CHARACTERISTICS (at 25

°C)

VOLTAGE DlSTRlBUTlON RATlO AND SUPPLY VOLTAGE

GENERAL

MAXIMUM RATINGS (Absolute Maximum Values)

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SPECIFICATIONS

PHOTOMULTIPLIER TUBE

R8520-406

FEATURES

APPLICATIONS

Parameter

Min.

Unit

Cathode Sensitivity

Anode Sensitivity

Anode Dark Current (After 30 minute storage in darkness)

Time Response

Pulse Linearity (

±2 % Deviation)

Luminous (2856 K)

Blue Sensitivity Index (CS 5-58)

Radiant at 420 nm

Quantum Efficiency at 175 nm

Luminous (2856 K)

Gain (

Anode Pulse Rise Time

Electron Transit Time

Transit Time Spread (FWHM)

80

9.0

—

—

40

—

—

—

—

—

—

100

11.0

100

30

100

1

2

1.8

12.4

0.8

30

mA/lm

—

mA/W

%

A/W

—

nA

ns

ns

ns

mA

—

—

—

—

—

—

20

—

—

—

—

Typ.

Max.

Parameter

Unit

Spectral Response

Wavelength of Maximum Response

Window Material

Photocathode

Dynode

Operating Ambient Temperature

Storage Temperature

Weight

MateriaI

Minimum Effective Area

Structure

Number of Stages

160 to 650

420

Synthetic silica

Bialkali

20.5

× 20.5

Metal channel

10

-110 to +50

-110 to +50

22.9

nm

nm

—

—

—

—

°C

°C

g

Description / Value

Parameter

Unit

Supply Voltage

Average Anode Current

Between Anode and Cathode

Between Anode and Last Dynode

900

150

0.1

V

V

mA

Value

Electrodes

K

Dy1

G

Dy2

Dy3

Dy4

Dy5

Dy6

Dy7

Dy8

P

Ratio

0.5

1.5

2

1

1

1

1

1

1

Dy9

1

Dy10

1

0.5

SuppIy Voltage: 800 V, K: Cathode, G: Grid, Dy: Dynode, P: Anode

GHigh Energy Physics

GAcademic Research

GFor Low Temperature Operation Down to -110 °C

GLow Radioactivity 26 mm (1 Inch) square

GHigh UV Sensitivity by Synthetic Silica Window