Fudan multi-purpose active target time projection chamber (fMeta-TPC) for photonuclear reaction experiments
摘要
Active target time projection chambers are state-of-the-art tools in the field of low-energy nuclear physics and are particularly suitable for experiments using low-intensity radioactive ion beams or gamma rays. The Fudan multi-purpose active target time projection chamber (fMeta-TPC) with 2048 channels was developed to study α-clustering nuclei. This study focused on the photonuclear reaction with a laser Compton scattering gamma source, particularly for the decay of the highly excited α cluster state. The design of fMeta-TPC is described in this paper. A comprehensive evaluation of its offline performance was conducted using an ultraviolet laser and 241Am α source. The results showed that the intrinsic angular resolution of the detector was within 0.30°, and the detector had an energy resolution of 6.85% for 3.0 MeV α particles. The gain uniformity of the detector was approximately 10% (RMS/Mean), as tested by the 55Fe X-ray source.