Speaker
Description
The LEGEND Collaboration pursues an experimental program to search for the neutrinoless double-beta $(0\nu\beta\beta)$ decay of $^{76}Ge$ with discovery potential at half-lives beyond $T_{1/2} (0\nu\beta\beta) = 10^{28}$ yr. The first phase, LEGEND-200 has started operations at LNGS with 140 kg of HPGe detectors and plans to install additional detectors in the near future. With an exposure of 1 ton-year and a background index in the region of interest of less than $2 \cdot 10^{-4}$ cts/(keV kg yr), LEGEND-200 will reach a sensitivity of $T_{1/2} (0\nu\beta\beta)$ of about $10^{27}$ years.
In this talk, we present the experimental setup of LEGEND-200, the installation and commissioning of the first 140 kg of enriched detectors, and the performance of the sub-detector systems. We discuss the energy resolution, stability, and performance of the pulse shape discrimination of the HPGe detectors, the photo-electron yield and suppression factors of the liquid argon instrumentation, and the efficiency of the water Cherenkov detector.
This work is supported by the German MPG, BMBF, and DFG; the Italian INFN; the Polish NCN and MNiSW; the Czech MEYS; the Slovak SRDA; the European ERC and Horizon programs; the Swiss SNF; the UK STFC; the U.S. DOE and the NSF, the LANL, ORNL and LBNL LDRD programs; the Russian RFBR; the Canadian NSERC and CFI; the LNGS and SURF facilities.
| Submitted on behalf of a Collaboration? | Yes |
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