H7422_15 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – Metal Package PMT with Cooler

Metal Package PMT with Cooler
Photosensor Modules H7422 Series
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.
Heatsink with fan (A7423) sold separately
Product Variations
Type No.
H7422-40
H7422P-40
H7422-50
H7422P-50
Spectral Response Max. Output Signal Current
300 nm to 720 nm
380 nm to 890 nm
2 µA
Features
GaAsP photocathode, QE 40 % at peak
wavelength, high gain (P type)
GaAs photocathode, QE 12 % at peak
wavelength, high gain (P type)
This product can't be used at vacuum environment or reduced pressure environment.
For photon counting
For photon counting
Specifications
Parameter
H7422-40
H7422-50
Input Voltage
+11.5 to +15.5
Max. Input Voltage for Main Unit
+18
Max. Input Current for Main Unit
62
Max. Input Voltage for Thermoelectric Cooler
2.6
Max. Input Current for Thermoelectric Cooler
2.2
Max. Output Signal Current
2
Max. Control Voltage
+0.9 (Input impedance 100 kΩ)
Recommended Control Voltage Adjustment Range
+0.5 to +0.8
Effective Area
5
Sensitivity Adjustment Range
1: 50
Peak Sensitivity Wavelength
580
800
420 nm
108
15
Radiant Sensitivity Typ. 550 nm
176
50
800 nm
—
90
Radiant Sensitivity *¹ Typ. 550 nm
8.8 × 10⁴
2.5 × 10⁴
Dark Current *¹ *^{2 Typ.}
0.4
0.5
Max.
1.0
1.3
Radiant Sensitivity *³ Typ. 550 nm
1.8 × 10⁵
5.0 × 10⁴
Dark Count *² *³
Typ.
100
125
Max.
300
375
Rise Time *¹
Typ.
1.00
Ripple Noise *¹ *⁴ (peak to peak) Max.
0.6
Settling Time *⁵
Typ.
0.2
Operating Ambient Temperature *⁶
+5 to +35
Storage Temperature *⁶
-20 to +50
Weight
Approx. 400
*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 MΩ, 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
18
(at +25 °C)
Unit
V
V
mA
V
A
µA
V
V
mm
—
nm
mA/W
A/W
nA
A/W
s^-1
ns
mV
s
°C
°C
g