A novel method for the collimation of ions at atmospheric pressure

Measured gains in source-to-target ion transmission of well over two orders of magnitude are reported from the application of a robust and versatile electrostatic lens that requires no voltage supply and consumes negligible power. When exposed to an ion flux across a potential gradient, a series of...

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Bibliographic Details
Published in:Journal of physics. D, Applied physics Applied physics, 2006-12, Vol.39 (23), p.5008-5015
Main Authors: Kremer, E P, Evans, G J, Jervis, R E
Format: Article
Language:English
Subjects:
Atomic, molecular and charged-particle sources and detectors
Beam optics
Charged-particle beam sources and detectors
Electromagnetism
electron and ion optics
Electrostatic lenses. Septa
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Physics
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Summary:Measured gains in source-to-target ion transmission of well over two orders of magnitude are reported from the application of a robust and versatile electrostatic lens that requires no voltage supply and consumes negligible power. When exposed to an ion flux across a potential gradient, a series of electrically-floating circular conductors automatically attain a profile of convergent potentials. This passive ion lens is used to collimate atmospheric ion source currents that range from 30 pA to 7 nA, increasing the ion signal strength at the target by factors of 20-130 times that of the unaided signal.
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/39/23/017