Leonardo Vannoli

PhD student
Avatar, no personal image available
Leonardo Vannoli


Research activity

My PhD work mainly concerns the pixel tracker of the ATLAS experiment at CERN (ATLAS ITk). I am currently carrying out characterization and test of pixel modules in silicon RD53A and next RD53B. These modules are composed of 3D pixel sensors, technology developed in the ATLAS experiment. The tests on these modules are carried out both in the laboratory at the Physics department of the University of Genova, and at the DESY laboratory in Hamburg, where it is possible to make efficiency measurements of the modules using an electron beam. I'm also studying the properties of the carbon Local Support that will be mounted in the new pixel tracker Outer EndCap area and on which part of the modules composing the tacker-self will be mounted.

I am therefore in charge of analyzing the data collected during metrology measurements at different temperatures at the mechanical workshop of the Physics department of the University of Genova. I am also working on the simulation of possible thermal deformations of the carbon supports in order to have a comparison with the data obtained during the measurement campaigns.

I am also working on the development of the Production DataBase (PDB) of the ITk upgrade, for the Outer EndCap Local Support section. The PDB will allow the various production sites to keep track of all the components used during the production of Local Support and of the produced ones. This work is accompanied by the development of a graphical interface that allows easy data entry and more user friendly consultation of the DataBase. 

On the data analysis front, I will deal with the search for metastable heavy charged particles. These particles also called R-Hadrons are composed of a squark (supersymmetric partner of quarks) and a quark or a gluino (supersymmetric partner of gluons) and a quark, and are produced during proton collisions at CERN. The analysis makes use of the information of the charge released by these particles during the ionization process in the passage through the internal ATLAS tracer. Since particles are expected to have a very large mass, large releases of charge are sought within the tracker in association with the production of a jet revealed in the calorimeters.