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Magnetic Field due to Moving Charges01:23

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A stationary charge creates and interacts with the electric field, while a moving charge creates a magnetic field.
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Related Experiment Video

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Experimental Methods for Trapping Ions Using Microfabricated Surface Ion Traps
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Planar, strong magnetic field source for a chip ion trap.

Jonathan Pinder1, John H Lacy2, Ryan Willetts1

  • 1Department of Physics and Astronomy, University of Sussex, Falmer BN1 9QH, United Kingdom.

The Review of Scientific Instruments
|November 3, 2020
PubMed
Summary

We developed a scalable planar magnetic field source for chip ion traps. This device precisely tunes magnetic fields and their derivatives, achieving 0.5 T homogeneous fields for Penning ion traps.

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Area of Science:

  • Physics
  • Engineering
  • Quantum Technology

Background:

  • Chip ion traps require precise magnetic field control.
  • Existing magnetic field sources may lack scalability or tunability.

Purpose of the Study:

  • To present a novel planar, scalable magnetic field source.
  • To enable tunable magnetic fields and their derivatives for ion trapping applications.

Main Methods:

  • Designed a source with two symmetric sections of coplanar, concentric rectangular current loops.
  • Integrated the source into a cryogenic setup.
  • Calibrated the device and performed experimental investigations.

Main Results:

  • Achieved routinely homogeneous magnetic fields of approximately 0.5 T.
  • Demonstrated the ability to tune field strength and lowest-order derivatives.
  • Investigated configurations for homogeneous fields and magnetic bottles.

Conclusions:

  • The developed magnetic field source is scalable and suitable for chip ion traps.
  • The device offers precise control over magnetic field parameters.
  • Further development aims to achieve fields exceeding 1 T.