The theory of the computer calculation of the stability of ion motion in periodic quadrupole
fields is considered. A matrix approach for the numerical solution of the Hill equation and …

The gas-phase fluorescence excitation, emission and photodissociation characteristics of
three xanthene dyes (rhodamine 575, rhodamine 590, and rhodamine 6G) have been …

The concept of phase stability in a Stark decelerator ensures that polar molecules can be
accelerated, guided, or decelerated without loss; molecules within a certain position and …

We have detected excess micromotion of trapped ions by modulating the trap** voltage.
This radio-frequency (rf) modulation induces parametric resonance and excites secular …

For conventional ion traps, the trap** potential is close to independent of the electronic
state, providing confinement for ions dependent primarily on their charge-to-mass ratio Q/m …

Greatly improved peak shapes are obtained by applying auxiliary quadrupolar excitation to
the first stability region of a resolving quadrupole mass filter. This phenomenon is …

We consider the stability of systems subjected to periodic parametric driving in the context of
ions confined by oscillating electric fields. The behavior of these systems can be understood …

We describe the operation of an electrodynamic ion trap in which the electric quadrupole
field oscillates at two frequencies. This mode of operation allows simultaneous tight …

A new ion sampling interface for an electrospray ionization 3D ion trap mass spectrometer
system is described. The interface uses linear rf quadrupoles as ion guides and ion traps to …

Collisional cooling radio frequency (RF) multipoles are widely used in mass spectrometry,
as ion guides and two-dimensional ion traps. Understanding the behavior of ions in these …