WISP Searches on a Fiber Interferometer under a Strong Magnetic Field
A novel table-top experiment is introduced to detect photon-axion conversion: WISP Searches on a Fiber Interferometer (WISPFI). The setup consists of a Mach-Zehnder-type interferometer with a fiber placed inside an external magnetic field (14 T), where mixing occurs and is detected by measuring changes in phase/amplitude. We will use hollow-core photonic crystal fibers (HC-PCF) to achieve resonant mixing that is tuneable by regulating the gas pressure in the fiber. An unexplored axion mass-range (50 meV - 100 meV) can be probed reaching the two-photon coupling expected for the QCD axion.