Transition-Edge Sensors for HOLMES

Puiu, A.; Becker, D.; Bennett, D.; Biasotti, M.; Borghesi, M.; De Gerone, M.; Faverzani, M.; Ferri, E.; Fowler, J.; Gallucci, G.; Gard, J.; Gatti, F.; Hilton, G.; Giachero, A.; Mates, J.; Nucciotti, A.; Pessina, G.; Schmidt, D.; Swetz, D.; Ullom, J.; Vale, L.

doi:10.1007/s10909-019-02290-8

HOLMES is an experiment aiming at performing a direct measurement of the neutrino mass from the electron capture (EC) spectrum of 163Ho. In order to reach a sensitivity of the order of ∼ 1 eV/c2 on the neutrino mass, it is necessary to gather as many as 10 13 events in the 3-year projected live time of HOLMES, keeping the pileup fraction as low as 10 - 4. This is not a trivial matter when it comes to low- temperature calorimeters, which usually have a rather slow time response. At the same time, a large number of detectors need to be operated simultaneously, and hence, in order to avoid an extremely large cryogenic facility, multiplexing is required. In this contribution, I will outline the current status and perspective of HOLMES, with special care devoted to the detectors and readout system, which have currently reached their target performance.

Transition-Edge Sensors for HOLMES

Puiu A.;Becker D.;Bennett D.;Biasotti M.;Borghesi M.;De Gerone M.;Faverzani M.;Ferri E.;Fowler J.;Gallucci G.;Gard J.;Gatti F.;Hilton G.;Giachero A.;Mates J.;Nucciotti A.;Pessina G.;Schmidt D.;Swetz D.;Ullom J.;Vale L.

2019-01-01

Abstract

HOLMES is an experiment aiming at performing a direct measurement of the neutrino mass from the electron capture (EC) spectrum of 163Ho. In order to reach a sensitivity of the order of ∼ 1 eV/c2 on the neutrino mass, it is necessary to gather as many as 10 13 events in the 3-year projected live time of HOLMES, keeping the pileup fraction as low as 10 - 4. This is not a trivial matter when it comes to low- temperature calorimeters, which usually have a rather slow time response. At the same time, a large number of detectors need to be operated simultaneously, and hence, in order to avoid an extremely large cryogenic facility, multiplexing is required. In this contribution, I will outline the current status and perspective of HOLMES, with special care devoted to the detectors and readout system, which have currently reached their target performance.