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Títol: System for measurement superconductive materials at microwave frequencies

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Departament: TSC

Títol: System for measurement superconductive materials at microwave frequencies

Data inici oferta: 15-02-2022     Data finalització oferta: 15-10-2022

Estudis d'assignació del projecte:
Tipus: Individual
Lloc de realització:
    Departament: TSC
Paraules clau:
Microwave, superconductivity, surface resistance, resonator, Future Circular Collider, ALBA, CERN
Descripció del contingut i pla d'activitats:
Development of a system for measurements of material properties at microwave
frequencies and temperatures between 20 and 100 K. The work consists in the
design, fabrication and test of a simple microwave resonator to assess
superconducting materials properties in the temperature range of interest. Training
on the use of microwave simulation tools (CST or HFSS) will be provided if
necessary.The work for this project is part of the FCC study described in:



-Literature review: microwave resonators, superconductivity, particle accelerators
-Design resonator
-Fabricate resonator and test at room temperature
-Integrate resonator into existing cryostat
-Test resonator in cryostat
-Automatize measurements
-Perform measurements on representative samples of superconducting material
-Writing a final report (well suited for a TFG/TFM)
Overview (resum en anglès):
After the discovery of the Higgs boson, the Conséil Européen pour la Recherche Nucléaire (CERN) started a new research study for the foundation of a new particle accelerator that would extend the energy frontier in the research of particle physics, the Future Circular Collider (FCC). This degree thesis is performed in the framework of a consortium project between CERN, Universitat Polit ècnica de Catalunya (UPC), CELLS/ALBA Synchrotron Light Source, Institut de Ci`encies Materials de Barcelona (ICMAB) and Institut de Física d¿Altes Energies (IFAE) and as the continuation of the work realized in ALBA¿s internship, which tries to characterize the coating materials employed in the beam pipe of the hadron-hadron collider of the FCC accelerator (FCC-hh).

The purpose of this thesis is the design, study, fabrication, and test of a parallel plate resonator (PPR) capable of measuring the surface impedance of High-Temperature Superconductor Coated Conductors (HTS-CC) at frequencies around 2 kHz and 4 GHz to evaluate if the HTS-CC of some providers fulfill the electromagnetic conditions required for the beam pipe¿s coating. The design is intended to be employed in a 16T cryostat at temperatures around 20 K and 100K to simulate the requirements of the accelerator.

Nevertheless, in this thesis, we will only test a preliminary prototype in a 0T Janis cryostat using copper samples. The fundamental mode TEM1,0 is the only resonance mode that must be operable for surface impedance measurements. However, other resonance modes between 1 GHz and 20 GHz will be analyzed to determine if they are also operable or not.

The electromagnetic design of the PPR was designed and studied with an electromagnetic (EM) analysis 3D software called CST Studio Suite, whereas the mechanical prototype was designed with a 3D design software called Autodesk Fusion 360. The prototype was
manufactured in the UPC¿s workshop, and the samples of the experimental analysis were processed with an Algorithm for Resonator Parameter Extraction (ARPE) developed by UPC and ALBA.

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