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Labanca, Gabriele (2016) Study of monitoring system of a calibration laser for the iTOP detector at Belle II. [Laurea triennale]

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Abstract

The work presented in this thesis concerns a study on a calibration system to be used by the iTOP (”Time Of Propagation”) detector in the Belle II experiment at superKEKB, managed by KEK, the Japanese High-Energy Accelerator Research Organization. The iTOP detector will be used to identify charged particles, π and K. A calibration system for the iTOP uses a laser, whose characteristic emission is to be known. The thesis focuses on the developement of a data analysis method to be used in the monitoring system to describe the emission and study its behaviour under different conditions. The signal acquired is described as a RC decay: an estimate of the pedestal value is computed, and the distribution of the delay between the trigger pulse and the arrival of the photon is discussed. Different variables is considered: the maximum amplitude of the signal, the amplitude at a fixed bin, and the integral of the signal. Furthermore, the signals are fitted: the distribution of the parameters allows a deeper inspection, while the integral of the function is taken into account as a descriptive variable. The best variable results to be the integral of the signal, which presents a neatly separated distribution, well described by a sum of Gaussian functions. Since this method is tested with different settings of the laser, it is ready to be used to analyze a variety of working conditions.

Tipologia del documento:Laurea triennale
Corsi di Laurea Triennale:Scuola di Scienze > Fisica
Parole chiave:data analysis, superKEKB, particles, photodiode
Settori scientifico-disciplinari del MIUR:Area 02 - Scienze fisiche > FIS/04 Fisica nucleare e subnucleare
Codice ID:53467
Relatore:Lacaprara, Stefano
Data della tesi:Settembre 2016
Biblioteca:Polo di Scienze > Dip. Fisica e Astronomia "Galileo Galilei" - Biblioteca
Tipo di fruizione per il documento:on-line per i full-text
Tesi sperimentale (Si) o compilativa (No)?:

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