Compact Head-on PMT Photon Counting Head H7828 Series The H7828 series is a photon counting head device containing a 19-mm (3/4") diameter head-on photomultiplier tube, a high-speed photon counting circuit, and a high-voltage power supply circuit. The high voltage supply for photomultiplier tube and the discrimination level are preset to optimum values, allowing photon counting measurement by just connecting a +5 V supply. Despite its compact size, the effective photosensitive area is as large as 15 mm in diameter, so the incident light can be collected very efficiently. Compared to other PMT modules, the H7828 series has higher resistance to vibration and shock, making them suitable for portable or mobile measurement equipment. Product Variations Type No. H7828 H7828-01 Spectral Response 300 nm to 650 nm 300 nm to 850 nm Features For visible range For visible to near IR range 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 700 nm Count Linearity *1 Typ. Dark Count *2 Max. Pulse-pair Resolution Output Pulse Width Min. Output Pulse Height *3 Typ. Recommended Load Resistance Signal Output Logic Operating Ambient Temperature *4 Storage Temperature *4 Weight (at +25 °C) H7828 H7828-01 +4.5 to +5.5 +6 60 15 380 1.7 × 105 2.1 × 105 1.6 × 105 1.0 × 105 5.9 × 104 420 2.1 × 105 3.6 × 105 2.8 × 105 5.0 × 104 — 1.5 × 106 200 500 *1: Random pulse, at 10 % count loss *2: After 30 minutes storage in darkness *3: With input voltage +5 V, Load resistance 50 Ω and Coaxial cable RG-174/U (450 mm) *4: No condensation 58 s-1·pW-1 s-1 2000 3500 70 30 3.0 3.5 50 Positive logic +5 to +40 -20 to +50 70 Unit V V mA mm nm s-1 ns ns V Ω — °C °C g Photon Counting Heads Characteristics (Count sensitivity, Dark count) 106 TPHOB0051EA 105 TPHOB0052EA COUNT SENSITIVITY (s-1. pW-1) 104 H7828-01 H7828-01 DARK COUNT (s-1) 105 H7828 104 103 102 H7828 101 103 200 300 400 500 600 700 800 100 900 5 10 15 20 25 30 35 40 AMBIENT TEMPERATURE (°C) WAVELENGTH (nm) 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 TPHOC0035EE Dimensional Outlines (Unit: mm) EFFECTIVE PHOTOCATHODE ( 15 MIN.) 18.6 ± 0.7 18 14.0 ± 0.5 50.0 +1.0 -0 THREADED HOLE for OPTION (4-M2 DEPTH: 5) FRONT VIEW 56.0 +0.5 -0 10.0 ± 0.5 SIGNAL OUTPUT BNC-R 19.0 ± 0.5 18.0 ± 0.5 0 +0.1 -0.3 18 25.0 ± 0.5 26.0 +0.5 -0 16.0 ± 0.5 POWER INPUT CONNECTOR HIROSE HR10A-7R-6P 1: LOW VOLTAGE INPUT (+5 V) 2: GND 3: IC* 4: IC* 5: NC 6: NC MOUNTING THREADED HOLE (2-M3 DEPTH: 5) SIDE VIEW * Internal Connection (Do not use) REAR VIEW Power cable with connector (HIROSE HR10A-7P-6S) is supplied with H7828 series 700 BLACK : GND RED : LOW VOLTAGE INPUT (+5 V) WHITE : NC BULE : NC GREEN: NC TPHOA0028ED 59