18 specifications the h7422 series are photosensor modules with an internal high-voltage power supply circuit and a cooler installed to the metal package photomultiplier tube. effi- cient cooling was achieved by placing the cooler near the photomultiplier tube to reduce thermal noise emitted from the photocathode and a high s/n ratio can be obtained even at extremely low light levels. the h7422-40 has high sensitivity in the 300 nm to 720 nm wavelengths. the h7422-50 is sensitive along a wide spectral range from 380 nm to 890 nm. the photomultiplier tube is maintained at a constant temperature by monitoring the output from a thermistor installed near the photomultiplier and then regulating the current to the thermoelectric cooler. *1: control voltage = +0.8 v pmt setting temperature 0 c, used with c8137-02 and a7423 *2: after 30 minutes storage in darkness *3: plateau voltage = control voltage, pmt setting temperature 0 c, used with c8137-02 and a7423 *4: cable rg-174/u, cable length 450 mm, load resistance = 1 m ?, load capacitance = 22 pf *5: the time required for the output to reach a stable level following a change in the control voltage from +1.0 v to +0.5 v. *6: no condensation type no. h7422-40 h7422p-40 h7422-50 h7422p-50 300 nm to 720 nm 380 nm to 890 nm 2 a gaasp photocathode, qe 40 % at peak wavelength, high gain (p type) gaas photocathode, qe 12 % at peak wavelength, high gain (p type) for photon counting for photon counting spectral response max. output signal current features parameter h7422-40 h7422-50 input voltage max. input voltage for main unit max. input current for main unit max. input voltage for thermoelectric cooler max. input current for thermoelectric cooler max. output signal current max. control voltage recommended control voltage adjustment range effective area sensitivity adjustment range peak sensitivity wavelength rise time * 1 ripple noise * 1 * 4 (peak to peak) settling time * 5 operating ambient temperature * 6 storage temperature * 6 weight 580 108 176 8.8 10 4 0.4 1.0 1.8 10 5 100 300 800 15 50 90 2.5 10 4 0.5 1.3 5.0 10 4 125 375 +11.5 to +15.5 +18 62 2.6 2.2 2 +0.9 (input impedance 100 k ? ) +0.5 to +0.8 5 1: 50 1.00 0.6 0.2 +5 to +35 -20 to +50 approx. 400 unit v v ma v a a v v mm nm ma/w a/w na a/w s -1 ns mv s c c g radiant sensitivity radiant sensitivity * 1 dark current * 1 * 2 radiant sensitivity * 3 dark count * 2 * 3 420 nm 550 nm 800 nm 550 nm ty p. max. 550 nm ty p. max. ty p. max. ty p. ty p. ty p. ty p. cathode anode p type standard type (at +25 c) this product can't be used at vacuum environment or reduced pressure environment. metal package pmt with cooler photosensor modules h7422 series heatsink with fan (a7423) sold separately product variations
19 characteristics (cathode radiant sensitivity, gain) block diagram dimensional outlines (unit: mm) cooling specifications tpmob0135ec tpmob0136ec tpmoc0144eb tpmoa0024ed signal output (current output) gnd vcc hv power supply / voltage divider circuit pmt thermo- electric cooler power input for thermoelectric cooler thermistor control voltage input (+0.5 v to +0.8 v) ( ? t) * 7 wavelength (nm) cathode radiant sensitivity (ma/w) 1000 100 10 1 0.1 200 400 600 800 1000 h7422-40 h7422-50 control voltage (v) gain 10 7 10 6 10 5 10 4 10 3 0.5 0.7 1.0 0.6 0.8 0.9 h7422p-40/-50 h7422-40/-50 parameter cooling method max. cooling temperature cooling time * 7 thermoelectric cooling 35 approx. 5 c min h7422 series unit *7: input current to thermoelectric cooler=2 a in order to protect the pmt module from being damaged by excessive light, the h7422-40/50 has a protective function circuit. the circuit automatically turns off high voltage if the output current exceeds the preset current limit (approx. 10 a). this protection circuit works whenever the preset cur- rent limit is exceeded, even for a short moment. an exam- ple of this function could be in applications such as laser scanning microscopes where the output current may mo- mentarily exceed the preset current limit. this will trigger the protection circuit and interrupt measurement. in such applications, if the average output current is lower than the pmt module maximum rating (2 a), we can change the current limit in the protection circuit up to approximately 50 a. this means that pmt module operation continues with- out turning off high voltage even if a momentary high output occurs. users can choose this option when ordering. current output type photosensor modules a fa d eb c g a: thermistor 1 b: thermistor 2 c: thermoelectric cooler + d: thermoelectric cooler e: low voltage input(+15 v) f: control voltage input (+0.5 v to +0.8 v) g: gnd 7.2 10.2 m25.4 p=1/32" c-mount 4.0 0.1 6.4 0.2 7.4 0.2 14.8 0.2 photocathode window pmt a cross section b cross section c cross section 2.0 0.2 m3 depth: 4.0 max. 6.5 0.2 m3 depth: 4.0 max. 20.0 0.2 20.0 0.2 36.0 0.3 9.5 0.1 9.5 0.1 44.0 0.2 56.0 0.3 16.3 0.2 19.0 0.2 25.0 0.2 104 1 53.6 0.2 25.4 0.2 15.0 0.2 26.0 0.2 18.5 0.2 22.2 0.2 m25.4 p = 1/32" c-mount mounting threaded hole (4-m3 b ) threaded hole for a7412 (4-m2 depth: 2) o-ring groove (s-28 o-ring included) 8-m3 ca photocathode 5 threaded hole for a7423 (8-m3 depth: 2) power input tajimi prc03-23a10-7m signal output bnc-r top view side view front view guide mark tajimi prc03-23a10-7m 16.3 0.2
