H7828_15 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Compact Head-on PMT

Compact Head-on PMT
Photon Counting Head H7828 Series
The H7828 series is a photon counting head device containing a 19-mm (3/4")
diameter head-on photomultiplier tube, a high-speed photon counting circuit,
and a high-voltage power supply circuit. The high voltage supply for photomul-
tiplier tube and the discrimination level are preset to optimum values, 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 diame-
ter, so the incident light can be collected very efficiently. Compared to other
PMT modules, the H7828 series has higher resistance to vibration and shock,
making them suitable for portable or mobile measurement equipment.
Product Variations
Type No. Spectral Response
H7828
300 nm to 650 nm For visible range
H7828-01
300 nm to 850 nm For visible to near IR range
This product can't be used at vacuum environment or reduced pressure environment.
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
Min.
3.0
Output Pulse Height *³
Typ.
3.5
Recommended Load Resistance
50
Signal Output Logic
Positive logic
Operating Ambient Temperature *⁴
+5 to +40
Storage Temperature *⁴
-20 to +50
Weight
70
*1: Random pulse, at 10 % count loss
*2: After 30 minutes storage in darkness
*3: With input voltage +5 V, Load resistance 50 Ω and Coaxial cable RG-174/U (450 mm)
*4: No condensation
58
H7828-01
380
1.7 × 10⁵
2.1 × 10⁵
1.6 × 10⁵
1.0 × 10⁵
5.9 × 10⁴
2000
3500
(at +25 °C)
Unit
V
V
mA
mm
nm
s^-1·pW^-1
s^-1
s^-1
ns
ns
V
Ω
—
°C
°C
g