LTQ Animation

Self-running Demo  (Online Viewing) 

View all stages of MS/MS animation. (Must have Flash player to view)

Self-running Demo (3.69MB executable file)

View all stages of MS/MS animation. Download the executable!    (Does not require Flash player)

Ion Trapping    (1.27MB file)

Ions are either injected into or created within the interior of the ion trap. They are confined by application of appropriate RF and DC voltages with their final position maintained within the center section of the ion trap.  (Does not require Flash player)

Parent Ion Isolation   (1.51MB file)

The RF voltage is adjusted and multi-frequency resonance ejection waveforms are applied to the trap to eliminate all but the desired ion(s) in preparation for subsequent fragmentation and mass analysis. (Does not require Flash player)

Parent Ion Stabilization    (1.19MB file)

The voltages applied to the ion trap are adjusted to stabilize the selected ions and to allow for collisional cooling in preparation for excitation.  (Does not require Flash player)

Parent Ion Excitation       (1.27MB file)

The energy of the selected ions is increased by application of a supplemental resonance excitation voltage applied to all segments of the two rods located on the X-axis. This increase of energy causes dissociation  of the selected ions due to collisions with the damping gas.  The product ions formed are retained in the trapping field.  (Does not require Flash player)

Daughter Ions Ejection          (1.25MB file)

Scanning the contents of the trap to produce a mass spectra is accomplished by linearly increasing the RF voltage applied to all sections of the trap and utilizing a supplemental resonance ejection voltage. These changes sequentially move ions from within the stability diagram to a position where they become unstable in the x-direction and leave the trapping field for detection. (Does not require Flash player)

Daughter Ions Detection   (1.23MB file)

Ions are accelerated into the two high voltage dynodes where ions produce secondary electrons.  This signal is subsequently amplified by two electron multipliers and the analog signals are then integrated together and digitized.  (Does not require Flash player)