Coherent elastic neutrino-nucleus scattering (CEvNS) opens new approaches for the search of new physics beyond the Standard Model. The NUCLEUS experiment aims to use the intense antineutrino flux produced from nuclear reactor cores to perform measurements of the CEvNS cross-section via gram-scale ultra-low threshold cryogenic detectors. A common problem with low threshold detectors is the calibration, since most radioactive sources tend to saturate the dynamical range of the sensors. In this dissertation, a photon-statistic based optical calibration setup has been developed and tested using detectors from the BULLKID R&D project. Both the developed hardware setup and the relative control software allow to automatically perform a full calibration of an array of detectors. During the development of this work, the DIANA analysis framework, developed for the CUORE experiment, has been compatibilized with the NUCLEUS DAQ and a new automatic analysis protocol was developed using the data from the NUCLEUS prototype runs. This protocol proved to be accurate at reproducing the results obtained via a model dependent study performed with an almost event by event inspection that was carried out in the early stages of NUCLEUS. Particular focus was given to the development of an event reconstruction procedure used to measure the energy of events that lie outside the linear response region of the detector. The last activity done for the NUCLEUS experiment was to develop a python based toolkit for the study of the discovery potential of the experiment. This toolkit was originally developed in the early stages of NUCLEUS by J.Rothe and has been intensely upgraded during the work presented in this thesis, in order to deal with different types of statistical checks and procedures.
Development and Commissioning of the Cryogenic Target Detectors for the Technical Run of the NUCLEUS Experiment
Technische Universität München（慕尼黑工业大学）；Technische Universität Wien（维也纳工业大学）；Max-Planck-Institut für Physik（马克斯·普朗克物理研究所）；Marietta-Blau-Institut für Teilchenphysik der Österreichischen Akademie der Wissenschaften（奥地利科学院玛丽埃塔·布劳粒子物理研究所）；Istituto Nazionale di Fisica Nucleare – Sezione di Roma ”Tor Vergata”（罗马大学核物理国家研究所托尔维加塔分部）；IRFU, CEA, Université Paris-Saclay（巴黎萨克雷大学CEA IRFU）；Sapienza Università di Roma（罗马第一大学）
Sub-keV energy calibration of CONUS+ via 71Ge M-shell neutron activation
Max-Planck-Institut für Kernphysik（马克斯·普朗克核物理研究所）；Karlsruher Institut für Technologie (KIT)（卡尔斯鲁厄理工学院）；Marietta-Blau-Institut für Teilchenphysik der ÖAW（奥地利科学院玛丽埃塔·布劳粒子物理研究所）；Mirion Technologies (Canberra) GmbH（米尔恩技术（堪培拉）有限公司）
