ETD

Archivio digitale delle tesi discusse presso l'Università di Pisa

Tesi etd-03272018-095241


Tipo di tesi
Tesi di laurea magistrale
Autore
RUIU, FRANCESCO
URN
etd-03272018-095241
Titolo
Design and thermal analysis of Mu2e electromagnetic calorimeter cooling system at Fermilab
Dipartimento
INGEGNERIA DELL'ENERGIA, DEI SISTEMI, DEL TERRITORIO E DELLE COSTRUZIONI
Corso di studi
INGEGNERIA ENERGETICA
Relatori
relatore Prof. Desideri, Umberto
relatore Prof. Donati, Simone
relatore Ing. Raffaelli, Fabrizio
Parole chiave
  • thermal simulations
  • Mu2e
  • Fermilab
  • Electromagnetic calorimeter
  • Cooling system
  • vacuum
Data inizio appello
24/04/2018
Consultabilità
Completa
Riassunto
Mu2e is a complex experimental apparatus composed of several independent detectors, including a straw-tracker and a crystal-based electromagnetic calorimeter.
The calorimeter has been designed and will be constructed by a collaboration among the Istituto Nazionale di Fisica Nucleare (INFN), the California Institute of Technology and Fermilab. The calorimeter has the fundamental function to measure the electrons energy, time and position of impact. It is a challenging detector, designed to operate in a hostile environment: large magnetic field, harsh radiation level and in vacuum. Moreover, the detector will be accessible for maintenance only for an extremely limited number of weeks in one year. Operation in vacuum has an immediate consequence on the electronics operation: a dedicated cooling system is required. The high radiation level requires radiation hard electronic components, which show an increase of power dissipation with the absorbed dose. All these possible effects have to be taken into account in the design of the cooling system.
I have worked with the INFN Pisa, INFN-Frascati and the Fermilab groups. My Master Thesis research project focuses on the design and the thermal analysis of the calorimeter electronics cooling system, in particular the data acquisition electronics, hosted in the DAQ crates. I have performed measures of dimensions and temperature on the electronic board (DIRAC) in order to create an accurate model for thermal simulations. I have also designed the thermal plate which allows an adequate cooling of the board and i have performed the experimental tests on the board in a vacuum chamber.
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