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
Features
For visible range
For visible to near IR range
Specifications
Parameter
Input Voltage
Max. Input Voltage
Max. Input Current
Effective Area
Peak Sensitivity Wavelength
300 nm
400 nm
Count
Typ.
500 nm
Sensitivity
600 nm
700 nm
Count Linearity *
1
Typ.
Dark Count *
2
Max.
Pulse-pair Resolution
Output Pulse Width
Typ.
Output Pulse Height *
3
Min.
Recommended Load Resistance
Signal Output Logic
Operating Ambient Temperature
Storage Temperature
Weight
H7828
+4.5 to +5.5
+6
60
15
420
2.1
脳
10
5
3.6
脳
10
5
2.8
脳
10
5
5.0
脳
10
4
鈥?/div>
1.5
脳
10
6
200
500
70
30
3.5
3.0
50
Positive logic
+5 to +40
-20 to +50
70
H7828-01
380
1.7
脳
10
5
2.1
脳
10
5
1.6
脳
10
5
1.0
脳
10
5
5.9
脳
10
4
2000
3500
Unit
V
V
mA
mm
nm
s
-1
路pW
-1
s
-1
s
-1
ns
ns
V
鈩?/div>
鈥?/div>
掳C
掳C
g
*1: Random pulse, at 10 % count loss
*2: After 30 minute storage in darkness
*3: With input voltage +5 V, Load resistance 50
鈩?/div>
and Coaxial cable RG-174/U (450 mm)
46
1
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