R331-05 반도체 회로 부품 판매점
PHOTOMULTIPLIER TUBES
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 Hamamatsu Corporation |
PHOTOMULTIPLIER TUBES
R331, R331-05
For Liquid Scintillation Counting
Bialkali Photocathode, 51mm (2 Inch) Diameter, 12 Stages, Head-On Type
The R331 and the R331-05 are 51mm (2 Inch) diameter series pho-
tomultiplier tubes specifically developed for the liquid scintillation count-
ing. They feature low background noise, high tritium efficiency, good
linearity and high gain. The R331 uses a synthetic silica input window
and the R331-05 uses a low K content borosilicate glass input window,
both with a frosted surface and convex-concave shape. They offer min-
imized glass scintillations and high collection efficiency.
FEATURES
Tritium efficiency in tritium window................................ 60% Typ.
Background noise in tritium window...............16cpm Typ. (R331)
18cpm Typ. (R331-05)
Tritium end point (T.E.P.) voltage.................................. 1700V Typ.
Dark pulse summation at T.E.P. voltage.............. 3 × 104cpm Max.
Figure of merit (E2/B).......................................................... 200 Typ.
GENERAL
Parameter
R331
R331-05 Unit
Spectral Response
160 to 650 300 to 650 nm
Wavelength of Maximum Response
420
nm
Photo-
Material
Bialkali
—
cathode Minimum Useful Area 46 mm dia.
Window
Material
Material
Shape
Synthetic silica Low K content
borosilicate
(Frosted) glass (Frosted)
Concave-Convex
—
—
Dynode
Structure
Number of Stages
Linear focused
12
—
—
Direct
Anode to Last Dynode
2
pF
Interelectrode Anode to All Other
2.5 pF
Capacitances Electrodes
Base
21-pin glass base
—
Weight
151 g
Suitable Socket
E678-21A (Supplied)
—
Figure 1: Typical Spectral Response
TPMHB0505EA
100
R331
CATHODE
RADIANT
SENSITIVITY
10
R331-05
QUANTUM
1 EFFICIENCY
0.1
0.01
200 400 600
WAVELENGTH (nm)
800
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. © 1998 Hamamatsu Photonics K.K.
PHOTOMULTIPLIER TUBES R331, R331-05
MAXIMUM RATINGS (Absolute Maximum Values)
Parameter
Value
Between Anode and Cathode
Supply Voltage
Between Anode and Last Dynode
2500
500
Average Anode Current A
0.2
Ambient Temperature
-80 to +50
Unit
Vdc
Vdc
mA
°C
CHARACTERISTICS (at 25°C)
Parameter
Min.
Luminous B
60
Cathode
Sensitivity
Quantum Efficiency
at 390nm
Radiant at 420nm
—
—
Blue C
9.0
Anode
Luminous D
30
Sensitivity Radiant at 420nm
—
Gain D
—
Anode Dark R331
—
Count E
R331-05
—
Anode Pulse Rise Time F
Time
Response D
Electron Transit Time G
Transit Time Spread H
—
—
—
Typ.
90
25
85
10.5
120
1.1 × 105
1.3 × 106
16
18
2.6
48
1.1
Max. Unit
— µA/lm
—%
— mA/W
— µA/lm-b
— A/lm
— A/W
——
— cpm
— cpm
— ns
— ns
— ns
NOTES
A: Averaged over any interval of 30 seconds maximum and
the whole photocathode is illuminated.
B: The light source is a tungsten filament lamp operated at
a distribution temperature of 2856K. The light input is
0.01 lm and 150 volts are applied between the cathode
and all other electrodes connected together as anode.
C: The value is cathode output current when a blue filter
(Corning CS 5-58 polished to 1/2 stock thickness) is
interposed between the light source and the tube under
the same condition as Note B.
D: Measured with the same light source as Note B and the
light input is 0.1µlm. The anode-to-cathode supply vol-
tage and voltage distribution ratio are shown in Table 1.
E: Background noise after 30 minute storage in darkness.
F: The rise time is the time for the output pulse to rise from
10% to 90% of the peak amplitude when the entire pho-
tocathode is illuminated by a delta function light pulse of
400nm.
G: The electron transit time is the interval between the
arrival of a delta function light pulse at the input window
of the tube and the time when the output pulse reaches
the peak amplitude. In measurement the entire
photocathode is illuminated.
H: Also called transit time jitter. This is the fluctuation in
electron transit time between individual pulses in the
single photoelectron state, and may be defined as the
FWHM of the frequency distribution of the transit times.
Table 1: Voltage Distribution Ratio
Electrodes
K G Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11Dy12 P
Distribution Ratio 4 0 1 1.4 1 1 1 1 1 1 1 1 1 1
Supply Voltage: 1500Vdc, K: Cathode, Dy: Dynode, P: Anode, G: Grid
* Shield should be connected to Dy5.
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R331-05 data
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