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PDF R2949 Data sheet ( Hoja de datos )
| Número de pieza | R2949 | |
| Descripción | PHOTOMULTIPLIER TUBE | |
| Fabricantes | Hamamatsu Corporation | |
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PHOTOMULTIPLIER TUBE
R2949
(Low Dark Counts Type of R928)
Modified R928, 8 × 6mm Photocathode Area Size
Low Dark Counts, Extended Red Multialkali, High Sensitivity
For Photon Counting Applications
FEATURES
Low Dark Counts ................................................. 300cps (at 25°C)
Low Dark Current ............................................. 2nA (after 30min.)
Wide Spectral Response ........................................ 185 to 900 nm
High Cathode Sensitivity
Luminous ...................................................................... 200µA/lm
Radiant at 400nm ........................................................... 68mA/W
High Anode Sensitivity (at 1000V)
Luminous ...................................................................... 2000A/lm
Radiant at 400nm .................................................... 6.8 × 105A/W
Low Drift and Hysteresis
The R2949 is a 28mm (1-1/8 inch) diameter, 9-stage, side-on type pho-
tomultiplier tube having the same extended red multialkali photo-
cathode as the R928. The R2949 features very low dark counts,
extremely high quantum efficiency, high gain, good S/N ratio and wide
spectral response from UV to near infrared.
The R2949 is well suited for use in various low-level photometries such
as general single photon counting applications and fluorescence life
time measurement.
The R2949 is directly interchangeable with the R928.
GENERAL
Parameter
Description/Value Unit
Spectral Response
185 to 900 nm
Wavelength of Maximum Response
400 nm
Material
Photocathode
Minimum Useful Size
Multialkali
8×6
—
mm
Window Material
UV glass
—
Secondary Emitting Surface Multialkali
—
Dynode
Structure
Circular-cage —
Number of Stages
9—
Direct
Anode to Last Dynode
Interelectrode
Capacitances Anode to All Other Electrodes
Approx. 4
Approx. 6
pF
pF
Base
11-pin base
—
JEDEC No. B11-88
Weight
Approx. 45
g
Suitable Socket (Option)
E678-11A
—
Suitable Socket Assembly (Option)
E717-21
—
Figure 1: Typical Spectral Response
TPMSB0155EA
100
CATHODE
RADIANT
SENSITIVITY
10
QUANTUM
EFFICIENCY
1
0.1
0.01
200 400 600 800 1000
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.
Information furnished by HAMAMATS U 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.
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| PDF Descargar | [ Datasheet R2949.PDF ] | |
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