Phase synchronization of an ion ensemble by frequency sweep excitation in Fourier transform ion cyclotron resonance.
The Fourier transform ion cyclotron resonance (FT-ICR) signal is produced by the coherent motion of a population of ions. The ability to produce a well-defined ion packet by excitation of an initially random ion ensemble is a major limiting factor of high mass FT-ICR. Ions must be both resonant and in phase with the applied radio frequency excitation field to be accelerated to radii suitable for detection by FT-ICR. Synchronization of the phase angles of an ensemble of ions occurs by off-resonant acceleration during frequency swept excitation. Results from computer-simulated ion trajectories suggest that phase synchronization of the ion packet prior to resonant excitation results in better spatial definition of the ion ensemble.
Hanson
C D
CD
Castro
M E
ME
Russel
D H
DH
D003198:Computer Simulation; D004563:Electrochemistry; D004574:Electromagnetic Fields; D055590:Electromagnetic Phenomena; D007477:Ions; D013058:Mass Spectrometry / Q000379:methods*; D009010:Monte Carlo Method
D007477:Ions