PHOTOMULTIPLIER TUBE R7154

Supply Voltage

Between Anode and Cathode

Vdc

Between Anode and Last Dynode

Vdc

mA

Ambient Temperature

°C

MAXIMUM RATINGS (Absolute Maximum Values)

1250

250

0.1

-80 to +50

Parameter

Rating

Unit

CHARACTERISTICS (at 25

°C)

Cathode sensitivity

Quantum Efficiency at 254 nm

Radiant at 254nm

Parameter

Max.

Typ.

Min.

Unit

—

—

30

62

—

—

%

mA/W

Anode Sensitivity

Radiant at 254nm

1.0

—

A/W

—

—

—

2.2

22

1.2

—

—

—

Light Hysteresis

Voltage Hysteresis

—

—

0.1

1.0

—

—

Gain

—

1.0

—

W

—

9.1

—

—

ns

ns

ns

%

%

—

110

nA

NOTES

A: Averaged over any interval of 30 seconds maximum.

B: The light source is a tungsten filament lamp operated at a distribution

temperature of 2856K. Supply voltage is 100 volts between the cath-

ode and all other electrodes connected together as anode.

C: Red/White ratio is the quotient of the cathode current measured us-

ing 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.

D: The value is cathode output current when a blue filter(Corning 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.

E: Measured with the same light source as Note B and with the voltage

distribution ratio shown in Table 1 below.

Table 1: Voltage Distribution Ratio

F: Measured with the same supply voltage and voltage distribution ratio

as Note E after removal of light.

G: ENI is an indication of the photon-limited signal-to-noise ratio. It re-

fers to the amount of light in watts to produce a signal-to-noise ratio

of unity in the output of a photomultiplier tube.

ENI =

where

q = Electronic charge (1.60

ldb = Anode dark current(after 30 minutes storage) in am-

peres.

G = Gain.

∆f = Bandwidth of the system in hertz. 1 hertz is used.

S = Anode radiant sensitivity in amperes per watt at the

wavelength of peak response.

H: 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.

2q·ldb·G·

∆f

S

Electrode

Distribution

Ratio

K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 P

111111111

1

Supply Voltage=1000Vdc

K:Cathode

Dy:Dynode

P:Anode