Radiant at 400nm .................................................... 6.8
脳
10
5
A/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
Spectral Response
Wavelength of Maximum Response
Photocathode
Material
Minimum Useful Size
Secondary Emitting Surface
Dynode
Direct
Interelectrode
Capacitances
Figure 1: Typical Spectral Response
Description/Value Unit
185 to 900
400
Multialkali
8
脳
6
UV glass
Multialkali
Circular-cage
9
Approx. 4
Approx. 6
11-pin base
JEDEC No. B11-88
Approx. 45
E678-11A
E717-21
nm
nm
鈥?/div>
mm
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
pF
pF
鈥?/div>
g
鈥?/div>
鈥?/div>
0.01
200
400
600
800
1000
100
TPMSB0155EA
CATHODE
RADIANT
SENSITIVITY
CATHODE RADIANT SENSITIVITY (mA/W)
QUANTUM EFFICIENCY (%)
10
QUANTUM
EFFICIENCY
Window Material
Structure
Number of Stages
Anode to Last Dynode
Anode to All Other Electrodes
1
Base
Weight
Suitable Socket (Option)
Suitable Socket Assembly (Option)
0.1
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.
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