Speaker
Description
Determination of the absolute neutrino mass scale has been one of the main challenges in modern physics ever since the discovery of neutrino oscillations at the end of last millennium. Although oscillation experiments showed that neutrinos have a non-vanishing mass, they provide no information on the absolute mass scale, and a different, more direct, approach is required.
With the KATRIN experiment reaching its desired goal of 1000 days of measurement, allowing the neutrino mass to be constrained to to a value in the vicinity of 0.3 eV, focus of the future experiments is to go beyond the inverted-mass ordering and and eventually excluding it.
In this regard, development of new detector technologies is of utmost importance, with quantum-sensor-arrays currently being the front runners due to their exceptional performance and excellent energy resolution.
With this poster, we present our ongoing efforts to develop large-area cryogenic micro-calorimeter arrays, to bring the ultra-high resolution electron-spectroscopy to the next level, as a basis for the next-generation neutrino mass experiment with tritium, KATRIN++.
We present the results of our first characterization campaigns with the $\mathrm{^{83}Rb/^{83m}Kr}$ radioactive source, and discuss our on-going efforts towards the proof-of-principle measurements of the tritium $\upbeta$-spectrum, using a novel tritium-graphene source.
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