A levitated magnetic dipole configuration as a compact charged particle trap

As a magnetic confinement configuration for electron–positron pair-plasmas, the APEX collaboration [T. S. Pedersen et al., New J. Phys. 14, 035010 (2012)] plans to construct a compact levitated dipole experiment with a high-temperature superconducting coil. In order to realize stable levitation of t...

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Veröffentlicht in:Review of scientific instruments 2020-04, Vol.91 (4), p.043507-043507
Hauptverfasser: Saitoh, H., Stoneking, M. R., Pedersen, T. Sunn
Format: Artikel
Sprache:eng
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Zusammenfassung:As a magnetic confinement configuration for electron–positron pair-plasmas, the APEX collaboration [T. S. Pedersen et al., New J. Phys. 14, 035010 (2012)] plans to construct a compact levitated dipole experiment with a high-temperature superconducting coil. In order to realize stable levitation of the dipole field coil, a simple feedback-controlled levitation system was constructed with conventional analog circuits. We report the properties of a prototype levitation system using a permanent magnet and compare its behavior to predictions from a stability analysis. We also present a practical review needed for the construction of a compact levitated dipole trap system based on the work of Morikawa et al. [Teion Kogaku, J. Cryo. Soc. Jpn. 39, 209 (2004)]. Numerical orbit analysis suggests improved confinement properties of charged particles in a dipole field trap by replacing the permanent magnet with a levitated superconducting coil magnet. Such a compact dipole field configuration is potentially applicable to the confinement of various charged particles including positrons and electrons.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.5142863