Speaker
Description
In the last century, several astrophysical observations have provided strong evidences of the existence of dark matter in the Universe. This dark matter, non-luminous, and weakly interactive with ordinary matter, could be composed of massive particles called WIMPs.
XENON1T, the third direct detection experiment designed by the XENON collaboration, consists of a dual-phase (liquid-gas) time projection chamber (TPC), filled with xenon. XENON1T is the largest TPC ever built for dark matter search and conceived to detect an elastic scattering of a WIMP with the target nuclei. The energy transfer during such interaction induces a low energy nuclear recoil (below 100 keV).
In order to study the detector response to an energy deposit, the XENON collaboration carries out several calibration campaign with different sources. In particular, an internal source of Kr83m, which emits two radiations at low energies (32.2 keV and 9.4 keV), is used to calibrate XENON1T in the energy range where dark matter is expected.
Since data taking period dedicated to the search for dark matter lasts for several months, it is essential to monitor the detector stability and to study its response over time: regular Kr83m calibrations are carried out for this purpose.
Keywords: dark matter, direct detection, XENON1T, calibration
