NbTi Thin-Film SRF Cavities for Dark Matter Search

The search for dark matter is now looking at axion-like particles (ALPs) as a very promising candidate to understand our universe. Within the framework of haloscope detectors for ALPs, we explore the performances of NbTi thin-film coatings on Cu resonating cavities to investigate the presence of axi...

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Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2024-10, Vol.34 (7), p.1-6
Main Authors: Marconato, Giovanni, Pira, Cristian, Alesini, David, D'Agostino, Domenico, Azzolini, Oscar, Braggio, Caterina, Caforio, Roberta, Chyhyrynets, Eduard, D'Elia, Alessandro, Fracasso, Michela, Gambardella, Umberto, Garcia, Vanessa, Gatti, Claudio, Ghigo, Gianluca, Di Gioacchino, Daniele, Gozzelino, Laura, Keppel, Giorgio, Ligi, Carlo, Maccarrone, Giovanni, Pompeo, Nicola, Rettaroli, Alessio, Salmaso, Alessandro, Silva, Enrico, Stivanello, Fabrizio, Tocci, Simone, Torsello, Daniele
Format: Article
Language:English
Subjects:
Cavity resonators
Chemical composition
Chemical treatment
Copper
Dark matter
haloscope
Hypothetical particles
Magnetic fields
Magnetron sputtering
NbTi
Niobium base alloys
PVD
Resonators
Sputtering
SRF
Substrates
Superconducting magnets
superconductivity
thin film
Thin films
Type II superconductors
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Summary:The search for dark matter is now looking at axion-like particles (ALPs) as a very promising candidate to understand our universe. Within the framework of haloscope detectors for ALPs, we explore the performances of NbTi thin-film coatings on Cu resonating cavities to investigate the presence of axions in the range of 35-45-µeV mass. In this work, two different compositions of NbTi thin films are studied, and their performances in high magnetic field are presented. The chemical treatments and dc magnetron sputtering details of the preparation of three 9-GHz resonant cavities and a 7-GHz resonant cavity are shown along with the cavities' quality factor measurements at different applied magnetic fields.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2024.3416541