PHOTOMULTIPLIER TUBE
R943-02
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. 2003 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.
GaAs (Cs) Photocathode, Wide Spectral Response, 51 mm (2") Diameter
Head-on Type for Photon Counting, Low Dark Counts, Excellent P.H.D.
GENERAL
Figure 1: Typical Spectral Response
TPMHB0281EA
200
400
600
800
1000
WAVELENGTH (nm)
C
Q
10-
2
10-
1
10
0
10
1
10
2
QUANTUM
EFFICIENCY
CATHODE
RADIANT
SENSITIVITY
FEATURES
G
Wide Spectral Response ............. 160 nm to 930 nm
G
High Quantum Efficiency in Near IR
... 14 % at 632.8 nm
G
Fast Rise Time ................................. 3.0 ns at 1500 V
G
Excellent Single Photoelectron
Pulse Height Distribution
........................... Peak to Valley Ratio 2.3 (at -20
°
C)
G
Low Dark Counts ..................... 20 s
-1
Typ. (at -20
°
C)
G
Raman Spectroscopy
G
Fluorescent Spectroscopy
G
Astrophysical Measurement
G
Laser Detection
APPLICATIONS
Hamamatsu R943-02 is a 51 mm (2") diameter head-on type photomultiplier tube having GaAs (Cs) photocathode and synthetic
silica window. The combination of the GaAs photocathode and the synthetic silica window allows high sensitivity over a wide spectral
range from UV to IR (160 nm to 930 nm).
The R943-02 is selected for photon counting and features low dark counts and excellent pulse height distribution (PHD) of single
photoelectrons.
Parameter
Description / Value
160 to 930
300 to 850
Unit
nm
nm
Spectral Response
Wavelength of Maximum Response
Photocathode
MateriaI
Minimum Effective Area
Mode
Window Material
Dynode
Secondary Emitting Surface
Structure
Number of Stages
Direct Interelectrode Capacitances
Anode to Last Dynode
Anode to All Other Electrodes
Base
SuitabIe Socket
Weight
Operating Ambient Temperature
A
Storage Temperature
GaAs(Cs)
10
×
10
Opaque
Synthetic silica glass
Cu-BeO
Linear focused
10
Approx. 2.7
Approx. 5.0
21-pin glass base
E678–21C (supplied)
E678–21D (sold separately)
93
-30 to +50
-80 to +50
—
mm
—
—
—
—
—
pF
pF
—
—
g
°
C
°
C