Spiraltron Family0 pages

Spiraltron™ Electron Multipliers
Spiraltron™ Series of
Electron Multipliers
for High Pressure Applications
Applications
Elevated pressures
Portable mass spectrometers
Residual gas analyzers
Vacuum loadlocks
Small ID vacuum systems
Array detections, such as magnetic
sector mass spectrometers

Features
Longer life
Higher dynamic range
Reduced ion feedback
High performance at elevated pressures
Gains in excess of 100,000,000
Noise less than 1 count/sec
Excellent single ion sensitivity
Small, compact linear configuration

PHOTONIS USA Spiraltron™ series of miniaturized channel electron multipliers can deliver high
performance at pressures up to 10-2 torr. The internal spiral structure facilitates low noise performance
by significantly reducing the ion feedback typically generated from the high concentration of residual gas
molecules in high pressure environments.

Multichannel Construction
A Spiraltron™ detector is a Channeltron® electron multiplier consisting of six individual channels fed
from a common collector cone. This multi-channel configuration provides a six-fold increase in surface
area compared to single channel electron multipliers, leading to longer life. The spiral section of the
detector consists of six single channels which are twisted – barber pole fashion – around a solid center.
This geometry results in effectively six times the output surface area and, in addition, allows a straight
channel geometry since the curvature preventing ion feedback is accomplished internally. This
dramatically increases detector life and dynamic range.

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 prior written consent of PHOTONIS.

05/10/2010