GENERAL
FEATURES
Sensitivity in the Vacuum Ultraviolet Region
R7311.............................................................115 to 320nm
R7511.............................................................115 to 195nm
High Quantum Efficiency (at 121.6nm)
R7311...............................................................17.3% (Typ.)
R7511...............................................................26.5% (Typ.)
High Anode Sensitivity
R7311 (at 200nm)................................3.8
×
10
5
A/W (Typ.)
R7511 (at 121.6nm).............................5.2
×
10
4
A/W (Typ.)
Parameter
R7311
115 to 320
Unit
nm
Spectral Response
Wavelength
of Maximum Response
Photocathode Material
Window Material
Minimum Effective Area
Dynode
Direct
Interelectrode
Capacitances
Base
Weight
Suitable Socket for Base (supplied)
nm
—
—
mm
—
—
—
pF
pF
—
g
—
200
Cs-Te
R7511
115 to 195
130
Cs-I
MgF
2
4
×
5
Circular-cage
9
Sb-Cs
Approx. 1.7
Approx. 2.0
11-pin base
7
E678-11H
Structure
Number of Stage
Material
Anode to Dynode No.9
Anode to
All Other Electrodes
PHOTOMULTIPLIER TUBES
R7311, R7511
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.
1998 Hamamatsu Photonics K.K.
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
For Vacuum Ultraviolet Light Detection
Cs-Te (R7311), Cs-I (R7511) Photocathode, MgF
2
Window,
13mm (1/2 Inch) Diameter, 9-stage, Side-on Type
APPLICATIONS
Emission Spectroscopy, etc.
Figure 1: Typical Spectral Response
100
0.1
0.01100
P
Q
WAVELENGTH (nm)
300
10
1
200
CATHODE
RADIANT
SENSITIVITY
QUANTUM
EFFICIENCY
R7311
R7511
TPMSB0087EB
TPMSF0077
PRELIMINARY DATA
JUL. 1998