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IMS Instrumentation I : Isolated data acquisition for ion mobility spectrometers with grounded ion sources
Authors
Moritz Hitzemann
Ansgar T. Kirk
Martin Lippmann
Stefan Zimmermann
Publication date
1 January 2020
Publisher
Berlin ; Heidelberg : Springer
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Abstract
The drift voltage required for operating ion mobility spectrometers implies high voltage isolation of either the ion source or the detector. Typically, the detector is grounded due to the sensitivity of the small ion currents to interferences and thus higher requirements for signal integrity than the ion source. However, for certain ion sources, such as non-radioactive electron emitters or electrospray ionization sources, or for coupling with other instruments, such as gas or liquid chromatographs, a grounded ion source is beneficial. In this paper, we present an isolated data acquisition interface using a 16 bit, 250 kilosamples per second analog to digital converter and fiber optic transmitters and receivers. All spectra recorded via this new data acquisition interface and with a grounded ion source show the same peak shapes and noise when compared with a grounded detector, allowing additional freedom in design. © 2020, The Author(s)
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Institutionelles Repositorium der Leibniz Universität Hannover
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Last time updated on 24/06/2021