PHOTON COUNTING HEADS H12386 SERIES OVERVIEW The H12386 series is a photon counting head device consisting of a metal package photomultiplier tube, along with a high-speed photon counting circuit and a high-voltage power supply circuit. The high voltage supply for photomultiplier tube and the discrimination level are preset to optimum values, allowing photon counting measurement by just connecting a +5 V supply. The H12386 series has also over light detection function to output a signal at the state that an output count falls by excessive incident light. By this signal, measurement data can be judged that it is normal or not. PRODUCT VARIATIONS Type No. H12386-110 H12386-210 H12386-01 Photocathode Super bialkali Ultra bialkali Multialkali Features For visible range For visible range, high sensitive than super bialkali For visible to near IR range This product can't be used at vacuum environment or reduced pressure environment. Parameter Input voltage Max. input voltage Max. input current Effective area Peak sensitivity wavelength 300 nm 400 nm 500 nm Count sensitivity 600 nm 700 nm 800 nm Count linearity *1 Dark count *2 Pulse-pair resolution Output pulse width Load resistance 50 Ω Output pulse height Un-terminated Recommended load resistance Signal output logic Over light High level Min. Max. detection output *3 Low level Operating ambient temperature *4 Storage temperature *4 Weight *1: Random pulse, at 10 % count loss *2: After 30 minutes storage in darkness Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office. Information furnished by HAMAMATSU is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are subject to change without notice. No patent rights are granted to any of the circuits described herein.

PHOTON COUNTING HEADS H12386 SERIES Figure 1: Count sensitivity 106 Figure 2: Dark count Figure 3: Output waveform OUTPUT PULSE HEIGHT (1 V/div.) Figure 4: Count rate linearity and over light detection output 1010 Figure 5: Count rate linearity correction OUTPUT COUNT 108 107 106 OVER LIGHT DETECTION OUTPUT Correction Formula N : Real Count Rate (s-1) M : Measured Count Rate (s-1) t : Pulse Pair Resolution (s) RELATIVE INPUT LIGHT Figure 6: Block diagram OPTIONS AMPLIFIER PULSE COMPARATOR SHAPER OUTPUT TO PULSE COUNTER POSITIVE LOGIC HIGH VOLTAGE POWER SUPPLY CIRCUIT OPTICAL FIBER ADAPTER (Unit:...