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C1944P Datasheet(PDF) 3 Page - PerkinElmer Optoelectronics

Part # C1944P
Description  Channel Photomultipliers
Download  11 Pages
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Manufacturer  PERKINELMER [PerkinElmer Optoelectronics]
Direct Link  http://www.perkinelmer.com
Logo PERKINELMER - PerkinElmer Optoelectronics

C1944P Datasheet(HTML) 3 Page - PerkinElmer Optoelectronics

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1000
1500
2000
2500
3000
1 E+09
1 E+08
1 E+07
1 E+06
1 E+05
1 E+04
1 E+03
1 E+02
Bias Voltage (V)
Fig. 1: Typical current amplification
1000
1500
2000
2500
3000
1 E-05
1 E-06
1 E-07
1 E-08
1 E-09
1 E-10
1 E-11
1 E-12
Bias Voltage (V)
Fig. 2: Typical anode dark current
C 911
C 922
C 942
C 952
C 962
C 972
MAIN
FEA TURES
Compact Size
The CPM is one of the smallest head-
on type detectors, with a 10.5 mm
diameter including encapsulation. The
photocathode has a useful diameter
of more than 5 mm. The tube is smal-
ler, easier to use, and more rugged
than discrete dynode types. Only a
single high voltage supply of up to
3000 volts is necessary; no external
voltage divider network is required.
A variety of different sizes will be avai-
lable soon (1/2” and 3/4”).
Ultra high anode sensitivity
At the maximum bias voltage of 3000 V,
gains can exceed 108. At 2400 V, an-
ode sensitivity is typically 3 x 106 A/W
at a wavelength of 410 nm with a bi-
alkali photocathode. This performan-
ce surpasses conventional PMTs by
one to two orders of magnitude and
beats APDs by approximately five or-
ders of magnitude (Fig. 1).
Extremely low dark current
The electron multiplication in the
channel is virtually silent, so dark cur-
rent depends only on the photoca-
thode material, leakage currents are
negligible. Bialkali photocathodes ex-
hibit typical dark count rates of 10
cps at a gain of 3 x 108, while UV ca-
thodes have dark count rates below 1
cps. In analog DC mode, the typical
dark noise for a bialkali photocathode
is 20 pA at a gain of 107. In general,
the noise level of the PerkinElmer
Optoelectronics CPM is one to two
orders of magnitude lower than dyn-
ode PMTs, resulting in a significant-
ly higher dynamic range (Fig.2).
Unpotted 1/3 inch Channel Photomultiplier


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