R2257_15 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE

PHOTOMULTIPLIER TUBE
R2257
For Visible to Near IR Low Light Detections
Extended Red Multialkali Photocathode
51mm (2 Inch) Diameter, 12-stage, Head-on Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
MateriaI
Minimum Effective Area
Window Material
Dynode
Structure
Number of Stages
Direct Interelectrode
Anode to Last Dynode
Capacitances
Anode to All Other Electrodes
Operating Ambient Temperature
Storage Temperature
Base
Suitable Socket
Description / Value
300 to 900
600
Extended red multialkali
46
Borosilicate glass
Linear focused
12
2
2.5
-30 to +50
-80 to +50
21-pin glass base
E678-21C (supplied)
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
Average Anode Current
Value
2700
500
0.2
CHARACTERISTICS (at 25 °C)
Parameter
Luminous (2856 K)
Cathode Sensitivity
Radiant at 600 nm
Red / White Ratio (R-68 filter)
Anode Sensitivity
Luminous (2856 K)
Radiant at 600 nm
Gain
Anode Dark Current (after 30 min. storage in darkness)
Time Response
Anode Pulse Rise Time
Electron Transit Time
Min.
140
—
—
15
—
—
—
—
—
NOTE: Anode characteristics are measured with the voltage distribution ratio shown below.
Typ.
230
50
0.35
100
2.2 × 10⁴
4.3 × 10⁵
30
2.6
48
Max.
—
—
—
—
—
—
100
—
—
Unit
nm
nm
—
mm
—
—
—
pF
pF
°C
°C
—
—
Unit
V
V
mA
Unit
µA/lm
mA/W
—
A/lm
A/W
—
nA
ns
ns
VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE
Electrodes
Ratio
K G Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11 Dy12 P
4
0
1 1.4 1
1
1
1
1
1
1
1
1
1
SuppIy Voltage: 1500 Vdc, K: Cathode, Dy: Dynode, G: Grid, P: Anode
∗Shield is connected to Dy5.
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 HAMAMATSU 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. ©2010 Hamamatsu Photonics K.K.