The purpose of the proposed PhD work is to join our ongoing efforts to build a new experimental platform for manipulating arrays of circular strontium atoms in a cryogenic environment. Our team has recently succeeded in trapping individual ground-state strontium atoms in optical tweezers. The next steps are to transfer strontium atoms into the circular state and recapture them using tweezers tuned close to the optical transition of the ionic core. We will then demonstrate that it is possible to measure the state of the Rydberg atom using selective fluorescence of the second valence electron. During their master’s internship, the student will participate the integration of the setup in a new cryogenic environment and set up a new laser system to improve the fidelity of the preparation of the circular state.