On October 7, 2021, the Borexino detector completed its data taking, and the DAQ and the photomultiplier tubes were turned off. A few days later, operations to drain the scintillator from the detector began. After almost 15 years of world-leading measurements that have mapped the entire solar neutrino spectrum, including the first detection of CNO neutrinos, have measured the antineutrinos from earth’s radioactivity, and set new limits for the neutrino magnetic moment, it is time to celebrate this experiment which has redefined the standards for rare event physics.
In early December, 2021, the Borexino collaboration convened at the Gran Sasso laboratory for a final farewell to what had become a home to many scientists from institutions in Italy, the USA, Germany, France, Poland, Russia, Ukraine, and Hungary.
Members of Borexino next to Water Tank 
Members of Borexino in front of the “Big Building West”