Non-linearity influences on the axial secular-motion spectrum of ions confined in a Fourier transform ion trap mass spectrometer. Experimental studies
✍ Scribed by M. Carette; Y. Zerega
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 153 KB
- Volume
- 41
- Category
- Article
- ISSN
- 1076-5174
- DOI
- 10.1002/jms.947
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
A Fourier transform operating mode is applied to an ion trap. The trap is truncated at 2__r__~0~ and presents unwanted defects that induce confinement electric‐field non‐linearities.
Ion axial secular‐motion spectrum is examined by experiments near the resonance line β~z~ = 0.5. Ion‐loss processes and ion axial‐motion peak splitting are observed.
In the non‐linear ion trap, the ion‐motion frequency depends on its initial conditions in position and velocity. This brings an enlargement of the motion‐frequency peak and limits the resolution.
With a 2__r__~0~ truncated ion trap, the Fourier transform ion trap mass spectrometer (FTIT‐MS) leads experimentally to a mass resolution of about 4000 at 130 u. Copyright © 2005 John Wiley & Sons, Ltd.