CHANNELTRON® Electron Multipliers

Channeltron® Electron Multipiers are durable andefficient detectors of positive and negative ions aswell as electrons and photons. PHOTONIS offers
over 150 standard and custom CEM designs.
Typical Channeltron applications include mass
spectrometry, RGA, plasma analysis, Auger, electron
spectrometers, SEM, FIB, and leak detectors.
With their low mass and high gain, electron multipliers
are also used in many nuclear physics labs and forspace applications to count electrons and charged
particles in pulse mode operation.

PHOTONIS offers the widest selection of standard and custom Electron Multipliers.
Superior sensitivity and unsurpassed dynamic range
Advanced Channeltron® detectors provide the highest sensitivity through superior signal collection and noise
reduction. They also offer the highest dynamic range to assure a linear response beyond the limits of mostanalytic instruments.
Developments in Channeltron channel electron multiplier (CEM) technology have extended the dynamic range(exclusive EDR option), enhanced lifetime under the environments typically encountered in mass spectrometers,
and improved detection efficiency at higher masses.
Improvements in conversion dynode technology have resulted in structures capable of operation at higher
voltages and materials with improved ion-to-electron conversion yields for better sensitivity at higher masses.
Channel electron multipliers directly detect and amplify energetic photons and charged particles such as positive
and negative ions, electrons and assorted molecular and subatomic particles.
Channel Electron Multiplier Operation
Electroding
Secondary electrons

Secondary emissive layer

Incident ions or photons

Output electrons

Channel wall

Easy replacement and long life
Our Customer Service and Applications specialists can help you identify a replacement detector for yourmass spectrometer, even if the system is no longer manufactured. The Detector cross reference lists standard
replacement CEM’s for over 150 OEM models. We can also easily translate a Galileo, Burle or competitive partnumber to a current PHOTONIS model.
Replacement MAGNUM® cartridges can be installed quickly with the minimum of instrument down time.
Installation can be performed by an operator, eliminating the need for an expensive factory service call. Eachcartridge is designed to be an exact replacement for the original, and will fit into the existing ion optics frame.
Channeltron electron multipliers are designed and manufactured to the highest standards. The patented
detector design provides sustained output longer than other detectors, making Channeltron detectors the mosteconomical detectors available.

CHANNELTRON® Electron Multipliers

Widest range of performance and configurations
PHOTONIS is the world’s largest supplier of standard, retrofit and customer detectors for mass spectrometry
and other applications. Single channel, multi-channel and miniature Channeltron designs can be customized toenhance detection efficiency or for ease of integration.
• Cones: optional cone size, shape and angle ensure the cone is large enough to encompass all events.
• Grids: high transmission grids (85-90%) ensure secondary electrons are forced down the cone.
• Coatings: coating options, such as Csl, MgF2, MgO, KBr, Au and Cu, improve detection efficiency of specificwavelength photons, high or low mass ions or X-rays.
• Collectors: collector options include caps and anodes.
• Leads: leads and feed-through options facilitate integration.

4822B

4765GM

Agilent Ion Optics MAGNUM

Spiraltron™ and MegaSpiraltron™ for high pressure
The unique Spiraltron CEM’s are designed for high pressure applications, such as
portable mass spectrometers. The six-channel structure provides long life and allows
operation at elevated pressures. The internal spiral significantly reduces ion feedback
from residual gas molecules. The new MegaSpiraltron design is a small and robust
ion detector that can achieve high gain while maintaining low noise.

MAGNUM® detector cartridges
MAGNUM electron multipliers offer exceptional performance for optimum mass
resolution, dynamic range and detection sensitivity. MAGNUM detectors are based on
Spiraltron technology, using six spiral multiplier channels fed by a single integral ion
collection aperture. Distributing the secondary electron generation over six separate
channels increases linear output current and promotes longer detector life.

Over 150 standard and custom designs
Mounted Channeltron assemblies provide
optimum performance and lowest cost-ofownership. A variety of leads, feed-throughs
and mounting options allows easy integration
into your process.

For more information, please visit www.photonis.com
PHOTONIS USA Inc.
Visit address
Strubridge Business Park
660 Main street
Sturbridge, MA 01566
United States of America
Mail address
P.O. Box 1159
Sturbridge, MA 01566
United States of America
T +1 800 648 1800 (US & Can)T +1 508 347 4000 (Intl calls)
F +1 508 347 3849

The information furnished is believed to be accurate and reliable, but is not guaranteed and is subject to change without notice. No liability is assumed by PHOTONIS for its use. Performance data
represents typical characteristics as individual product performance may vary. Customers should verify that they have the most current PHOTONIS product information before placing orders. No claims
or warranties are made as to the application of PHOTONIS products. Pictures may not be considered as contractually binding. This document may not be reproduced, in whole or in part, without the priorwritten consent of PHOTONIS.

EP108/Dec09

Email: sales@usa.photonis.com