62 specifications product variations 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 val- ues, 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 in- cident light can be collected very efficiently. metal package pmt photon counting head H11123 parameter input voltage max. input voltage max. input current effective area peak sensitivity wavelength count sensitivity count linearity * 1 dark count * 2 pulse-pair resolution output pulse width output pulse height * 3 recommended load resistance signal output logic operating ambient temperature storage temperature * 4 weight +4.75 to +5.25 +6 70 25 420 1.9 10 5 4.4 10 5 3.6 10 5 1.1 10 5 5.0 10 6 100 200 20 10 2.0 2.2 50 positive logic +5 to +40 -20 to +50 260 unit v v ma mm nm s -1 ?w -1 s -1 s -1 ns ns v ? c c g value 300 nm 400 nm 500 nm 600 nm ty p. max. ty p. ty p. min. ty p. ty p. *1: random pulse, at 10 % count loss *2: after 30 minutes storage in darkness *3: with input voltage +5 v, load resistance 50 ? *4: no condensation (at +25 c) type no. H11123 300 nm to 650 nm high detection efficiency spectral response features this product can't be used at vacuum environment or reduced pressure environment.
63 characteristic ( count sensitivity) block diagram dimensional outlines (unit: mm) tpmob0229ea tpmob0230ea tpmoc0223ea pmt comparator pulse shaper + - hv power supply / voltage divider circuit lld r l 50 ? output to pulse counter +5 v gnd amp positive logic power input wavelength (nm) count sensitivity (s -1 pw -1 ) 10 6 10 5 10 4 10 3 200 300 400 500 600 700 800 ambient temperature ( c) dark count (s -1 ) 10 4 10 2 10 3 10 1 10 0 5 10152025303540 tpmoa0065ea 28.5 0.5 192 1 450 20 35.0 0.5 effective area 25 min. low voltage input (+5 v) gnd signal output : awg26 (red) : awg26 (black) : rg-174/u front view side view photon counting heads
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