POSITION-SENSITIVE PHOTOMULTIPLIER TUBES R2486 SERIES

Parameter

GENERAL

Spectral Response

Wavelength of Maximum Response

Photocathode Material

Window

Dynode

Anode Number of Wires

Effective Area

300 to 600

420

Bialkali

Borosilicate glass

Plano-plano

3.0

± 0.3

1.5

Coarse mesh

12

16 (X) + 16 (Y)

50

nm

nm

—

—

—

mm

—

—

—

—

mm

Material

Shape

Thickness

Index of Refraction at 420 nm

Structure

Number of Stages

Description/Value

Unit

CHARACTERISTICS (Typ. at 25

°C)

Table 1: Voltage Distribution Ratio and Supply Voltage

Parameter

MAXIMUM RATINGS

Supply Voltage

Between Anode and Cathode

Ambient

Temperature

R2486

R2486-01, -02, -03, -04

1300

0.1

-80 to +50

-30 to +50

V dc

mA

°C

Value

Unit

Averaged over any interval of 30 seconds maxi-

mum.

The light source is a tungsten filament lamp opera-

ted at a distribution temperature of 2856K. Supply

voltage is 150 volts between the cathode and all

other electrodes connected together as an anode.

The value is cathode output current when a blue

filter (Corning CS No. 5-58 polished to 1/2 stock

thickness) is interposed between the light source

and the tube under the same condition as Note

B.

Measured with the same light source as Note

B

and with the anode-to-cathode supply voltage and

voltage distribution ratio shown in Table 1.

Measured with the same supply voltage and vol-

tage distribution ratio as Note

D at 30 minutes af-

ter 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 func-

tion light pulse.

The electron transit time is the interval between

the arrival of a delta function light pulse at the en-

trance window of the tube and the time the output

pulse reaches the peak amplitude. In measure-

ment the entire photocathode is illuminated.

In the case of R2486

NOTES

A:

B:

C:

D:

E:

F:

G:

H:

Supply Voltage: 1250 V dc, K: Cathode, Dy: Dynode, P: Anode

Electrodes

Distribution Ratio

K

Dy1

1

Dy2

1

Dy3

1

Dy4

Dy5

1

Dy6

1

Dy7

11

Dy8

Dy9

Dy10

Dy11

Dy12

P

11

11

1

1

2

Cathode Sensitivity

80

72

9.0

23

40

36

5.0

20

5.5

17

µA/lm

mA/W

—

%

A/lm

A/W

—

nA

ns

ns

Radiant at 420 nm

Blue Sensitivity index

Quantum Efficiency

at 390 nm (peak)

Luminous

Radiant at 420 nm

Parameter

Value

Unit