R331 查看數據表（PDF） - Hamamatsu Photonics

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R331

PHOTOMULTIPLIER TUBES

Hamamatsu Photonics 

PHOTOMULTIPLIER TUBES R331, R331-05

MAXIMUM RATINGS (Absolute Maximum Values)

Parameter

Value Unit

Between Anode and Cathode

Supply Voltage

Between Anode and Last Dynode

2500

Vdc

500

Vdc

Average Anode Current A

0.2

mA

Ambient Temperature

-80 to +50 °C

CHARACTERISTICS (at 25°C)

Parameter

Min.

Luminous B

60

Quantum Efficiency

Cathode

—

at 390nm

Sensitivity

Radiant at 420nm

—

Blue C

9.0

Anode

Luminous D

30

Sensitivity Radiant at 420nm

—

Gain D

—

Anode Dark R331

—

Count E

R331-05

—

Anode Pulse Rise Time F —

Time

Response D

Electron Transit Time G

Transit Time Spread H

—

—

Typ.

90

25

85

10.5

120

1.1 × 105

1.3 × 106

16

18

2.6

48

1.1

Max. Unit

— µA/lm

—

%

— mA/W

— µA/lm-b

— A/lm

— A/W

—

—

— cpm

— cpm

—

ns

—

ns

—

ns

NOTES

A: Averaged over any interval of 30 seconds maximum and

the whole photocathode is illuminated.

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

a distribution temperature of 2856K. The light input is

0.01 lm and 150 volts are applied between the cathode

and all other electrodes connected together as anode.

C: 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.

D: Measured with the same light source as Note B and the

light input is 0.1µlm. The anode-to-cathode supply vol-

tage and voltage distribution ratio are shown in Table 1.

E: Background noise after 30 minute storage in darkness.

F: The rise time is the time for the output pulse to rise from

10% to 90% of the peak amplitude when the entire pho-

tocathode is illuminated by a delta function light pulse of

400nm.

G: The electron transit time is the interval between the

arrival of a delta function light pulse at the input window

of the tube and the time when the output pulse reaches

the peak amplitude. In measurement the entire

photocathode is illuminated.

H: Also called transit time jitter. This is the fluctuation in

electron transit time between individual pulses in the

single photoelectron state, and may be defined as the

FWHM of the frequency distribution of the transit times.

Table 1: Voltage Distribution Ratio

Electrodes

K G Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 Dy11Dy12 P

Distribution Ratio 4 0 1 1.4 1 1 1 1 1 1 1 1 1 1

Supply Voltage: 1500Vdc, K: Cathode, Dy: Dynode, P: Anode, G: Grid

* Shield should be connected to Dy5.

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