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Photon counting head

H11123

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The H11123 is a photon counting head device consisting of a 28 mm (1-1/8") diameter head-on photomultiplier tube, a high-speed photon counting circuit, and a high-voltage power supply circuit. The high voltage power 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 H11123 can operate at high count rate. The effective photosensitive area is as large as 25 mm in diameter, so the incident light can be collected very efficiently.

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Specifications

Photocathode Area Shape Round
Photocathode Area Size Dia.25 mm
Wavelength (Short) 300 nm
Wavelength (Long) 650 nm
Wavelength (Peak) 420 nm
Dimension (W x H x D) Dia. 35 x 192 mm
Input Voltage +4.75 to +5.25 V
Max. Input Voltage 6 V
Max. Input Current 70 mA
Count Senstitivity at 300 nm Typ. 1.9 x 105 s-1・pW-1
Count Senstitivity at 400 nm Typ. 4.4 x 105 s-1・pW-1
Count Senstitivity at 500 nm Typ. 3.6 x 105 s-1・pW-1
Count Senstitivity at 600 nm Typ. 1.1 x 105 s-1・pW-1
Count Linearity 5.0 x 106 s-1
Dark Count Typ. 100 s-1
Dark Count Max. 200 s-1
Pulse-pair Resolution 20 ns
Output Pulse Width 10 ns
Output Pulse Height Min. 2 V
Output Pulse Height Typ. 2.2 V
Recommended Load Resistance 50 Ω
Signal Output Logic Positive logic
Operating Ambient Temperature +5 to +40 ℃
Storage Temperature -20 to +50 ℃
Weight 260 g

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