R2949_06 Datasheet, PDF (1/4 Pages) Hamamatsu Corporation – PHOTOMULTIPLIER TUBE

PHOTOMULTIPLIER TUBE
R2949
(Low Dark Counts Type of R928)
Modified R928, 8 mm × 6 mm Photocathode Size
Low Dark Counts, Extended Red Multialkali, High Sensitivity
For Photon Counting Applications
The R2949 is a 28mm (1-1/8 inch) diameter, 9-stage,
side-on type photomultiplier tube having the same ex-
tended red multialkali photocathode 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 pho-
tometries such as general single photon counting appli-
cations and fluorescence life time measurement.
The R2949 is directly interchangeable with the R928.
FEATURES
GLow Dark Counts ....................................... 300 s^-1 (at 25 °C)
GLow Dark Current ......... 2 nA (after 30 min storage in darkness)
GWide Spectral Response ......................... 185 nm to 900 nm
GHigh Cathode Sensitivity
Luminous .......................................................... 200 µA/lm
Radiant at 400 nm .............................................. 68 mA/W
GHigh Anode Sensitivity (at 1000 V)
Luminous .......................................................... 2000 A/lm
Radiant at 400 nm ....................................... 6.8 × 10⁵ A/W
GLow Drift and Hysteresis
SPECIFICATIONS
GENERAL
Parameter
Description/Value
Unit
Spectral Response
185 to 900
nm
Wavelength of Maximum Response
400
nm
Photocathode
MateriaI
Minimum Effective Area
Multialkali
8×6
—
mm
Window Material
UV glass
—
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) —
Figure 1: Typical Spectral Response
TPMSB0155EB
100
10
QUANTUM
EFFICIENCY
CATHODE RADIANT
SENSITIVITY
1
0.1
0.01
100 200 300 400 500 600 700 800 900 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 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.