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For Ultraviolet Light Detection, Compact Size (15.9 mm diameter, 14.2 mm seated length), For Photon Counting (R9875P) GENERAL Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein. ©2012 Hamamatsu Photonics K.K. Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. SPECIFICATIONS Parameter Description / Value Unit Spectral Response Wavelength of Maximum Response Window Material Photocathode Dynode Base Weight Operating Ambient Temperature Storage Temperature Suitable Socket Suitable D Type Socket Assembly nm nm mm g 160 to 320 240 Synthetic silica Cs-Te Metal Channel Dy1: Cs-I, Others: Sb 12 pin base 6.5 -30 to +50 -80 to +50 E678-12-01 (Sold Separately) E10679 (Sold Separately) Material Minimum Effective Area Structure Number of Stage Material Supply Voltage: 1000 V, K: Cathode, Dy: Dynode, P: Anode VOLTAGE DISTRIBUTION RATIO Between Anode and Cathode Between Anode to Last Dynode Electrodes Ratio K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 0.5 P Parameter Unit Supply Voltage Average Anode Current V V mA Value 1250 0.01 Parameter Typ.Min. Unit Cathode Sensitivity Anode Sensitivity Gain Anode Dark Current (after 30 min storage in darkness) Dark Count BC Time Response mA/W A/W nA s-1 ns ns 1.0 × 104 / 2.5 × 104 B 4.0 × 105 / 1.0 × 106 B 0.01 1.2 1.6 × 103 / 8.0 × 103 B 1.0 × 105 / 5.0 × 105 B Max. 0.1 Radiant A Quantum Efficiency A Radiant A Anode Pulse Rise Time Electron Transit Time MAXIMUM RATINGS (Absolute Maximum Values) CHARACTERISTICS (at 25 °C) NOTE: AAt 254 nm BPhoton counting type (R9875P) CAt 1×106 gain METAL PACKAGE PHOTOMULTIPLIER TUBE R9875U, R9875P