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Archivio digitale delle tesi discusse presso l’Università di Pisa

Tesi etd-06122023-153816


Tipo di tesi
Tesi di laurea magistrale
Autore
LICOFONTE, CHIARA
URN
etd-06122023-153816
Titolo
Design of handling fixtures for the integration and cold testing of SSR2 superconducting cavity and solenoid at Fermilab facilities
Dipartimento
INGEGNERIA CIVILE E INDUSTRIALE
Corso di studi
INGEGNERIA MECCANICA
Relatori
relatore Prof. Neri, Paolo
relatore Ing. Passarelli, Donato
relatore Ing. Parise, Mattia
relatore Prof. Paoli, Alessandro
Parole chiave
  • Solenoid
  • Cavity SSR2
  • Fermilab
  • Transportation Tooling
  • Spoke Test Cryostat
Data inizio appello
12/07/2023
Consultabilità
Non consultabile
Data di rilascio
12/07/2093
Riassunto
This work was carried out partly in Italy and partialy during a trainee-ship at the Superconducting Radio-Frequency (SRF) department of Fermilab, which is recognized as America's leading laboratory for particle physics and accelerator research.
The need is to transport and insert in the Spoke Test Cryostat a sub-assembly consisting of SSR2 cavities and a solenoid, interconnected by a bellow. The approach taken was to seek streamlined and effective design solutions that would maintain the system's rigidity during its transfer from the MP9 building to the MDB building (defining all the transportation sub-phases in detail), where the Spoke Test Cryostat (STC) is located. The Spoke Test Cryostat serves as a small cryomodule for testing particle accelerator cavities and other components once they have exited the cleanroom environment in order to assess their performances.
Several frames have been developed for the transportation and insertion of the sub-assembly. These include the main frame and bottom frame for road transport, the rail system, the insertion frame and the dolly for indoor transport and insertion into the STC; these structures were then imported into Ansys Workbench for structural analysis, and welds and screws, where applicable, were thoroughly verified, obtaining positive results which meet the design criteria. In particular, for the transportation tooling, extensive simulations were conducted to assess its performance during critical phases such as lifting and braking. The simulations involved applying loads corresponding to 1g and 1.5g, respectively, to evaluate the tooling's response under these conditions. Similarly, for the insertion tooling, simulations were performed by applying the weights of the working components.
Furthermore, as a secondary task, an enclosure for the solenoid, to be used during cleaning process, was designed. The solenoid is used in conjunction with the SSR2 cavity and the enclosure will be 3D printed using stereo-lithography with Accura25 material specifically chosen for cleanroom application.
Structural verifications were also conducted for the enclosure using Ansys Workbench, considering critical usage conditions. The results of these verifications were positive, demonstrating that the enclosure meets the required design criteria.

In this thesis are pointed out all the design details of all the structures mentioned above and also all the structural and dynamic analysis results, highlighted all points of strength that can make possible the successful achievement of the intended goals.
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