R2557 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTlPLlER TUBE

PHOTOMULTlPLlER TUBE
R2557
For Photon Counting, Low Light Level Detection
13mm(1/2 Inch) Diameter, Low Noise Bialkali Photocathode
Borosilicate Glass Window, 10–stage, Head–On Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
MateriaI
Minimum Effective Area
Window Material
Dynode
Direct Interelectrode
Capacitances
Structure
Number of Stages
Anode to Last Dynode
Anode to All Other Electrodes
Base
SuitabIe Socket
Description/Value
300 to 650
375
Low noise bialkali
10
Borosilicate glass
Linear focused
10
1.0
2.0
13–pin glass base
E678–13A(supplied)
Unit
nm
nm
mm dia.
pF
pF
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
Avarage Anode Current
Ambient Temperature
Value
1500
250
0.03
–80 to +50
Unit
Vdc
Vdc
mA
CHARACTERISTlCS (at 25 )
Parameter
Luminous (2856K)
Cathode Sensitivity
Anode Sensitivity
Radiant at 375nm
Blue (CS–5–58 filter)
Luminous (2856K)
Radiant at 375nm
Gain
Anode Dark Current (after 30min. storage in darkness)
Anode Dark Counts
Time Response
Anode Pulse Rise Time
Electron Transit Time
Min.
25
3.5
50
Typ.
40
50
5.5
200
2.5 10⁵
5.0 10⁶
0.5
10
2.2
22
NOTE: Anode characteristics are measured with the voItage distribution ratio shown below.
Max.
4.0
30
Unit
A/lm
mA/W
A/lm b
A/lm
A/W
nA
cps
ns
ns
VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE
Electrodes
Ratio
K
Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 P
2
1
1
1
1
1
1
1
1
1
1
SuppIy Voltage : 1250Vdc, 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.
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. _© 1991 Hamamatsu Photonics K.K.