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Photon counting system Photocor-PC
Photocor-PC consists of photon counting unit and power supply. Photon counting unit includes collimating optical system, single-photon PMT and amplifier-discriminator. Two models of the photon counting units are available:
Photocor-PC1: Single-PMT unit for routine measurements.
Photocor-PC2: Quasi-crosscorrelation two-PMT unit for precise wide-range particle sizing including the smallest particles in range of 1-10 nm (shown on the photo).
Specifications
| Output pulse level | TTL (+2.5 V) |
| Pulse width | 10 ns |
| Nonlinearity | 3% to 1 Mcps |
| Quantum efficiency | 10% (at 633nm) |
| Maximal count rate | 25 Mcps |
| Dark count rate | < 300 cps |
| PMT | Hamamatsu R6358-10 * |
| Power supply | -1000 V, +5 V, -5 V |
| Dimensions | 160 x 70 x 60 mm |
| Weight | 0.7 kg |
* counting and spectral characteristics correspond to specification of PMT