Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Regular Articles
A Linear Paul Trap without the use of the Transverse Quadrupole Field
Kunihiro KOJIMAMasato GOTOHiroyuki HIGAKIKiyokazu ITOHiromi OKAMOTO
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2022 Volume 17 Pages 1406003

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Abstract

A detailed experimental study has been conducted to demonstrate the efficient confinement of ions in the popular four-rod configuration of a linear Paul trap without exciting the transverse radio-frequency (rf) quadrupole field. The three-dimensional (3D) ion confinement is achieved with an identical rf voltage applied to the end electrodes. The optimum operating region is visualized in the stability tune diagram, which indicates that a large number of ions can be stored by adjusting a few fundamental parameters. The lifetime of an ion cloud in the present linear trap is over a second (corresponding to a million rf cycles), long enough for various practical applications. It is also shown through 3D numerical simulations that one can easily extract ions from the trap at a low loss rate below 10%.

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© 2022 by The Japan Society of Plasma Science and Nuclear Fusion Research
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