Laser Calibration System in JUNO

Understand

A UV laser calibration system is developed for the Jiangmen Underground Neutrino Observatory (JUNO), a 20-kton liquid scintillator-based, long baseline reactor anti-neutrino experiment.

• This system is capable of delivering fast laser pulses (<1 ns) into the detector with a photon intensity ranging from hundreds of keV to a few TeV equivalent energy.
• An independent intensity monitoring system is developed for this laser, which has achieved a < 0.3% relative uncertainty.
• Such a system will be used to calibrate the response of the JUNO photosensors and electronics in situ to a sub-percent precision.