GENERAL

Parameter

Description/Value

Unit

Spectral Response

Wavelength of Maximum Response

185 to 900

nm

nm

Photocathode

MateriaI

450

Structure

4pF

Anode to Last Dynode

6pF

Anode to All Other Electrodes

Minimum Effective Area

Multialkali

mm

Window Material

Weight

8

24

g

Approx. 45

Dynode

Direct Interelectrode Capacitances

Base

Supply Voltage

Between Anode and Cathode

Between Anode and Last Dynode

1250

250

0.1

Vdc

Vdc

mA

Ambient Temperature

UV glass

Circular-cage

Number of Stages

JEDEC No. B11-88

CHARACTERISTlCS (at 25

)

NOTES

Cathode Sensitivity

(after 30min. storage in the darkness)

A:

B:

C:

D:

E:

Averaged over any interval of 30 seconds

maximum.

The light source is a tungsten filament lamp

operated at a distribution temperature of 2856K.

Supply voltage is 100 volts between the cathode

and all other electrodes connected together as

anode.

The value is cathode output current when a blue

filter(Coming 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.

Red/White ratio is the quotient of the cathode

current measured using a red filter(Toshiba R-68)

interposed between the light source and the tube

by the cathode current measured with the filter

removed under the same conditions as Note B.

Measured with the same light source as Note B

and with the voltage distribution ratio shown in

Table 1 below.

Current Hysteresis

Voltage Hysteresis

Radiant at 254nm

0.4

15

450nm

633nm

852nm

90

73

5.0

450nm

633nm

852nm

24.8

14.3

0.73

Time Response

Electrodes

K

Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9

P

Ratio

1

111

1

1

1111

SuppIy Voltage : 1000Vdc, K : Cathode, Dy : Dynode, P : Anode

Quantum Efficiency at 254nm

29.3

9.5

SuitabIe Socket

E678–11A (option)

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter

Value

Unit

PHOTOMULTlPLlER TUBE R3896

475

60

525

Table 1:Voltage Distribution Ratio

–80 to +50

Parameter

Typ.

Min.

Max.

Unit

Anode Sensitivity

2.2

1.2

0.1

1.0

22

%

%

mA/W

A/lm-b

mA/W

mA/W

mA/W

ns

ns

ns

A/lm

%

%

%

%

nA

3000

5000

50

10

A/lm

F:

G:

H:

I:

J:

Measured with the same supply voltage and

voltage distribution ratio as Note E after removal of

light.

The rise time is the time for the output pulse to

rise from 10% to 90% of the peak amplitude when

the entire photocathode is illuminated by a delta

function light pulse.

The electron transit time is the interval between

the arrival of delta function light pulse at the

entrance window of the tube and the time when

the anode output reaches the peak amplitube. In

measurement, the whole photocathode is

illuminated.

Also called transit time jitter. This is the fluctuation

in electron transit time between individual pulses in

the signal photoelectron mode, and may be defined

as the FWHM of the frequency distribution of

electron transit times

Hysteresis is temporary instability in anode current

after light and voltage are applied.

(1)Current Hysteresis

The tube is operated at 750 volts with an anode

current of 1 microampere for 5 minutes. The light is

then removed from the tube for a minute. The tube is

then re-illuminated by the previous light level for a

minute to measure the variation.

(2)Voltage Hysteresis

The tube is operated at 300 volts with an anode

current of 0.1 micro-ampere for 5 minutes. The light

is then removed from the tube and the supply voltage

is quickly increased to 800 volts. After a minute, the

supply voltage is then reduced to the previous value

and the tube is re-illuminated for a minute to

measure the variation.

Hysteresis =

100(%)

lmax.

li

lmin.

TPMSB0002EA

TIME

max.

l

min.

l

i

l

0

5

6

7 (minutes)

9