R928_06 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBES

PHOTOMULTIPLIER TUBES
R928, R955
Extended Red, High Sensitivity, Multialkali Photocathode
28 mm (1-1/8 Inch) Diameter, 9-Stage, Side-On Type
The R928 and R955 feature extremely high quantum effi-
ciency, high current amplification, good S/N ratio and
wide spectral response from UV to near infrared. The
R928 employs a UV glass envelope and the R955 has a
fused silica envelope for UV sensitivity extension.
The R928 and R955 are well suited for use in broad-band
spectrophotometers, atomic absorption spectrophotomet-
ers, emission spectrophotometers and other precision
photometric instruments.
FEATURES
GWide Spectral Response
R928 ..................................................... 185 nm to 900 nm
R955 ..................................................... 160 nm to 900 nm
GHigh Cathode Sensitivity
Luminous ......................................................... 250 µA/lm
Radiant at 400 nm ............................................. 74 mA/W
GHigh Anode Sensitivity (at 1000 V)
Luminous ......................................................... 2500 A/lm
Radiant at 400 nm ..................................... 7.4 × 10⁵ A/W
GLow Drift and Hysteresis
SPECIFICATIONS
GENERAL
Parameter
Spectral
R928
Response R955
Description/Value
Unit
185 to 900
nm
160 to 900
nm
Wavelength of Maximum Response
400
nm
Photocathode
MateriaI
Minimum Effective Area
Multialkali
8 × 24
—
mm
Window
R928
UV glass
—
Material
R955
Fused silica
—
Secondary Emitting Surface
Multialkali
—
Dynode
Structure
Circular-cage
—
Number of Stages
9
—
Direct Interelectrode Anode to Last Dynode
4
pF
Capacitances
Anode to All Other Electrodes
6
pF
Base
11-pin base JEDEC No. B11-88 —
Weight
Approx. 45
g
Operating Ambient Temperature
-30 to +50
°C
Storage Temperature
-30 to +50
°C
SuitabIe Socket
E678–11A (Sold Separately) —
SuitabIe Socket Assembly
E717–63 (Sold Separately)
E717–74 (Sold Separately)
—
Figure 1: Typical Spectral Response
TPMSB0001EB
100
R955
CATHODE
RADIANT
SENSITIVITY
R928
10
QUANTUM EFFICIENCY
1
0.1
0.01
100 200 300 400 500 600 700 800 900 1000
WAVELENGTH (nm)
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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. ©2006 Hamamatsu Photonics K.K.