Abstract
The FAMU experiment, led by INFN at the Rutherford Appleton Laboratory (UK), is designed to measure the Zemach radius of the proton in muonic hydrogen (μp) with uncertainty better than 1%. A set of LaBr3(Ce) scintillating crystals, complemented by a High-Purity Germanium (HPGe) detector, are used to detect the delayed muonic oxygen (μO) X-ray emission, which signals the muonic hydrogen spin flip excited with a tunable MIR laser. The detector setup is in continuous development. After two periods of measurement in 2023, the detector configuration is currently being upgraded for the 2024–2025 runs with new detectors read out by SiPMs to enhance signal-to-noise ratio and improve time performance. In particular, all ½” scintillators are being substituted with 1” ones, increasing the solid angle coverage and optimising energy resolution and timing performances.
Published Version
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