Tesi etd-06122018-215146 |
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Tipo di tesi
Tesi di laurea magistrale
Autore
BENEDETTI, EUGENIO
Indirizzo email
eugeniobene1@gmail.com
URN
etd-06122018-215146
Titolo
Design and thermal analysis of the cooling system of the electromagnetic calorimeter of the Mu2e experiment at Fermilab
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA MECCANICA
Relatori
relatore Prof. Monelli, Bernardo Disma
relatore Prof. Beghini, Marco
relatore Prof. Donati, Simone
relatore Raffaelli, Fabrizio
relatore Prof. Beghini, Marco
relatore Prof. Donati, Simone
relatore Raffaelli, Fabrizio
Parole chiave
- PEEK
- Mu2e
- Glue
- FNAL
- FermiLab
- Double scarf joint
- Adhesive
- SiPM
- Step joint
Data inizio appello
11/07/2018
Consultabilità
Non consultabile
Data di rilascio
11/07/2088
Riassunto
This Master Thesis is dedicated to the design of the electromagnetic calorimeter of the Mu2e experiment at Fermilab. Mu2e has the ambitious goal to search for the neutrinoless coherent conversion of the muon to an electron in the field of a nucleus. The observation of this physics process would provide the evidence that the theory, called Standard Model, which describes the interactions among elementary particles is not complete.
The Mu2e calorimeter has the fundamental function to detect and measure the energy, time and position of impact, of the electrons and identify the signal of conversion electrons, which is expected to be extremely rare, from the electrons produced in the muon decays.
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 (CalTech) and Fermilab (FNAL). I have worked for five
months at INFN in Pisa and visited Fermilab in June 2018. The calorimeter is part of a complex experimental apparatus composed of several
independent and complementary detectors, including a straw-tracker and a plastic scintillator cosmic-ray veto.
Chapter 1 and 2 report the description of the Mu2e experiment and electromagnetic calorimeter. The following Chapters describe my work which has been dedicated to the design of the cooling system of the calorimeter electronics. This is a fundamental problem in Mu2e, since the experiments
is operated in vacuum inside a cryostat.
Chapter 3 reports the thermal analysis of a SiPM (Silicon Photo Multiplier). This analysis is important to simulate to make sure the SiPM
is maintained at the operational temperature of 0°C.
Chapter 4 reports the mechanical tests performed on PEEK (PolyEther Ether Ketone): a tensile test to check the producer data but more important there are tests about adhesive bonding PEEK-PEEK. Different adhesive and different kind of joint were tested.
Chapter 5 describes the study of the thermal contraction of the electronic cooling lines. These are linked with the PEEK backplate by several M2 tap bolt and their function temperature is of -10°C while the backplate keep an higher temperature (at least during the kick off).
Chapter 6 reports my conclusions of my work.
The Mu2e calorimeter has the fundamental function to detect and measure the energy, time and position of impact, of the electrons and identify the signal of conversion electrons, which is expected to be extremely rare, from the electrons produced in the muon decays.
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 (CalTech) and Fermilab (FNAL). I have worked for five
months at INFN in Pisa and visited Fermilab in June 2018. The calorimeter is part of a complex experimental apparatus composed of several
independent and complementary detectors, including a straw-tracker and a plastic scintillator cosmic-ray veto.
Chapter 1 and 2 report the description of the Mu2e experiment and electromagnetic calorimeter. The following Chapters describe my work which has been dedicated to the design of the cooling system of the calorimeter electronics. This is a fundamental problem in Mu2e, since the experiments
is operated in vacuum inside a cryostat.
Chapter 3 reports the thermal analysis of a SiPM (Silicon Photo Multiplier). This analysis is important to simulate to make sure the SiPM
is maintained at the operational temperature of 0°C.
Chapter 4 reports the mechanical tests performed on PEEK (PolyEther Ether Ketone): a tensile test to check the producer data but more important there are tests about adhesive bonding PEEK-PEEK. Different adhesive and different kind of joint were tested.
Chapter 5 describes the study of the thermal contraction of the electronic cooling lines. These are linked with the PEEK backplate by several M2 tap bolt and their function temperature is of -10°C while the backplate keep an higher temperature (at least during the kick off).
Chapter 6 reports my conclusions of my work.
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