H8259 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – Side-on PMT

Side-on PMT
Photon Counting Head H8259 Series
The H8259 series are photon counting head devices containing a 28 mm (1-
1/8") diameter side-on photomultiplier tube, high-speed photon counting cir-
cuit, and high-voltage power supply circuit. Three types of photomultiplier tubes
are provided as standard lineups to meet various needs for spectral response
range. The photomultiplier tube sensitive in the near IR region usually has a
large dark count due to thermal noise but high S/N measurements can be ob-
tained since a low-noise photomultiplier tube is selected. The high voltage sup-
ply for photomultiplier tube and the discrimination level are preset to optimum
levels, allowing photon counting measurement by just connecting a +5 V supply.
An electronic gate circuit (shutter circuit) is also included to eliminate extrane-
ous light such as excitation light from the measurement.
Product Variations
Type No.
H8259
H8259-01
H8259-02
Spectral Response
185 nm to 680 nm
185 nm to 850 nm
185 nm to 900 nm
Features
Low dark count in UV to visible range
Low dark count in UV to near IR range
High sensitivity and low dark count in UV to near IR range. Sensitive area 4 mm × 6 mm
Specifications
Parameter
H8259
H8259-01
Input Voltage
+4.5 to +5.5
Max. Input Voltage
+6
Max. Input Current
80
Effective Area
4 × 20
Peak Sensitivity Wavelength
400
430
300 nm
2.1 × 10⁵
2.7 × 10⁵
400 nm
2.6 × 10⁵
3.3 × 10⁵
Count
Typ.
Sensitivity
500 nm
600 nm
700 nm
1.9 × 10⁵
7.5 × 10⁴
1.5 × 10³
3.2 × 10⁵
2.3 × 10⁵
6.8 × 10⁴
800 nm
—
1.6 × 10⁴
900 nm
—
—
Count Linearity *¹
2.5 × 10⁶
Typ.
30
80
Dark Count *²
Max.
80
200
Mode
Normally ON
Switching Ratio
1/1000
Level
C-MOS (High level: +3.5 V to +5.0 V)
Input Impedance
Gate Width (FWHM)
1
50 µs to ∞
Repetition Rate Max.
10
Pulse-pair Resolution
35
Output Pulse Width
30
Output Pulse Height *^{3 Typ.}
2.2
Min.
2.0
Recommended Load Resistance
50
Signal Output Logic
Positive logic
Operating Ambient Temperature
+5 to +40
Storage Temperature
-20 to +50
Weight
220
*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)
44
H8259-02
4×6
400
2.5 × 10⁵
3.0 × 10⁵
2.5 × 10⁵
2.0 × 10⁵
1.4 × 10⁵
7.5 × 10⁴
3.0 × 10²
400
800
Unit
V
V
mA
mm
nm
s^-1·pW^-1
s^-1
s^-1
—
—
—
kΩ
—
kHz
ns
ns
V
Ω
—
°C
°C
g