hamamatsu C9744 Photon counting unit

hamamatsu C9744 Photon counting unit

Download datasheet C9744

Photon counting unit is designed to convert single photoelectron pulses from a photomultiplier tube (PMT)
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.

Input impedance    50    Ω
Discrimination level (input conversion)    -0.4 to -16    mV
Required PMT gain    Approx. 3 × 106    -
Prescaler    ÷1 / ÷10    -
Count linearity    ÷1    4 × 106    s-1
÷10    1 × 107
Pulse-pair resolution    ÷1    25    ns
÷10    10
Output pulse    CMOS 5 V, POSITIVE LOGIC    -
Output pulse width    ÷1    10    ns
÷10    Depends on count rate    -
Supply voltage    +5.0 V ± 0.2 V, 130 mA / -5.0 V ± 0.2 V, 50 mA    -
Connector    Input    BNC-R    -
Output    BNC-R    -
Power    DIN (6-pin) *1    -
Dimensions （W × H × D）    90 × 32 × 140 (excluding rubber feet and projecting parts)    mm
Operating ambient temperature    0 to +50    ℃
Operating ambient humidity *2    Below 80    %
Storage temperature    -15 to +60    ℃
Storage humidity *2    Below 85    %
Weight    Approx. 250    g