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GOutput WaveformGDark CountGCount Sensitivity TPMOB0258EA 300 500 700 900200 400 600 800 WAVELENGTH (nm) 103 104 105 COUNT SENSITIVITY (s-1.pW-1) 106 H11870-02 H11870-03 H11870-01 DARK COUNT (s-1) AMBIENT TEMPERATURE (°C) 10 20 30 405 1 52 53 5100 101 102 103 104 105 H11870-02 H11870-03 H11870-01 TIME (5 ns/div.) OUTPUT PULSE HEIGHT (1 V/div.) GND GND UN-TERMINATED 50 Ω LOAD 9 ns 9 ns Head-on PMT Photon Counting Head H11870 Series The H11870 series is a wide sensitive area photon counting head device containing a 25 mm (1") diameter head-on photomultiplier tube, a high-vol- tage power supply circuit and a photon counting circuit. The high voltage sup- ply for photomultiplier tube and the discrimination level are preset to optimum values, allowing photon counting measurement by just connecting a +5 V supply. The H11870 series has a function of over light detection output for in- dicating the excessive light operating condition. A mount flange (E6264) is provided as an option for easy installation to measurement equipment. (at +25 °C) *1: Random pulse, at 10 % count loss *2: After 30 minutes storage in darkness *3: Load resistance 10 kΩ *4: No condensation H11870 series can't be used at vacuum environment or reduced pressure environment. Typ. Typ. Typ. Typ. Typ. Typ. Max. Min. Min. Min. Max. Input Voltage Max. Input Voltage Max. Input Current Effective Area Spectral Response Peak Sensitivity Wavelength Count Sensitivity Count Linearity * Dark Count *2 Pulse-pair Resolution Output Pulse Width Output Pulse Height Recommended Load Resistance Signal Output Logic Over Light Detection Output * Operating Ambient Temperature *4 Storage Temperature *4 Weight 300 nm 400 nm 500 nm 600 nm 700 nm 50 Ω Load Un-terminated High Level Low Level 375 1.4 × 10 2.7 × 105 1.7 × 105 4.6 × 104 300 to 650 +4.75 to +5.25 100 420 2.3 × 10 4.1 × 105 3.4 × 105 5.7 × 104 6.0 × 106 300 +2.0 +4.0 Positive logic +3.5 +0.5 +5 to +40 -20 to +50 128 300 to 850 420 2.1 × 10 2.5 × 105 2.0 × 105 1.3 × 105 7.8 × 104 5000 15000 Unit V V mA mm nm nm s -1·pW-1 s-1 s-1 ns ns V Ω V g H11870-02 H11870-03H11870-01Parameter

Dimensional Outlines (Unit: mm) TPMO1061E01 MAR. 2015 IP TPMOC0226EB HAMAMATSU PHOTONICS K.K. HAMAMATSU PHOTONICS K.K., Electron Tube Division 314-5, Shimokanzo, Iwata City, Shizuoka Pref., 438-0193, Japan, Telephone: (81)539/62-5248, Fax: (81)539/62-2205 www.hamamatsu.com Germany: Hamamatsu Photonics Deutschland GmbH: Arzbergerstr. 10, D-82211 Herrsching am Ammersee, Germany, Telephone: (49)8152-375-0, Fax: (49)8152-2658 E-mail: info@hamamatsu.de United Kingdom: Hamamatsu Photonics UK Limited: 2 Howard Court, 10 Tewin Road, Welwyn Garden City, Hertfordshire AL7 1BW, United Kingdom, Telephone: (44)1707-294888, Fax: (44)1707-325777 E-mail: info@hamamatsu.co.uk North Europe: Hamamatsu Photonics Norden AB: Torshamnsgatan 35 SE-164 40 Kista, Sweden, Telephone: (46)8-509-031-00, Fax: (46)8-509-031-01 E-mail: info@hamamatsu.se TPMOB0254EA TPMOB0255EA GCount Rate Linearity and Over Light Detection Output GCount Rate Linearity Correction 103 103 104 105 106 107 108 109 1010 104 105 106 107 108 RELATIVE INPUT LIGHT COUNT RATE (s-1) 109 5 × 108 1010 1011 1012 OVER LIGHT DETECTION OUTPUT 0 V +4 V OUTPUT COUNT 103 -80 -70 -60 -50 -40 -30 -20 -10 4 105 106 107 108 COUNT RATE (s-1) DEVIATION (%) MEASURED CORRECTED Correction Formula N M t : Real Count Rate (s-1) : Measured Count Rate (s-1) : Pulse Pair Resolution (s) N = M 1-Mt OVER LIGHT DETECTION OUTPUT +4.0 V at the over light condition

0 V at the normal condition

L.L.D. HV POWER SUPPL Y / VOLTAGE DIVIDER CIRCUIT GND POWER INPUT +5 V TO PULSE COUNTER RL 50 Ω TPMOA0088EA 114 ± 1 1000 ± 50 M34 × P1.0 M34 × P1.0 47.0 ± 0.2 O-RING4- 3.3 MOUNT FLANGE E6264 (Sold Separately) 3.5 SIDE VIEWFRONT VIEW EFFECTIVE AREA ( 22 MIN.) 34 ± 0.5 RED: LOW VOLTAGE INPUT (+5 V) BLACK: GND BLUE: OVER LIGHT DETECTION OUTPUT SIGNAL OUTPUT : RG-174/U MAR. 2015HAMAMATSU PHOTONICS K.K.