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).
|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|
* counting and spectral characteristics correspond to specification of PMT