C972P datasheet(3/11 Pages) PERKINELMER

Part #	C972P

Description	CHANNEL PHOTO MULTIPLIER

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Manufacturer	PERKINELMER [PerkinElmer Optoelectronics]

Direct Link	http://www.perkinelmer.com

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3 / 11 page

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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

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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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