R1250 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE

PHOTOMULTIPLIER TUBE
R1250
For High Energy Physics, Fast Time Response, High Pulse Linearity
127mm (5 Inch) Diameter, Bialkali Photocathode, 14-Stage, Head-on Type
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Useful Diameter
Window
Material
Dynode
Structure
Number of Stages
Base
Suitable Socket
Description/Value
300 to 650
420
Bialkali
120
Borosilicate glass
Linear focused
14
20-pin base
E678-20A (supplied)
Unit
nm
nm
—
mm dia.
—
—
—
—
—
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Value
Unit
Supply Voltage
Between Anode and Cathode
Between Anode and Last Dynode
3000
Vdc
500
Vdc
Average Anode Current
0.2
mA
Ambient Temperature
-30 to +50
°C
CHARACTERISTICS (at 25°C)
Parameter
Luminous (2856K)
Cathode Sensitivity
Blue (with CS 5-58 filter)
Quantum Efficiency at 390nm
Anode Sensitivity
Luminous (2856K)
Blue (with CS 5-58 filter)
Gain
Anode Dark Current (after 30min. storage in darkness)
Anode Pulse Rise Time
Time Response
Electron Transit Time
Transit Time Spread
Pulse Height Resolution with ¹³⁷Cs
Gain Deviation
Long Term
Short Term
Pulse Linearity *
2% Deviation
5% Deviation
* Measured with special voltage distribution ratios shown in the Table 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
µA/lm
µA/lm-b
%
A/lm
A/lm-b
—
nA
ns
ns
ns
%
%
%
%
%
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: 2000Vdc, 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: 2500Vdc, 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 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. _© 1999 Hamamatsu Photonics K.K.