... tubes, borosilicate glass, double-alkali photocathode Diameter of 28.5mm(1.12 inch), nine stage, side-on ... borosilicate glass, double-alkali photocathode Features: Diameter of 28.5mm(1.12 inch), nine stage, side-on ... Range300~680nmWavelength of Maximum Response 420nmMinimum effective AreaΦ28.5mmDynodeStructureRing FocusedNumber of Stage9Window MaterialBorosilicate glassAnode Pulse rise time2 ...