PHOTOMULTlPLlER TUBE
R3998鈥?2
For High Energy Physics and Scintillation Counting,
28mm(1鈥?/8 Inch) Diameter, Low Profile,
Bialkali Photocathode, 9鈥揝tage, Head鈥揙n Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
MateriaI
Material
Minimum Effective Area
Window Material
Structure
Dynode
Number of Stages
Base
SuitabIe Socket
Description / Value
300 to 650
420
Bialkali
25
Borosilicate glass
Box(3) and Line(6)
9
14鈥損in glass base
E678鈥?4C (Supplied)
Unit
nm
nm
mm dia.
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Between Anode and Cathode
Supply Voltage
Between Anode and Last Dynode
Avarage Anode Current
Ambient Temperature
Value
1500
250
0.1
鈥?0 to +50
Unit
Vdc
Vdc
mA
CHARACTERISTlCS (at 25
Cathode
Sensitivity
Anode Sensitivity
)
Min.
60
Typ.
90
85
10.5
120
1.1 10
5
1.3 10
6
2
3.4
23
Max.
Unit
A/lm
mA/W
A/lm b
A/lm
A/W
nA
ns
ns
Parameter
Luminous (2856K)
Radiant at 420nm
Blue (CS鈥?鈥?8 filter)
Luminous (2856K)
Radiant at 420nm
50
Gain
Anode Dark Current (after 30min. storage in darkness)
Anode Pulse Rise Time
Time Response
Electron Transit Time
10
NOTE:
Anode characteristics are measured with the voItage distribution ratio shown below.
VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE
K
G
Dy1
Dy2 Dy3 Dy4 Dy5
Dy6 Dy7
Dy8
Dy9
Electrodes
Ratio
3
1
1
1
1
1
1.5
1
1
1
1
SuppIy Voltage : 1000Vdc,
K : Cathode, Dy : Dynode, P : Anode, G : Grid
P
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
lnformation furnished by HAMAMATS U is believed to be reliabIe. However, no responsibility is assumed for possibIe inaccuracies or commission. Specifications are
subjected to change without notice. No patent right are granted to any of the circuits described herein.
漏
1996 Hamamatsu Photonics K.K.
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