Metal Package PMT Photon Counting Head H11123 The H11123 is a photon counting head device consisting of a 28-mm (1-1/8") diameter head-on photomultiplier tube, a high-speed photon counting circuit, and a high-voltage power supply circuit. The high voltage power supply for photomultiplier tube and the discrimination level are preset to optimum values, allowing photon counting measurement by just connecting a +5 V supply. The H11123 can operate at high count rate. The effective photosensitive area is as large as 25 mm in diameter, so the incident light can be collected very efficiently. Product Variations Type No. H11123 Spectral Response 300 nm to 650 nm Features High detection efficiency This product can't be used at vacuum environment or reduced pressure environment. Specifications Parameter Input Voltage Max. Input Voltage Max. Input Current Effective Area Peak Sensitivity Wavelength 300 nm 400 nm Count Typ. 500 nm Sensitivity 600 nm 1 Count Linearity * Typ. Dark Count *2 Max. Pulse-Pair Resolution Typ. Typ. Output Pulse Width Min. Output Pulse Height *3 Typ. Recommended Load Resistance Signal Output Logic Operating Ambient Temperature Storage Temperature *4 Weight *1: Random pulse, at 10 % count loss *2: After 30 minutes storage in darkness *3: With input voltage +5 V, Load resistance 50 Ω *4: No condensation 62 Value +4.75 to +5.25 +6 70 25 420 1.9 × 105 4.4 × 105 3.6 × 105 1.1 × 105 5.0 × 106 100 200 20 10 2.0 2.2 50 Positive logic +5 to +40 -20 to +50 260 (at +25 °C) Unit V V mA mm nm s-1·pw-1 s-1 s-1 ns ns V Ω — °C °C g Photon Counting Heads Characteristic (Count sensitivity) TPMOB0229EA 104 TPMOB0230EA 103 105 DARK COUNT (s-1) COUNT SENSITIVITY (s-1·pW-1) 106 104 102 101 103 200 300 400 500 600 700 100 800 WAVELENGTH (nm) 5 10 15 20 25 30 35 40 AMBIENT TEMPERATURE (°C) Block Diagram PMT AMP COMPARATOR + PULSE SHAPER OUTPUT TO PULSE COUNTER - LLD HV POWER SUPPLY / VOLTAGE DIVIDER CIRCUIT POSITIVE LOGIC GND RL 50 Ω +5 V POWER INPUT TPMOC0223EA Dimensional Outlines (Unit: mm) 35.0 ± 0.5 28.5 ± 0.5 192 ± 1 450 ± 20 LOW VOLTAGE INPUT (+5 V) : AWG26 (RED) GND : AWG26 (BLACK) SIGNAL OUTPUT : RG-174/U EFFECTIVE AREA FRONT VIEW 25 MIN. SIDE VIEW TPMOA0065EA 63