Ion remeasurement in the RF quadrupole ion trap
- Oak Ridge National Lab., TN (United States)
The development of the mass-selective instability mode of operation for the quadrupole ion trap has provided impetus for mass spectrometric applications of the device. In the technique, the amplitude of the confining rf voltage is increased linearly with time causing trajectories of stored ions to become unstable in the axial direction sequentially from low to high mass/charge. Ejected ions are subsequently detected by an external electron multiplier. Thus, the technique is straightforward but also destructive in nature; any further manipulations of the original ion packet are precluded by ion ejection and subsequent collision with the detector surface. The authors have modified a Teledyne 3DQ quadrupole ion trap mass spectrometer to allow in situ detection and ion remeasurement via image current detection.
- OSTI ID:
- 210695
- Report Number(s):
- CONF-9505261--
- Country of Publication:
- United States
- Language:
- English
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