Neutrino Detector Calibration

Use of Beam Physics Lab facilities can provide a test beam of charged particles or photons for calibrating liquid scintillator detectors, especially for application in short baseline neutrino experiment.

Absolute energy scale to <1% over the detected spectrum is critical to determine the sensitivity to neutrino mass hierarchy. The energy of electron/positron from the beam line can be controlled with small energy uncertainty and continuously scanning through a wide range of energy spectrum, hence it can be used to calibrate liquid scintillator for its light yield at fixed energy, non-linear response over large energy range, and provide direct comparison between gamma and electron/positron. Such an application of a beam line has been demonstrated in Super-K calibration and proposed for JUNO.