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Penning traps with unitary architecture for storage of highly charged ions



Joseph N. Tan, Samuel M. Brewer, Nicholas D. Guise


Penning traps are made extremely compact by embedding rare-earth permanent magnets in the electrode structure. Axially-oriented NdFeB magnets are used to produce 0.32 T for ion trapping in unitary architectures that functionally couple the electric and magnetic components into an integrated structure that requires as little as 125 cubic cm of space. An experimental apparatus equipped with detectors and ion optics is installed at the NIST electron beam ion trap (EBIT) facility, constrained to fit within 1 meter at the end of a horizontal beam-line available for extracting highly charged ions. We present a two-magnet architecture with radial access to facilitate the use of laser or atomic beams, as well as the collection of light emission by stored ions. Highly charged ions of neon and argon, extracted with initial energies 4000 eV per unit charge, are captured and stored to study the confinement properties of a one-magnet trap and a two-magnet trap. Design considerations and some initial test results are discussed.
Review of Scientific Instruments


37.10.Ty (ion trapping), 07.55.-w (magnetic instrument and components), 07.75.+h (mass spectrometers), 06.30-k (measurements common to several branches of physics and astronomy)


Tan, J. , Brewer, S. and Guise, N. (2012), Penning traps with unitary architecture for storage of highly charged ions, Review of Scientific Instruments, [online],, (Accessed July 19, 2024)


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Created February 15, 2012, Updated July 3, 2023