METAL PACKAGE
PHOTOMULTIPLIER TUBE
R7400U SERIES
Compact size (16 mm diameter, 12 mm seated length),
Fast Time response (rise time 0.78 ns)
The R7400U series is a subminiature photomultiplier tube with a
16 mm diameter and 12 mm seated length. A precision engi-
neered 8-stage electron multiplier (composed of metal channel
dynodes) is incorporated in the TO-8 package to produce a noise
free gain of 700,000 times (R7400U). The R7400U series also
features excellent response time with a rise time of 0.78 ns. Vari-
ous types of the R7400U series are available with different spec-
tral response and gain ranges, including those selected specifi-
cally for photon counting applications. Hamamatsu also provides
a hemispherical lens input option to the series (R7401 and
R7402), effectively doubling the active area.
Left: R7400U
Right: R7401/R7402
FEATURES
World's smallest photomultiplier tubes assembled in a TO-8 metal package (1/7th of the Hamamatsu R647).
The necessary components are built into a TO-8 package while retaining full photomultiplier tube performance to cre-
ate a new generation of photosensors.
Photon counting type: R7400P.
The R7400P is specially selected on account of low noise and high gain for use in photon counting applications.
Hemispherical lens window types: R7401 (bialkali), R7402 (multialkali).
The hemispherical lens window doubles the effective input area to 12 mm in diameter.
SERIES
Solar Blind
UV to Visible Range
R7400U/R7400U-03/R7400U-06
R7400P
R7401 (Visible Range)
UV to Near IR Range
R7400U-01/R7400U-02/R7400U-04/R7400U-20
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R7402 (Visible to Near IR Range )
Insulation Cover
Yes
Yes
Yes
Standard
For Photon Counting
With Lens
R7400U-09
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GENERAL
Parameter
Minimum Effective Area
Dynode
Weight
Structure
Number of Stage
R7400U Series/R7400P
R7401/R7402/R7401P
R7400U Series/R7400P
R7401/R7402/R7401P
Description/Value
8
Metal Channel
8
Approx. 5.3
Approx. 6.3
-80 to +50
-30 to +50
g
擄C
Unit
mm
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Ambient Temperature
VOLTAGE DISTRIBUTION RATIO
Electrodes
Ratio
K
1
Dy1
1
Dy2
1
Dy3
1
Dy4
1
Dy5
1
Dy6
1
Dy7
1
Dy8
0.5
P
Supply Voltage: 800 V 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.
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. 漏2001 Hamamatsu Photonics K.K.
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