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: Fabio Ravera email: fabio.ravera89@gmail.com ciclo: XXIX year completed (1,2 or 3): 3 supervisor: Ada Solano ------------------------------------------- UNDERGRADUATE COURSES (Laurea Magistrale) (only completed courses, with examination passed in the year) title: Elettronica digitale teacher: Michela Greco hours: 48 ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: 11th "Trento" Workshop on Advanced Silicon Radiation Detectors place: Parigi (France) webpage: https://indico.cern.ch/event/452766/ days: 3 talk or poster (Y/N): Y ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: 3rd Elba Workshop on Forward Physics @LHC Energy place: La Biodola, Isola d’Elba (Italy) webpage: https://indico.cern.ch/event/505807/ days: 3 talk or poster (Y/N): Y ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: 8th International Workshop on Semiconductor Pixel Detectors for Particles and Imaging place: Sestri Levante (Italy) webpage: https://agenda.infn.it/conferenceDisplay.py?confId=10190 days: 5 talk or poster (Y/N): Y ------------------------------------------- CONFERENCES, WORKSHOP (only those attended in the current year) title: QCD at LHC: forward physics and UPC collisions of heavy ions place: Trento (Italy) webpage: https://indico.cern.ch/event/568781/timetable/#all days: 3 talk or poster (Y/N): Y ------------------------------------------- VISITS AND STAGES (only those done in the current year) institution: Fermilab place: Batavia, Illinois, USA starting date: 23/03/2016 days: 10 motivation: Testbeam on 3D pixel detectors ------------------------------------------- VISITS AND STAGES (only those done in the current year) institution: CERN place: Prevessin, Francia starting date: 08/08/2016 days: 16 motivation: Pixel DOC shifts --------------------------------------------------- Research activity/Publications in the current year (max characters 2500) The first months of 2016 have been dedicated to the analysis finalization of the data collected at the beam test done in November 2015 at FNAL on irradiated 3D detectors. One of the issue to be overcome it has been the non-uniform irradiation of the detector which required a big effort in interpreting the data. In parallel to that I developed an automatic procedure for data analysis, which automatically runs the alignment, which was previously run by the user. At the beginning of the year the CT-PPS 3D sensor production was completed. The wafers contain 1x1 cm2 sensor used for test together with 2x2 and 2x3 cm2 sensor that will be used for installation. In March his sensors have been bump-bonded at IZM to the readout chip (ROC), I test them in Torino and I performed a beam test at FNAL. The results obtained allowed to qualify the 3D production for CT-PPS. After that, the CT-PPS modules with larger dimension were chosen, based on the beam test results, for the flip chip to the readout chip. The test of them was done in Torino starting from the beginning of the summer by means of a temporary gluing to the CT-PPS flexible circuit, which previously debugged by me. The procedure was validated by sacrificing 2 modules. The test of all modules was completed in the middle of November and they have been sent to Genova for the final gluing to the flexible circuit. At the beginning of December a beam test on this detector is foreseen at the SPS. There we will have the possibility for debugging the readout electronics and check that the modules properly work in the same condition of cooling and vacuum foreseen in CT_PPS. In parallel to this hardware work, I worked on the search of diphoton events in centrally exclusive production with CT-PPS. This study became of large interest at the end of 2015 due to a mild excess observed by CMS and ATLAS in the diphoton mass spectrum at ~750 GeV. Thanks to the addition to CMS of the forward detectors of CT-PPS, the search for diphoton events in the central detector, together with two protons in the forward detectors would allow a high background suppression. On this subject I worked on the fast simulation of the CT-PPS detector in which I included the geometry of the TOTEM strips and diamond timing detectors installed for the 2016 data tacking. The aim of that is to compare the results obtained by the diphoton search under development by university of Kansas group with the Monte Carlo simulation of backgrounds and signals. --------------------------------------------------- Publications with direct contribution: Design optimization of ultra-fast silicon detectors N. Cartiglia et al. Nucl.Instrum.Meth. A 796 (2015) 141-148 Beam test results of a 15 ps timing system based on ultra-fast silicon detectors N. Cartiglia et al. arXiv:1608.08681 [physics.ins-det], submitted to Nucl.Instrum.Meth. A Tracking in 4 Dimensions, Nucl.Instrum.Meth. A (2016) N. Cartiglia et al. In press, available online 3 June 2016, http://dx.doi.org/10.1016/j.nima.2016.05.078 The CT-PPS tracking system with 3D pixel detectors F. Ravera, on behalf of the CMS and TOTEM Collaborations In publication in JINST --------------------------------------------------- List of CMS Publication which I signed: https://goo.gl/bwMlcZ BE AWARE: research activity and Pubs are not evaluated as didactic credits, but are requested to trace the PhD students' career