R4332(2006) データシートの表示（PDF） - Hamamatsu Photonics

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R4332
(Rev.:2006)

PHOTOMULTIPLIER TUBES

Hamamatsu Photonics 

PHOTOMULTIPLIER TUBES R3788, R4332

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter

Value

Unit

Supply Voltage

Between Anode and Cathode

Between Anode and Last Dynode

1250

250

V

V

Average Anode Current A

0.1

mA

CHARACTERISTlCS (at 25 °C)

Parameter

Quantum Efficiency

(at Peak Wavelength)

Luminous B

Cathode Sensitivity Radiant

at 194 nm

at 210 nm

at 420 nm

Red/White Ratio C

Blue Sensitivity Index D

Luminous E

Anode Sensitivity

Radiant

at 194 nm

at 210 nm

at 420 nm

Gain E

Anode Dark Current F (After 30 min Storage in Darkness)

ENI (Equivalent Noise Input) G

Anode Pulse Rise Time H

Time Response E

Electron Transit Time I

Transit Time Spread (TTS) J

Anode Current Stability K

Light Hysteresis

Voltage Hysteresis

Min.

—

100

—

—

—

—

—

500

—

—

—

—

—

—

—

—

—

—

—

R3788

Typ.

30

(at 250 nm)

120

31

50

90

0.01

10

1200

3.1 × 105

5.0 × 105

9.0 × 105

1.0 × 107

5

1.4 × 10-16

2.2

22

1.2

0.1

1.0

Max.

—

—

—

—

—

—

—

—

—

—

—

—

50

—

—

—

—

—

—

Min.

—

100

—

—

—

—

—

500

—

—

—

—

—

—

—

—

—

—

—

R4332

Typ.

40

(at 210 nm)

120

60

68

90

0.01

10

1200

6.0 × 105

6.8 × 105

9.0 × 105

1.0 × 107

5

1.4 × 10-16

2.2

22

1.2

0.1

1.0

Max.

—

—

—

—

—

—

—

—

—

—

—

—

50

—

—

—

—

—

—

Unit

%

µA/lm

mA/W

mA/W

mA/W

—

—

A/lm

A/W

A/W

A/W

—

nA

W

ns

ns

ns

%

%

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 V between the cathode and

all other electrodes connected together as anode.

C: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.

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

Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 P

Distribution

Ratio

1 1111 11111

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

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 refers to

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

output of a photomultiplier tube.

ENI = 2q.ldb.G.∆f

S

where q = Electronic charge (1.60 × 10-19 coulomb).

ldb = Anode dark current(after 30 minutes storage) in amperes.

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.

I: 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 amplitude. In measurement, the whole

photocathode is illuminated.

J: 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.

K: Hysteresis is temporary instability in anode current after light and voltage

are applied.

Hysteresis =

lmax. lmin. × 100 (%)

li

li

l max.

l min.

TIME

0

5

6

7 (minutes)

TPMSB0002EA

(1)Light Hysteresis

The tube is operated at 750 V with an anode current of 1 µA 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 V with an anode current of 0.1 µA for 5 minutes.

The light is then removed from the tube and the supply voltage is quickly

increased to 800 V. 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.

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