A modified auxiliary excitation signal for achieving unidirectional ion ejection in quadrupole ion trap mass spectrometers operating in the resonance ejection mode

Kotana, Appala Naidu and Mohanty, Atanu K (2015) A modified auxiliary excitation signal for achieving unidirectional ion ejection in quadrupole ion trap mass spectrometers operating in the resonance ejection mode. In: INTERNATIONAL JOURNAL OF MASS SPECTROMETRY, 386 . pp. 15-23.

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Abstract

This paper proposes a technique to cause unidirectional ion ejection in a quadrupole ion trap mass spectrometer operated in the resonance ejection mode. In this technique a modified auxiliary dipolar excitation signal is applied to the endcap electrodes. This modified signal is a linear combination of two signals. The first signal is the nominal dipolar excitation signal which is applied across the endcap electrodes and the second signal is the second harmonic of the first signal, the amplitude of the second harmonic being larger than that of the fundamental. We have investigated the effect of the following parameters on achieving unidirectional ion ejection: primary signal amplitude, ratio of amplitude of second harmonic to that of primary signal amplitude, different operating points, different scan rates, different mass to charge ratios and different damping constants. In all these simulations unidirectional ejection of destabilized ions has been successfully achieved. (C) 2015 Elsevier B.V. All rights reserved.

Item Type:	Journal Article
Publication:	INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
Publisher:	ELSEVIER SCIENCE BV
Additional Information:	Copy right for this article belongs to the ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Keywords:	Quadrupole ion trap; Resonance ejection; Modified auxiliary dipolar excitation
Department/Centre:	Division of Interdisciplinary Sciences > Supercomputer Education & Research Centre Division of Physical & Mathematical Sciences > Instrumentation Appiled Physics
Date Deposited:	15 Oct 2015 06:38
Last Modified:	15 Oct 2015 06:38
URI:	http://eprints.iisc.ac.in/id/eprint/52559

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