20 metal package pmt with cooler h7422 series option tpmoc0145ec heatsink with fan a7423 the temperature of the h7422 outer case rises due to the ther- moelectric cooler housed in the case. the a7423 heatsink effi- ciently radiates away this heat to prevent a temperature rise in the h7422. the a7423 can be easily installed onto the h7422 with four m3 screws. apply a heat conductive grease onto the joint surface shared by the h7422 and a7423. signal cable e1168-05 this signal cable is terminated with a bnc connector for easi- ly connecting the h7422 to external equipment. optical fiber adapter (fc type) a7412 the a7412 is an fc type optical fiber connector that attaches to the light input window of the h7422. the a7412 can easily be secured in place with four m2 screws. c-mount adapter a7413 the a7413 mount adapter is used when a c-mount lens pro- truding 4 mm or more from the flange-back must be installed onto the h7422. power supply unit with temperature control c8137-02 the c8137-02 is a power supply unit with a temperature con- trol function. just connecting to an ac source of 100 v to 240 v generates the output voltages for the thermoelectric cooler and the a7423 fan, needed for operating the h7422. the pho- tomultiplier tube temperature can be maintained to 0 c by monitoring the thermistor and regulating the output current for the thermoelectric cooler. control voltage can be varied by a knob on the front panel. sold separately power input ac 100 v to ac 240 v signal cable e1168-05 signal output cables (supplied with m9012 or c8137-02) heatsink with fan a7423 photosensor module h7422 series 1 3 power supply unit with temperature control c8137-02 6 on on optical fiber adapter a7412 c-mount adapter a7413 optical fiber direct c-mount lens sample 4 5 input 12 v power supply unit with temperature control m9012 2 chk4 cn5 chk3 sw1 on sw2 don't use vcont-adj cn04 cn03 chk2 chk1 cn01 vcont gnd 6 5 4 3 2 1 parameter value input voltage input current operating voltage weight 12 140 90 10.2 to 13.8 120 unit v ma ma v g during lock during operation power supply unit with temperature control m9012 the m9012 is an on-board type power supply unit. by just connecting to 12 v supply, the m9012 provides power necessary to operate the h7422 series. the m9012 also controls the thermoelectric cooler in the h7422 series so that the output and noise can be maintained at constant levels even when the ambient temperature changes. the thermoelectric cooler and pmt operation can be controlled from an external device by connecting it to the i/o connector on the m9012. parameter description / value max. cooling temperature ( ? t) input voltage max. input current max. power consumption main circuit output voltage max. output current for thermoelectric cooler output voltage for fan max. control output voltage max. control input voltage control signal input voltage error signal output voltage led output setting cooling temperature weight (excluding cables) thermoelectric cooler pmt fan thermoelectric cooler pmt pmt error 35 12 1.2 15.8 12 2.2 12 1.26 0.9 non-insulated ttl level input non-insulated ttl level input non-insulated ttl level input non-insulated ttl level output non-insulated ttl level output 5 5 0 120 unit c v a v? v a v v v v c g parameter value max. cooling temperature ( ? t) setting cooling temperature (preset at factory) ac input voltage input voltage frequency power consumption main circuit output voltage max. current for thermoelectric cooler output voltage for fan control voltage adjustment range weight 35 100 to 240 50 / 60 30 +15 2.2 12 0 to +0.9 1.1 unit c v hz v? v a v v kg 0 c
21 current output type photosensor modules h7422 series options (unit: mm) tacca0188ed tacca0251ea tacca0238eb power supply unit with temperature control c8137-02 tacca0191ea c-mount adapter a7413 4 14 m25.4 p=1/32" c-mount 30 m25.4 p=1/32" c-mount 22 8 tacca0190eb optical fiber adapter (fc type) a7412 m8 p=0.75 9.5 15 5.5 3 9 4- 2.2 4 tapered depth 1.5 3.0 2.5 4-m2 l=3 light shield sheet (thickness: 0.5) side view front view tacca0148ea signal cable e1168-05 1500 +50 -0 bnc-p bnc-p power supply unit with temperature control m9012 jst xmr-02v 16.5 0.3 22.2 0.2 52.0 0.5 top view side view 4-m3 (supplied) 24.5 0.5 40 1 19.2 0.3 53.6 0.3 92.0 0.5 lead length 50 10 fan cable power cable external i/o cable external i/o housing module cable 1500 50 1500 50 1000 50 1000 50 chk4 cn5 chk3 sw1 on sw2 don't use vcont-adj cn04 cn03 chk2 chk1 cn01 vcont gnd 6 5 4 3 2 1 4-m2 50.0 0.2 28.0 0.2 70.0 0.1 15.0 0.1 40.0 0.1 5.0 0.1 17.5 0.2 100.0 0.3 13.8 0.2 heatsink with fan a7423 1 2 3 6 5 4 1500 1500 1800 to 2000 power cable fan cable ac cable on on 46.0 0.5 module output ac input fan output photosensor switch control voltage adjustable dial power switch fuse 42 8 212 1 12.5 16.0 0.5 front view side view rear view +50 -0 +50 -0 control voltage display
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