H7155 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Photon Counting Head

Metal package PMT
Photon Counting Head H7155 Series
The H7155 series are compact photon counting head devices consisting of a
metal package photomultiplier tube along with a high-speed photon counting
circuit and a high-voltage power supply circuit. The high voltage supply for
photomultiplier tube and the discriminator level are preset to optimum values,
allowing photon counting measurement by just connecting a +5 V supply.
The H7155-20 has an internal prescaler of division by 4. This prescaler im-
proves the count linearity 4-fold compared to the H7155.
Product Variations
Type No.
H7155
H7155-20
Spectral Response
300 nm to 650 nm
Prescaler
No
Yes
Specifications
Parameter
H7155
H7155-20
Input Voltage
+4.5 to +5.5
Max. Input Voltage
+6
Max. Input Current
50
70
Effective Area
8
Peak Sensitivity Wavelength
420
300 nm
1.2 × 10⁵
1.2 × 10⁵ *²
Count Sensitivity
400 nm
500 nm
2.7 × 10⁵
2.2 × 10⁵
2.7 × 10⁵ *²
2.2 × 10⁵ *²
600 nm
2.1 × 10⁴
2.1 × 10⁴ *²
Count Linearity *¹
1.5 × 10⁶
10 × 10⁶ *²
Typ.
100
Dark Count *³
Max.
500
100 *²
500 *²
Pulse-pair Resolution
70
10
Output Pulse Width
30
Depends on count rate.
Typ.
3.6
2.2
Output Pulse Height *⁴
Min.
3.0
2.0
Recommended Load Resistance
50
Signal Output Logic
Positive logic
Operating Ambient Temperature
+5 to +40
Storage Temperature
-20 to +50
Weight
75
*1: Random pulse, at 10 % count loss
*2: Output count will be decreased to 1/4 after the prescaler.
*3: After 30 minute storage in darkness
*4: With input voltage +5 V, Load resistance 50 Ω and Coaxial cable RG-174/U (450 mm)
Unit
V
V
mA
mm
nm
s^-1·pW^-1
s^-1
s^-1
ns
ns
V
Ω
—
°C
°C
g
38