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Photon Counters - 7218 Photon Counters

SR430  5 ns multichannel scaler/averager

SR430 Multichannel Scaler/Averager · 5 ns to 10 ms bin width · Count rates up to 100 MHz · 1k to 32k bins per record · Built-in discriminator · No interchannel dead time · On-screen data analysis · Hardcopy output to printers/plotters · DOS compatible 3.5" drive · GPIB and RS-232 interfaces · SR430 ... $7950

The SR430 is the first multichannel scaler which combinesamplifiers, discriminators, bin clocks, and data analysis in a single, integrated instrument. With its many features and its easy-to-use menu driven interface, the SR430 simplifies time- resolved photon counting experiments.The SR430 Multichannel Scaler/Averager can be thought ofas a photon counter that counts events as a function of time. Atrigger starts the counter which segments photon count datainto sequential time bins (up to 32k bins). The width of the bins can be set from 5 ns to 10 ms. The instrument records the number of photons that arrive in each bin. The SR430 is useful in a variety of applications where it isnecessary to count events as a function of time: LIDAR, time of flight mass spectroscopy, and fluorescence decay measurements are just a few examples. − 0.7 V, active low) signal corresponding to each count. Input and Discriminator The SR430’s analog input has a 50 Ω input impedance and aninput range of ±300 mV. The maximum input sensitivity is 10 mV, and if your input signal level is less than this, a preamplifier (like the SR445A) is recommended. The input is followed by a discriminator with a selectable slope and a threshold adjustable between ±300 mV. Adiscriminator BNC output is provided at the front panel that generates a NIM level (0 to
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