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Photon counting head
H16721-40
The H16721 series is a photon counting head device containing a metal package photomultiplier tube having a GaAsP/GaAs photocathode and a thermoelectric cooler. The thermoelectric cooler reduces thermal noise generated from the photocathode which also offers a high quantum efficiency, allowing measurement to be made with a good S/N ratio even at very low light levels. The H16721-40 has high sensitivity on wavelength from 300 nm to 740 nm. The photomultiplier tube is maintained at a constant temperature by monitoring the output from a thermistor installed near the photomultiplier tube and regulating the current to the thermoelectric cooler.
Specifications
| Photocathode Area Shape | Round |
|---|---|
| Photocathode Area Size | Dia.5 mm |
| Wavelength (Short) | 300 nm |
| Wavelength (Long) | 740 nm |
| Wavelength (Peak) | 610 nm |
| Dimension (W x H x D) | 56 mm x 36 mm x 104 mm |
| Input Voltage | +4.5 V to +5.5 V |
| Max. Input Voltage | +6 V |
| Max. Input Current | 50 mA |
| Count Senstitivity at 400 nm Typ. | 5.3 x 105 s-1・pW-1 |
| Count Senstitivity at 500 nm Typ. | 9.0 x 105 s-1・pW-1 |
| Count Senstitivity at 600 nm Typ. | 10.3 x 105 s-1・pW-1 |
| Count Senstitivity at 700 nm Typ. | 8.5 x 105 s-1・pW-1 |
| Count Linearity | 1.5 x 106 s-1 |
| Dark Count Typ. | 100 s-1 |
| Dark Count Max. | 300 s-1 |
| Pulse-pair Resolution | 70 ns |
| Output Pulse Width | 30 ns |
| Output Pulse Height Min. | 3 V |
| Output Pulse Height Typ. | 3.6 V |
| Recommended Load Resistance | 50 Ω |
| Signal Output Logic | Positive logic |
| Operating Ambient Temperature | +5 ℃ to +35 ℃ |
| Storage Temperature | -20 ℃ to +50 ℃ |
| Weight | 395 g |
Dimensional outline (unit: mm)
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