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R1250_15 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE
PHOTOMULTIPLIER TUBE
R1250
For High Energy Physics, Fast Time Response, High Pulse Linearity
127 mm (5 Inch) Diameter, Bialkali Photocathode, 14-Stage, Head-on Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Effective Area
Window Material
Dynode
Structure
Number of Stages
Operating Ambient Temperature
Storage Temperature
Base
Suitable Socket
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
Average Anode Current
CHARACTERISTICS (at 25 °C)
Parameter
Luminous (2856 K)
Cathode Sensitivity
Blue Sensitivity Index (CS 5-58)
Anode Sensitivity
Quantum Efficiency at 390 nm
Luminous (2856 K)
Blue Sensitivity Index (CS 5-58)
Gain
Anode Dark Current (after 30 min storage in darkness)
Time Response
Anode Pulse Rise Time
Electron Transit Time
Transit Time Spread
Pulse Height Resolution with 137Cs
Gain Deviation
Pulse Linearity *
Long Term
Short Term
2 % Deviation
5 % Deviation
NOTE: Measured with special voltage distribution ratios shown in the Table 2.
Description
300 to 650
420
Bialkali
120
Borosilicate glass
Linear focused
14
-30 to +50
-30 to +50
20-pin base
E678-20B (supplied)
Value
3000
500
0.2
Min.
55
7.0
—
300
—
—
—
—
—
—
—
—
—
—
—
Typ.
70
9.0
22
1000
130
1.4 × 107
50
2.5
54
1.2
8.3
1.0
1.0
160
250
Max.
—
—
—
—
—
—
300
—
—
—
—
—
—
—
—
Unit
nm
nm
—
mm
—
—
—
°C
°C
—
—
Unit
V
V
mA
Unit
µA/lm
—
%
A/lm
—
—
nA
ns
ns
ns
%
%
%
mA
mA
Table 1: VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
Electrode K G1 G2 Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11 Dy12 Dy13 Dy14 P
Ratio
2.5 7.5 0 1.2 1.8 1 1 1 1 1 1 1 1 1.5 1.5 3 2.5
Supply Voltage: 2000 Vdc, K: Cathode, Dy: Dynode, P: Anode, G: Grid
Table 2: SPECIAL VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
FOR PULSE LINEARITY MEASUREMENT
Electrode K G1 G2 Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11 Dy12 Dy13 Dy14 P
Ratio
2.5 7.5 0 1.2 1.8 1 1 1 1 1.2 1.5 2 2.8 4 5.7 8
5
Capacitors in µF
0.01 0.01 0.02 0.02 0.02 0.04 0.06
Supply Voltage: 2500 Vdc, K: Cathode, Dy: Dynode, P: Anode, G: Grid
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.