Design of low Tc TES chips as sensors for low background calorimeter arrays in neutrino physics*

Cryogenic calorimeters have established themselves as one of the primary technologies for rare event search experiments with applications from neutrinoless double beta decay, dark matter search to the novel field of precision measurements of the coherent elastic neutrino nucleus scattering CE??NS cross-sections. In this talk we will discuss the development and testing of a novel self-contained low Tc TES readout chip for application in the search for CE??NS with 40 g-scale absorbers in the Ricochet experiment, next generation CEvNS searches and for 0nbb-search applications in the CUPID program. The low impedance, fast response and existing multiplexing technologies make TES sensors very desirable in particular for future large-scale detector arrays as they can be mass produced with semiconductor technology and allow for scalable readouts. The chips can be readily connected to various absorbers via a deposited Au film as phonon collector on the target. We will present performance predictions from the thermal modeling of these devices with respect to the CEvNs program and the status of our detector fabrication and testing.