Preliminary Background Model for LEGEND-1000
ORAL
Abstract
The Large Enriched Germanium Experiment for Neutrinoless double-beta Decay (LEGEND) aims to develop a phased $^{76}Ge$-based neutrinoless double beta decay ($0\nu\beta\beta$) experimental program with a discovery potential at a half-life beyond $10^{28}$ years. The final phase of the experiment, LEGEND-1000, will house a total mass of 1 ton HPGe detectors enriched with $^{76}Ge$ to provide a total exposure of 10 ton.yr. To achieve our discovery sensitivity goal, the detectors need to be operated in a nearly background-free regime enabled by a background index of less than $1 \times 10^{-5}$ cts/keV.kg.yr near the end-point energy $Q_{\beta\beta}$ (2039 keV). Numerous background suppression techniques have been implemented. These techniques include use of large inverted-coaxial point-contact (ICPC) detector with excellent energy resolution and pulse-shape discrimination capability, ultra-radiopure and low-mass components to minimize exposure as well as the active liquid-argon veto to reject backgrounds. In this talk, we will discuss how each of these techniques contribute to meeting our background goals for LEGEND-1000
*This work is supported by the U.S. DOE, and the NSF, the LANL, ORNL and LBNL LDRD programs; the European ERC and Horizon programs; the German DFG, BMBF, and MPG;the Italian INFN;the Polish NCN and MNiSW;the Czech MEYS;the Slovak SRDA; the Swiss SNF;the UK STFC; the Russian RFBR ;the Canadian NSERC and CFI; the LNGS and SURF facilities.
–
Presenters
-
Rushabh Gala
- North Carolina State University