R7449 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTlPLlER TUBE

PHOTOMULTlPLlER TUBE
R7449
28mm(1–1/8 Inch) Diameter, 11–stage, Bialkali Photocathode,
Head–On Type, Low Dark Current, High Stability
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Window MateriaI
MateriaI
Minimum Effective Area
Dynode
Structure
Number of Stages
Base
Suitable Socket
Description/Value
185 to 650
420
Bialkali
25
UV glass
Box and Line
11
14–pin glass base
E678–14C (supplied)
Unit
nm
nm
mm dia.
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
0.1
-80 to +50
Unit
Vdc
Vdc
mA
°C
CHARACTERISTlCS (at 25 °C )
Cathode
Sensitivity
Parameter
Luminous (2856K)
Radiant at 420nm
Blue (CS–5–58 filter)
Min.
60
Typ.
95
88
11
Anode
Luminous (2856K)
Sensitivity
Radiant at 420nm
Gain
Anode Dark Current (after 30min. storage in darkness)
50
200
1.8 × 10⁵
2.1 × 10⁶
2
Anode Pulse Rise Time
4
Time Response
Electron Transit Time
30
Transit Time Spread (FWHM)
3
NOTE: Anode characteristics are measured with the voItage distribution ratio shown below.
Max.
10
Unit
µ A/lm
mA/W
µ A/lm-b
A/lm
A/W
nA
ns
ns
ns
VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE
Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11 P
Ratio
1
1
1
1
1
1
1
1
1
1
1
1
SuppIy Voltage : 1000Vdc, K : Cathode, Dy : Dynode, P : Anode
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
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. _© 2000 Hamamatsu Photonics K.K.