... nine stage, side-on photomultiplier tubes, borosilicate glass, double-alkali photocathode Features: Diameter of 28.5mm ... inch), nine stage, side-on photomultiplier tubes, borosilicate glass,double-alkali photocathode, 170 ~ 350nm spectral response, ... Φ28.5mmDynodeStructureRing FocusedNumber of Stage9Window MaterialBorosilicate glassAnode Pulse rise time2.nsBaseE678-11A Operating ambient temperature- ...