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R821 Datasheet

  • R821

  • PHOTOMULTIPLIER TUBE

  • 2頁(yè)

  • HAMAMATSU

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PHOTOMULTIPLIER TUBE
R821
For Astro-physics and Other Ultraviolet Radiation Detection
Solar Blind Response (160nm to 320nm), Cs-Te Photocathode
19mm (3/4 Inch) Diameter, 10-stage, Head-On
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Material
Photocathode
Minimum Effective Area
Window Material
Structure
Dynode
Number of Stages
Base
Suitable Socket
Description/Value
160 to 320
240
Cs-Te
15
Fused silica
Linear focused
10
12-pin glass base
E678-12L (supplied)
Unit
nm
nm
鈥?/div>
mm dia.
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
MAXIMUM RATINGS (Absolute Maximum Values)
Supply Voltage
Average Anode Current
Ambient Temperature
Parameter
Between Anode and Cathode
Between Anode and Last Dynode
Value
1250
250
0.01
-80 to +50
Unit
Vdc
Vdc
mA
擄C
CHARACTERISTICS (at 25擄C)
Min.
Typ.
Cathode Sensitivity
28
鈥?/div>
3
Anode Sensitivity
1.0
脳
10
4
4
脳
10
Gain
鈥?/div>
3.6
脳
10
5
Anode Dark Current (after 30min. storage in darkness)
0.3
鈥?/div>
2.5
鈥?/div>
Anode Pulse Rise Time
Time Response
27
鈥?/div>
Electron Transit Time
NOTE:
Anode characteristics are measured with the voltage distribution ratio shown below.
Parameter
Radiant at 254nm
Radiant at 254nm
Max.
鈥?/div>
鈥?/div>
鈥?/div>
0.5
鈥?/div>
鈥?/div>
Unit
mA/W
A/W
鈥?/div>
nA
ns
ns
VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
Electrodes
K
Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10
Ratio
1.5
1
1
1
1
1
1
1
1
1
1
Supply Voltage: 1000Vdc, K: Cathode, Dy: Dynode, P: Anode
P
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
Information furnished by HAMAMATS U is believed to be reliable. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications are
subject to change without notice. No patent rights are granted to any of the circuits described herein.
漏
1998 Hamamatsu Photonics K.K.

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