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Mass Analyzers: Common Types01:19

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Related Experiment Video

Updated: Jul 7, 2026

Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
11:45

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Published on: August 17, 2017

Linear ion trap for second-order Doppler shift reduction in frequency standard applications.

J D Prestage1, G R Janik, G J Dick

  • 1Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1990
PubMed
Summary
This summary is machine-generated.

A new linear ion trap design enhances ion storage capacity by 20x while minimizing Doppler shifts. This advancement offers greater stability and sensitivity for precision measurements in ion trapping experiments.

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Area of Science:

  • Atomic Physics
  • Analytical Chemistry
  • Spectroscopy

Background:

  • Conventional radiofrequency (RF) ion traps suffer from susceptibility to the second-order Doppler effect.
  • Increased ion storage in traps often leads to higher Doppler shifts, limiting precision.
  • Reducing Doppler shifts is crucial for high-precision measurements in ion trapping experiments.

Purpose of the Study:

  • To design and test a novel linear ion trap with enhanced ion storage capacity.
  • To minimize the second-order Doppler effect in RF ion traps.
  • To improve the stability and reduce sensitivity to trapping parameters.

Main Methods:

  • Design of a novel linear ion trap architecture.
  • Experimental testing of the trap with mercury and xenon ions.
  • Inclusion of helium buffer gas for ion trapping.
  • Measurement of ion trap times.

Main Results:

  • The novel linear ion trap stores approximately 20 times more ions than conventional RF traps.
  • The second-order Doppler shift from confining fields is significantly reduced.
  • Sensitivity of the Doppler shift to trapping parameters (RF voltage, frequency, trap size) is greatly decreased.
  • Successful trapping of mercury and xenon ions was achieved.
  • Measured trap times reached up to 2x10^3 seconds.

Conclusions:

  • The developed linear ion trap offers a substantial improvement in ion storage capacity and reduced Doppler effects.
  • This new trap design is highly promising for applications requiring high precision and large ion numbers.
  • The reduced sensitivity to trapping parameters enhances the trap's robustness and reliability.