R2228

PHOTOMULTlPLlER TUBE R2228 For Visible to Near IR Low Light Detection Extended Red Multialkali Photocathode 28mm(1–1/8 Inch) Diameter, 11–stage, Head–On Type GENERAL Parameter Spectral Response Wavelength of Maximum Response MateriaI Photocathode Minimum Effective Area Window Material Structure Dynode Number of Stages Direct Interelectrode Anode to Last Dynode Capacitances Anode to All Other Electrodes Base SuitabIe Socket Description/Value 300 to 900 600 Extended red multialkali 25 Borosilicate glass Box–and –grid 11 3.0 3.5 14–pin glass base E678–14C(supplied) Unit nm nm mm dia. pF pF MAXIMUM RATINGS (Absolute Maximum Values) Supply Voltage Avarage Anode Current Ambient Temperature Parameter Between Anode and Cathode Between Anode and Last Dynode Value 1500 250 0.1 –80 to +50 Unit Vdc Vdc mA CHARACTERISTlCS (at 25 ) Min. 100 Max. Unit A/lm mA/W A/lm A/W 30 nA ns ns Typ. 200 Cathode 40 Sensitivity 0.3 20 150 Anode Sensitivity 3.0 104 7. 5 1 0 5 Gain Anode Dark Current (after 30min. storage in darkness) 8 Anode Pulse Rise Time 15 Time Response 60 Electron Transit Time NOTE: Anode characteristics are measured with the voItage distribution ratio shown below. Parameter Luminous (2856K) Radiant at 600nm Red/White Ratio (R–68) Luminous (2856K) Radiant at 600nm VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE K G Electrodes Ratio 1 SuppIy Voltage : 1000Vdc, Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11 1 1 1 1 1 1 1 1 1 1 1 K : Cathode, Dy : Dynode, P : Anode, G:Grid P Subjec...