May 24 – 28, 2021
America/Vancouver timezone

Optical Model for Large Area Photomultipliers of JUNO and Other

May 25, 2021, 5:00 AM
Poster Sensors: Photo-detectors Sensor Posters: Photodetectors


Yaoguang WANG (Institute of High Energy Physics, CAS, Beijing, 10049, China)


Photomultipliers (PMTs) are widely used in scintillation and Cherenkov detectors for their great performances on photon detection. For example, the Jiangmen Underground Neutrino Observatory (JUNO) will use ~18,000 20-inch PMTs in its central detector to achieve an unprecedented energy resolution of 3%/√(E(MeV)). A key parameter of PMT is its detection efficiency (DE), which will be strongly influenced by the optical processes in PMT including: (1) Reflection between external medium and PMT bulb. (2) Reflection, absorption and transmission on its anti-reflective coating and photocathode, in which interference effect happens. (3) Multiple reflection inside PMT. Based on multilayer thin film theory, experimental tests and Geant4 simulations, a PMT optical model has been established for the 20-inch PMTs used in JUNO, including the NNVT MCP-PMT and the Hamamatsu dynode PMT. In this talk, the PMT optical model and its related experimental tests will be introduced.

Primary author

Yaoguang WANG (Institute of High Energy Physics, CAS, Beijing, 10049, China)

Presentation materials