PHOTOMULTlPLlER TUBES
R928, R955
Extended Red, High Sensitivity, Multialkali Photocathode
28mm (1-1/8 Inch) Diameter, 9-Stage, Side-On
FEATURES
Wide Spectral Response
R928 ........................................................ 185 to 900 nm
R955 ........................................................ 160 to 900 nm
High Cathode Sensitivity
Luminous ...................................................... 250 A/lm
Radiant at 400nm ............................................. 74mA/W
High Anode Sensitivity (at 1000V)
Luminous ........................................................ 2500A/lm
Radiant at 400nm ..................................... 7.4 10
5
A/W
Low Drift and Hysteresis
The R928 and R955 feature extremely high quantum efficiency,
high current amplification, good S/N ratio and wide spectral re-
sponse from UV to near infrared. The R928 employs a UV glass
envelope and the R955 has a fused silica envelope for UV sen-
sitivity extension.
The R928 and R955 are well suited for use in broad-band spec-
trophotometers, atomic absorption spectrophotometers, emis-
sion spectrophotometers and other precision photometric in-
struments.
GENERAL
Parameter
Spectral Response
R928
R955
Wavelength of Maximum Response
Photocathode
MateriaI
Minimum Effective Area
Window Material
R928
R955
Dynode
Secondary Emitting Surface
Structure
Number of Stages
Direct Interelectrode Capacitances
Anode to Last Dynode
Anode to All Other Electrodes
Base
Weight
SuitabIe Socket
SuitabIe Socket Assembly
Multialkali
Circular-cage
9
Approx. 4
Approx. 6
11-pin base
JEDEC No. B11-88
Approx. 45
E678–11A (option)
E717–21 (option)
pF
pF
Figure 1:
Typical Spectral Response
Description/Value Unit
100
TPMSB0001EB
185 to 900
160 to 900
400
Multialkali
8 24
UV glass
Fused silica
nm
nm
nm
CATHODE RADIANT SENSITIVITY (mA/W)
QUANTUM EFFICIENCY (%)
10
R955
CATHODE
RADIANT
SENSITIVITY
R928
mm
QUANTUM EFFICIENCY
1
0.1
0.01
100 200
300 400
500 600
700 800
900 1000
g
WAVELENGTH (nm)
Subject to local technical requirements and regulations, availability of products included in this promotional material may vary. Please consult with our sales office.
lnformation furnished by HAMAMATS U is believed to be reliabIe. However, no responsibility is assumed for possibIe inaccuracies or ommissions. Specifications are
subject to change without notice. No patent right are granted to any of the circuits described herein.
©
1997 Hamamatsu Photonics K.K.
HAMAMATSU [ HAMAMATSU CORPORATION ]
