Graduate School in Physics and Astrophysics ------------------------------------------- ANNUAL REPORT ------------------------------------------- Fill with a text editor (without TAB or formatting) Repeat fields for each course as necessary. ------------------------------------------- name: Emanuele Angelino email: emanuele.angelino@outlook.it ciclo: XXXV year completed (1,2 or 3): 1 supervisor: Mario Edoardo Bertaina, Gian Carlo Trinchero ------------------------------------------- GRADUATE SCHOOL COURSES (only completed courses, with examination passed in the year) code: 08 title: Data Analysis Techniques teacher: Livio Bianchi hours: 24 (6 CFU) code: 16 title: Chemo-dynamical evolution of the Milky Way teacher: Alessandro Spagna hours: 8 (2 CFU) ------------------------------------------- COURSES FROM OTHER GRADUATE SCHOOLS (only completed courses, with examination passed in the year) school: Polo Scienze della Natura, Universita' degli Studi di Torino title: Authors Workshop (Springer Nature) teacher: Rampioni, Migliorini hours: 3 school: Universita' degli Studi di Torino title: Corso di Formazione Generale alla Salute e Sicurezza per i Lavoratori teacher: / (E-Learning) hours: 4 school: Istituto Nazionale Fisica Nucleare title: Corso Nazionale di Formazione Online Sicurezza Informatica - BASE teacher: / (E-Learning) hours: 2 ------------------------------------------- TUTORING ACTIVITY institution: Università degli Studi di Torino (Laurea Magistrale in Fisica) code: MFN0831 course: Laboratorio di Fisica Nucleare e Subnucleare I hours: 18 ------------------------------------------- SUMMER SCHOOLS, INTERNATIONAL SCHOOLS (only those attended in the current year) title: XXIX Giornate Di Studio Sui Rivelatori - Scuola Franco Bonaudi place: Cogne (AO), Italy webpage: http://gsr.to.infn.it/ days: 5 (10-14 February 2020) talk or poster (Y/N): N ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: XENON Collaboration Meeting place: LNGS Assergi (AQ), Italy webpage: http://www.xenon1t.org/ days: 11-15 December 2019 talk (Y/N): N poster (Y/N): N title: XENON Collaboration Meeting place: Online webpage: http://www.xenon1t.org/ days: 13-15 May 2020 talk (Y/N): N poster (Y/N): N ------------------------------------------- VISITS AND STAGES (only those done in the current year ) institution: Università degli Studi di Napoli - INFN Napoli place: Napoli, Italy starting date: 11/12/2020 days: 5 institution: Laboratori Nazionali del Gran Sasso place: Assergi (AQ), Italy starting date: 06/07/2020 days: 6 institution: Laboratori Nazionali del Gran Sasso place: Assergi (AQ), Italy starting date: 19/07/2020 days: 7 institution: Laboratori Nazionali del Gran Sasso place: Assergi (AQ), Italy starting date: 23/08/2020 days: 16 --------------------------------------------------- Research activity/Publications in the current year (max characters 2500) During the first year of the PhD, my work was mainly focused on the analysis of low-energy calibration data of XENON1T. The detector consists of a two-phase Time Projection Chamber designed for dark matter direct detection. It was operating at Laboratori Nazionali del Gran Sasso (LNGS) from 2016 to 2018. The next generation multi-ton detector XENONnT, is currently reaching the end of its construction phase. Before XENON1T decommissioning, during my master thesis, a new low-energy calibration procedure exploiting 37Ar radioactive isotope has been implemented. I was involved from the beginning into the setup of experimental apparatus and data acquisition. This isotope decays emitting two monoenergetic lines at 2.82 and 0.27 keV, that allow to study the detector response close to its energy threshold. I have been working on the analysis of 0.27 keV line that is detectable only through delayed ionization signals, differently from 2.82 keV events in which primary scintillation signals are also present. Due to this lack of information a careful event selection is necessary. To distinguish calibration data from background and study the various properties, a set of specific quality cuts has been defined and the corresponding detector acceptance evaluated. The results have been compared with simulations of a model of signal production inside the detector in order to extract physical quantities, such as the number of electrons produced in liquid xenon at given energy and electric field or the observed ratio of 37Ar decays. These are obtained with greater precision than in the past since this calibration has been performed in a large scale xenon detector for the first time. The whole procedure has been developed and tested also for the forthcoming XENONnT detector in order to further improve its performances in the low energy region. Thanks to this activity, with the acquired expertise I will be able to contribute to XENONnT scientific data analysis in this energy region, which seems particularly promising, as soon as the detector will be operating. In parallel with the analysis, I have been working on the data acquisition system of the Neutron Veto of XENONnT, performing functional tests during the development of the software and partecipating to the installation of the front-end electronics. I also contributed in the cooling down and filling of the liquid xenon into the XENONnT TPC shifts at LNGS. [1] "Excess Electronic Recoil Events in XENON1T", XENON Collaboration + X. Mougeot, Phys. Rev. D 102, 072004 (2020) [2] "Energy resolution and linearity of XENON1T in the MeV energy range", XENON Collaboration, Eur. Phys. J. C (2020) 80:785. [3] "Light dark matter search with ionization signals in XENON1T", XENON Collaboration, Phys. Rev. Lett. 123, 251801 (2019), [4] "Search for Light Dark Matter Interactions Enhanced by the Migdal Effect or Bremsstrahlung in XENON1T", XENON Collaboration, Phys. Rev. Lett. 123, 241803 (2019) --------------------------------------------------- BE AWARE: visits and stages,research activity and pubs are not evaluated as didactic credits, but are requested to trace the PhD students' career