R7400U SERIES

METAL PACKAGE

PHOTOMULTIPLIER TUBE

VOLTAGE DISTRIBUTION RATIO

Left: R7400U

Right: R7401/R7402

Electrodes

K

1

Dy1

1

Dy2

1

Dy3

1

Dy4

1

Dy5

1

1

Dy6

Dy7

1

Dy8

0.5

P

Ratio

GENERAL

Unit

Parameter

Minimum Effective Area

Dynode

Weight

Operating Ambient Temperature

and Storage Temperature

Description/Value

8

Metal Channel

8

Approx. 5.3

Approx. 6.3

-80 to +50

-30 to +50

Structure

Number of Stages

Without Lens

With Lens

Without Lens

With Lens

Supply Voltage: 800 V K: Cathode Dy: Dynode P: Anode

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 lens input option to the series (R7401 and R7402), effectively

doubling the active area.

World's smallest photomultiplier tubes assembled. (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.

Specially selected on account of low noise and high gain. For use in photon counting applications.

The lens window type doubles the effective input area to 12 mm in diameter.

Compact size (16 mm diameter, 12 mm seated length),

Fast Time response (rise time 0.78 ns)

mm

—

—

g

g

°C

°C

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. ©2004 Hamamatsu Photonics K.K.

Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.

FEATURES

SPECIFICATIONS

SERIES

Solar Blind

UV to Visible Range

R7400U-03

—

—

R7400U-06

—

—

R7400U-01

—

R7402

R7400U-04

—

—

R7400U

R7400P, R7401P

R7401

Visible to Near IR Range

UV to Near IR Range

Visible Range

R7400U-09

—

—

R7400U-20

—

R7402-20

R7400U-02

—

R7402-02

Standard

For Photon Counting

With Lens