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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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Cryogenic linear Paul trap for cold highly charged ion experiments.

M Schwarz1, O O Versolato, A Windberger

  • 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany. m.schwarz@mpi-hd.mpg.de

The Review of Scientific Instruments
|September 4, 2012
PubMed
Summary
This summary is machine-generated.

We developed a 4 K linear Paul trap for ultra-high vacuum, enabling over 30-hour storage of highly charged ions. This cryogenic method achieves low H(2) partial pressure for advanced ion trapping experiments.

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Area of Science:

  • Atomic, Molecular, and Optical (AMO) Physics
  • Quantum Information Science
  • Accelerator Physics

Background:

  • Achieving ultra-high vacuum is critical for storing and cooling highly charged ions.
  • Cryogenic methods offer a viable solution for reaching the necessary vacuum levels.
  • Long ion storage times are essential for precision measurements and quantum applications.

Purpose of the Study:

  • To develop and characterize a linear Paul trap operating at cryogenic temperatures (4 K) for long-term storage of highly charged ions.
  • To demonstrate the capability of the trap for external ion injection and laser cooling.
  • To present initial operational results with atomic and molecular ions.

Main Methods:

  • Construction and operation of a linear Paul trap at 4 K.
  • Measurement of ion storage times and estimation of residual gas pressure.
  • Implementation of external ion injection and optical access for laser manipulation.
  • Development of a 313 nm all-solid state laser system for sympathetic cooling.

Main Results:

  • Achieved ion storage times of approximately 30 hours.
  • Estimated an upper bound for H(2) partial pressure at 4 K to be around 10(-15) mbar.
  • Demonstrated successful operation with atomic and molecular ions.
  • Set up a laser system for sympathetic cooling of highly charged ions using Be(+) ions.

Conclusions:

  • The developed 4 K linear Paul trap enables ultra-high vacuum conditions suitable for long-term storage of highly charged ions.
  • The trap design facilitates external injection and optical access, crucial for advanced experiments.
  • The system provides a platform for sympathetic cooling experiments, advancing research in precision measurements and quantum technologies.