SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 37: Neutrinos, Dark Matter IV

T 37.4: Vortrag

Dienstag, 21. März 2023, 17:45–18:00, POT/0251

WISPFI: WISP searches on a fiber interferometer — •Josep Maria Batllori Berenguer, Yikun Gu, Rebecca Harte, Dieter Horns, Marios Maroudas, and Johannes Ulrichs — Institut für Experimentalphysik, Universität Hamburg, Luruper Chausseee 149, D-22761 Hamburg

The search for new physics at the sub-eV scale has been particularly active in the last years. Our principal aim is the detection of the QCD axion although our design is applicable to other axion-like particles (ALPs). We introduce a new table-top experiment to detect photon-axion conversion: WISP Searches on a Fiber Interferometer (WISPFI).

The experimental setup consists of a partial free-space Mach-Zehnder-type interferometer. In one of the arms, the fiber is coiled and placed inside the bore of a superconducting solenoid magnet (14 T, 140 mm diameter warm bore), where mixing occurs. The photon-axion oscillations would be detected by measuring changes in phase/amplitude.

For the detection at resonant mixing, we will use hollow-core photonic crystal fibers (HC-PCF), taking advantage of their unique guiding and optical properties. In particular, a large axion mass range (10 meV–100 meV) is achievable by regulating the air pressure inside the core of the HC-PCF. The effect of the core radius, wavelength and bending in the mode propagation is also discussed. Finally, implementations of squeezed light, higher-power laser or the application of an external electric field can improve the sensitivity even further.