Speaker
Description
BINGO is a project dedicated to explore and demonstrate new methods for background reduction in cryogenic calorimetric $0\nu\beta\beta$ searches. With a target background index at the level of $10^{-5}$ counts/(keV kg yr) it aims at providing a path towards a nearly background free $0\nu\beta\beta$ experiment with a tonne of the isotopes of interest $^{100}$Mo and $^{130}$Te. The major design aspects to achieve this goal are (i) a novel detector assembly reducing the exposed surface area of un-instrumented (passive) materials in the detector array by more than an order of magnitude, (ii) an additional tightly packed array of BGO scintillators that surrounds the detector array and acts as active cryogenic veto system and (iii) the use of enhanced Neganov-Trofimov-Luke based light detectors that help mitigate the pile-up background for $^{100}$Mo and ensure the alpha-beta discrimination in $^{130}$TeO$_2$. In this talk, we will describe the technical design of these concepts, results from prototypes of the technologies in proof-of concept measurements and initial Geant4 based projections of the impact of these improvements in a CUORE/CUPID size experiment.
