R1893 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE

PHOTOMULTIPLIER TUBE
R1893
10 mm (3/8 Inch) Diameter, 8-Stage,
Cs-Te Photocathode, Head-On Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Effective Area
Window Material
Dynode
Structure
Number of Stages
Base
Suitable Socket
Description/Value
160 to 320
240
Cs-Te
8
Synthetic Silica
Linear-focused
8
11-pin glass base
E678-11N (supplied)
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
Average Anode Current
Ambient Temperature
Value
1500
250
0.01
-80 to +50
CHARACTERISTICS (at 25°C)
Parameter
Min.
Cathode Sensitivity
Anode Sensitivity
Gain
Radiant at 254nm
Radiant at 254nm
—
1.2 × 10³
—
Anode Dark Current (after 30min. storage in darkness)
—
Time Response
Anode Pulse Rise Time
Electron Transit Time
—
—
NOTE: Anode characteristics are measured with the voltage distribution ratio shown below.
Typ.
24
3.6 × 10³
1.5 × 10⁵
0.5
0.8
7.8
Max.
—
—
—
2.5
—
—
VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 P
Ratio
2
2
1
1
1
1
1
1
1
Supply Voltage: 1250Vdc, K: Cathode, Dy: Dynode, P: Anode
Unit
nm
nm
—
mm dia.
—
—
—
—
—
Unit
Vdc
Vdc
mA
°C
Unit
mA/W
A/W
—
nA
ns
ns
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Information furnished by HAMAMATS U is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein. _© 1999 Hamamatsu Photonics K.K.