future prospects for XENONnT

In the current state of rare-event searches such as direct dark matter detection, liquid xenon dual-phase Time Projection Chambers (TPC) are one of the leading technologies. Indeed, the current most stringent limit has been set on the spin-independent WIMP-nucleon cross-sections by the XENON1T detector. For these searches, background control and reduction are critical and several strategies have been adopted to tackle this issue. Materials are screened and selected for radio-purity, detector manufacturing is tightly controlled and surface cleaning techniques are explored. This seminar talk will first describe the operating principle of the XENON1T detector and present the latest WIMP search results. In a second part, the low-background techniques employed and developed for the construction of the XENONnT experiment, the upgrade of the current detector, will be highlighted.