A tunable dielectric resonator for axion searches at 11 GHz

Journal Article · Thu Oct 10 04:00:00 EDT 2024 · TBD

OSTI ID:2504569

Di Vora, R. ^[1]; Gardikiotis, A. ^[2]; Braggio, C. ^[3]; Carugno, G. ^[2]; Lombardi, A. ^[1]; Ortolan, A. ^[1]; Ruoso, G. ^[1]

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1. INFN, Legnaro
2. INFN, Padua
3. INFN, Padua; Padua U.

In the context of axion search with haloscopes, tunable cavity resonators with high quality factor and high effective volume at frequencies above about 8 GHz are central for probing the axion-photon coupling with the required sensitivity to reach the QCD axion models. Higher order modes in dielectrically-loaded cavities allow for higher effective volumes and larger quality factors compared to basic cylindrical cavities, but a proper cavity frequency tuning mechanism to probe broad axion mass ranges is yet not available. In this work, we report about the design and construction of a tunable prototype of a single-shell dielectric resonator with its axion-sensitive pseudo-TM$$_{030}$$ high-order mode at about 11 GHz frequency. A clamshell tuning method previously tested for empty cylindrical resonators has been perfected for this geometry through simulations and in situ tests conducted at cryogenic temperature. Tuning is accomplished in a range of about 2 $$\%$$ the central frequency, without significantly impacting the quality factor of about 175000. The experimental results presented in this work demonstrate the tunability of this type of resonator, definitely confirming its applicability to high frequency axion searches.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• DOE Contract Number: 89243024CSC000002
• OSTI ID: 2504569
• Report Number(s): FERMILAB-PUB-24-0878-SQMS-V; arXiv:2410.07774; oai:inspirehep.net:2838949
• Journal Information: TBD, Journal Name: TBD
• Country of Publication: United States
• Language: English

Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS