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Published on: January 20, 2022
A tuning method for electrically compensated ion cyclotron resonance mass spectrometer traps
Adam M Brustkern1, Don L Rempel, Michael L Gross
1Department of Chemistry, Washington University in St. Louis, St. Louis, Missouri 63130, USA.
Journal of the American Society for Mass Spectrometry
|January 12, 2010
Summary
We present a new method for tuning ion cyclotron resonance (ICR) traps by monitoring ion cyclotron frequency shifts. This technique significantly improves trap performance by reducing frequency variations caused by oscillation amplitudes.
Area of Science:
- Physics
- Analytical Chemistry
- Instrument Science
Background:
- Ion cyclotron resonance (ICR) traps are crucial for high-precision mass spectrometry.
- Achieving optimal performance requires precise tuning of electric fields to minimize frequency shifts.
Purpose of the Study:
- To introduce a novel method for tuning electrically compensated ICR traps.
- To demonstrate the effectiveness of this tuning method in reducing frequency variations.
Main Methods:
- Tracking ion cyclotron frequency at varying oscillation amplitudes.
- Measuring frequency shifts as a function of cyclotron orbit size and z-mode amplitude.
- Iterative adjustment of trap compensation voltages.
Main Results:
- Initial cyclotron frequency variations of ~12 ppm were observed between low and high z-mode amplitudes.
- Tuning reduced these frequency differences to ~1 ppm within one iteration.
- The method proved effective for a custom-built electrically compensated trap.
Conclusions:
- The described method provides an efficient way to tune electrically compensated ICR traps.
- This tuning approach enhances the precision and reliability of ICR measurements.
- The technique is adaptable to various ICR trap designs incorporating electrical compensation.
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