Wednesday 27 September 2017 Speaker: Henrique Araujo (Imperial College London) Title: "Two-Phase Xenon Detectors for Rare Event Searches” Abstract: The search for particle dark matter interactions and other rare events such as 0 decay demands detector technologies offering very low energy thresholds, good energy and spatial resolutions, and potential for low radiological backgrounds. Two-phase xenon detectors, a type of Liquid Xenon Time Projection Chamber (LXe-TPC), are at the forefront of these searches – partly owing to the interesting properties of this noble liquid as a dark matter and 0 target, and because of its excellent properties for radiation detection in general. I will review the operating principles of these detectors and the microscopic xenon physics that underpins them, and how our understanding of this technology has advanced tremendously in the last few years.