Another step completed: the Borexino Stainless Steel Sphere (SSS) has been completely filled with ultra-pure water. Next steps:
- replace the water with buffer liquid and scintillator;
- filling the Water Tank with ultra-pure water (shield).
“The 2021 Giuseppe and Vanna Cocconi Prize for an outstanding contribution to Particle Astrophysics and Cosmology is awarded to the Borexino collaboration for the groundbreaking observation of solar neutrinos from the pp and CNO chains that provided unique and comprehensive tests of the Sun as a nuclear fusion engine.”