R3991 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE

PHOTOMULTIPLIER TUBE
R3991
Ruggedized, High Temperature (175°C) PMT for Oil Well Logging (MWD)
19 mm (3/4 Inch) Diameter, 10-stage, Head-On Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Effective Area
Window Material
Dynode
Structure
Number of Stages
Description/Value
300 to 650
375
High temp. bialkali
15
Borosilicate glass
Circular-cage
10
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
Average Anode Current
Ambient Temperature
Value
1800
250
0.02
-80 to +175
CHARACTERISTICS (at 25°C)
Parameter
Cathode Sensitivity
Luminous (2856K)
Blue (CS-5-58 filter)
Anode Sensitivity
Luminous (2856K)
Gain
Anode Dark Current (after 30min. storage in darkness)
Time Response
Anode Pulse Rise Time
Electron Transit Time
Min.
20
4
5
—
—
—
—
* ^{1000nA at 175°C}
NOTE: Anode characteristics are measured with the voltage distribution ratio shown below.
Typ.
40
6
15
3.75 × 10⁵
0.1 _*
1.0
13
VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 P
Ratio
3
1
1
1
1
1
1
1
1
1
1
Supply Voltage: 1500Vdc, K: Cathode, Dy: Dynode, P: Anode
ENVIRONMENTAL TESTING
Shock ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 1000g's, 0.5ms, 3 impact shocks per direction (6 directions)
Vibration ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ ⋅ 30g's, 50 to 2000Hz, 1 oct per minute, 3 sweeps per axis (3 axes)
Max.
—
—
—
—
10
—
—
Unit
nm
nm
—
mm dia.
—
—
—
Unit
Vdc
Vdc
mA
°C
Unit
µA/lm
µA/lm-b
A/lm
—
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.