C1911 datasheet(2/11 Pages) PERKINELMER

Part #	C1911

Description	Channel Photomultipliers

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Manufacturer	PERKINELMER [PerkinElmer Optoelectronics]

Direct Link	http://www.perkinelmer.com

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Description

PerkinElmer Optoelectronics, for-

merly EG&G Optoelectronics, is

pleased to introduce the Channel

Photomultiplier (CPM), a new ultra

high sensitivity optical detector

which replaces conventional photo-

multipliers (PMTs) and avalanche

photo diodes (APDs). This device

uses a unique detector principle, re-

sulting in a compact design with ul-

tra high gain, high dynamic range,

extremely low dark current, and fast

response.

This high-performance detector offers

fundamental advantages for analytical

instrumentation applications such as

emission spectroscopy, ﬂourescence,

atomic absorption spectroscopy, and

bio and chemo luminescence. The

CPM also delivers important advan-

tages in life science products, indus-

trial and medical equipment, and high-

energy physics.

Principle of Operation

The CPM, like conventional photo-

multiplier tubes, converts a very low

light level into photoelectrons by a

semitransparent photocathode de-

posited on the inner surface of the

entrance window. On their way from

the cathode to the anode the photo-

electrons pass through a narrow, se-

miconductive channel. Each time the

electrons hit the inner wall of the

curved channel, multiple secondary

electrons are emitted. This effect oc-

curs multiple times along the path,

leading to an avalanche effect with a

gain exceeding 108. The curved sha-

pe of the glass tube improves the

multiplication effect.

Features

• Ultra high anode sensitivity

up to 107 A/W

• Extremely low dark current,

typically 3pA @ 106 gain

• Very low equivalent

noise input (down to 10 -17 W)

• Very high stability in dark current

(no ”bursts”)

• High gain exceeding 108

• Very high dynamic range

• Compact dimensions

• Wide spectral response through

multiple window materials

• High resolution

• Fast response time

• High immunity to magnetic ﬁelds

• Rugged design

Cathode Channel-Entrance

Channel-End Anode

Coax

-20…-50 V

black

1 Mohm

Proposal for Power Supply

-HV

100 V

-HV

red

-HV +50…+300 V

blue

Physical Specification

CHANNEL

PHOTOMUL TIPLIER

PRINCIPLE

OF

OPERA TION

When compared to conventional

PMTs, the CPM improves anode

sensitivity by one order of magni-

tude, while lowering dark current by

one to two orders of magnitude. The

noise level shows extreme stability

over time, with no ”bursts.” The

extremely low dark current results in

a higher dynamic range than con-

ventional PMTs and extends detec-

table limits for many applications.

The CPM can be used in analog-DC

mode, single photon counting mode,

and in nuclear spectroscopy (when

coupled to scintillation materials like

BGO, LSO, Nal, etc.). PerkinElmer

Optoelectronics offers a choice of

window materials and photocatho-

des to cover the spectrum from

115 nm (UV range) to 900 nm (NIR).

The new detector is a small, head-on

type with a total diameter of 10.5 mm

including encapsulation. PerkinElmer

Optoelectronics also offers custom

conﬁgurations for speciﬁc applica-

tions.

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