Speakers
Description
The Taishan Antineutrino Observatory (TAO), a satellite detector of the Jiangmen Underground Neutrino Observatory (JUNO), aims to measure reactor antineutrinos with unprecedented energy resolution. Achieving this precision relies heavily on the performance of its high-coverage, cryogenically operated silicon photomultipliers (SiPMs). To fully exploit their performance, precise channel-level calibration is essential. This poster will present the comprehensive channel-level calibration framework developed for TAO, to extract key SiPM parameters from event-level charge and time information. The framework determines dark count rate, relative photon detection efficiency, time offsets, gain, and internal optical crosstalk for each channel. The calibration framework has been validated with real data. These results are essential for improving energy reconstruction and achieving TAO’s target resolution. In addition, the high-precision spectrum from TAO will provide critical input to JUNO’s determination of neutrino oscillation parameters, including the neutrino mass ordering.