Photon counting unit C9744

Photon counting unitPhoton counting unit is designed to convert single photoelectron pulses from a photomultiplier tube into 5 V digital signals by use of the built-in amplifier and discriminator circuits. Photon counting with a high S/N ratio can be performed by simply connecting a counter to the output of the photon counting unit. The C9744 uses a high-speed electronic circuit that allows measurement with an excellent output linearity up to 107 s-1. The C9744 also has a prescaler (division by 10) eliminating the need for a high-speed counter. Click here to view a full product spec sheet PDF. Product Specifications Device types Photon counting unit Input impedance 50 Ω Discrimination level (input conversion) -0.4 to -16 mV Required PMT gain Approx. 3 x 106 Prescaler ÷1 / ÷10 Count linearity (÷1) 4 x 106 s-1 (÷10) 1 x 107 s-1 Pulse-pair resolution (÷1) 25 ns (÷10) 10 ns Output pulse width (÷1) 10 ns (÷10) Depends on count rate Package Enclosed M