H7828 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Compact Head-on PMT

Compact Head-on PMT
Photon Counting Head H7828 Series
The H7828 series are photon counting head devices using a 19 mm (3/4") di-
ameter head-on photomultiplier tube, high-speed photon counting circuit, and
high-voltage power supply circuit. The high voltage supply for photomultiplier
tube and the discrimination level are preset to optimum levels, allowing photon
counting measurement by just connecting a +5 V supply. Despite its compact
size, the effective photosensitive area is as large as 15 mm in diameter, so the
incident light can be collected very efficiently. Compared to other PMT mod-
ules, the H7828 series devices have higher resistance to vibration and shock,
making them suitable for portable or mobile measurement equipment. Two
types of photomultiplier tubes with different spectral response characteristics
are provided for measurement in the visible range or visible to near IR range.
Product Variations
Type No.
H7828
H7828-01
Spectral Response
300 nm to 650 nm
300 nm to 850 nm
For visible range
For visible to near IR range
Features
Specifications
Parameter
H7828
Input Voltage
+4.5 to +5.5
Max. Input Voltage
+6
Max. Input Current
60
Effective Area
15
Peak Sensitivity Wavelength
420
300 nm
2.1 × 10⁵
Count
Sensitivity ^Typ.
400 nm
500 nm
600 nm
3.6 × 10⁵
2.8 × 10⁵
5.0 × 10⁴
700 nm
—
Count Linearity *¹
1.5 × 10⁶
Typ.
200
Dark Count *²
Max.
500
Pulse-pair Resolution
70
Output Pulse Width
30
Typ.
3.5
Output Pulse Height *³
Min.
3.0
Recommended Load Resistance
50
Signal Output Logic
Positive logic
Operating Ambient Temperature
+5 to +40
Storage Temperature
-20 to +50
Weight
70
*1: Random pulse, at 10 % count loss
*2: After 30 minute storage in darkness
*3: With input voltage +5 V, Load resistance 50 Ω and Coaxial cable RG-174/U (450 mm)
H7828-01
380
1.7 × 10⁵
2.1 × 10⁵
1.6 × 10⁵
1.0 × 10⁵
5.9 × 10⁴
2000
3500
46
Unit
V
V
mA
mm
nm
s^-1·pW^-1
s^-1
s^-1
ns
ns
V
Ω
—
°C
°C
g