The H11123 is a photon counting head comprising a 28-mm diameter head-on photomultiplier tube, a high-speed counting circuit, and a built-in high-voltage power supply, designed for photon detection with a +5 V input. It features a 25-mm diameter effective photosensitive area and operates with a peak sensitivity at 420 nm. The device supports a maximum count rate of 5.0 × 10⁶ s⁻¹, has a typical dark count of 100 s⁻¹, and a pulse-pair resolution of 20 ns. It outputs 2.2 V pulses with a 10 ns width into a 50 Ω load, using positive logic. Operating temperature ranges from +5 to +40 °C, storage temperature from -20 to +50 °C, and it weighs 260 g. The unit is not for use in vacuum or reduced-pressure environments.
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.
| Hamamatsu Photonics Europe | |
|---|---|
| Product Category | Photomultiplier Tubes |
| Product Number | H11123 |
| Product Name | Photon counting head PMT modules |
| Photomultiplier Type | End-on |
