R2078_07 Datasheet, PDF (1/2 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE

PHOTOMULTIPLIER TUBE
R2078
Extremely Improved Solar Blind Photocathode for Aerospace and
General Photometric Applications, 25 mm (1 Inch) Diameter,
Ruggedized Low Profile Tube, Cs-Te Photocathode, 10-Stage, Head-on
FEATURES
GHigh Quantum Efficiency ............................ 14 % at 254 nm Typ.
GRuggedized, Low Profile Structure ............ 300 m/s² vibration
43 mm in bulb length
SPECIFICATIONS
GENERAL
Parameter
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Effective Area
Window Material
Dynode
Structure
Number of Stages
Base (temporary)
Operating Ambient Temperature
Storage Temperature
Suitable Socket
Description / Value
Unit
160 to 320
nm
240
nm
Cs-Te
—
21
mm
Fused silica
—
Circular cage
—
10
—
12-pin base JEDEC No. B12-13
—
-40 to +80
°C
-40 to +80
°C
E678-12A (supplied)
—
MAXIMUM RATINGS (Absolute Maximum Values)
Supply Voltage
Average Anode Current
Parameter
Between Anode and Cathode
Between Anode and Last Dynode
Value
Unit
2000
V
300
V
0.015
mA
CHARACTERISTICS (at 25°C)
Parameter
Min.
Typ.
Max.
Unit
Radiant at 254 nm
20
29
—
mA/W
Cathode Sensitivity
Radiant at 365 nm
Radiant at 550 nm
—
3.4 × 10^-3 1.2 × 10^-2
mA/W
—
3.8 × 10^-5
—
mA/W
Quantum Efficiency at 254 nm
9.8
14.2
—
%
Anode Sensitivity
Radiant at 254 nm
2.0 × 10³
1.5 × 10⁴
—
A/W
Gain
1.0 × 10⁵
5.0 × 10⁵
—
—
Anode Dark Current (after 30 min storage in darkness)
—
15
100
pA
Dark Counts
PHD at 1 × 10⁶ Gain ^A
Plateau at V0 ^B
—
10
20
s^-1
—
20
—
s^-1
Anode Pulse Rise Time ^C
—
1.5
—
ns
NOTE: AThe discrimination level is set at one forth the average electron pulse height to measure the background.
BPlateau voltage (V0) at the test up in HPK.
CThe rise time is the time of the output pulse to rise from 10 % to 90 % of peak amplitude when the entire photocathode is illuminated by a
delta function light pulse.
VOLTAGE DISTRIBUTION RATIO AND SUPPLY VOLTAGE
Electrodes K Dy1 Dy2 Dy3 Dy4 Dy5 Dy6 Dy7 Dy8 Dy9 Dy10 P
Ratio
2
1
1
1
1
1
1
1
1
1
1
Supply Voltage: 1500 V, K: Cathode, Dy: Dynode, P: Anode
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 HAMAMATSU 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. ©2007 Hamamatsu Photonics K.K.