Spiral RF carpet for ion mass spectrometry with radioactive isotope beams

Abstract

A new type of Radio-Frequency carpet for ion trapping and transport, which is made of a small number of long electrodes wrapped together as parallel spirals, starting from the central ion extraction aperture, and extending outwards, is introduced as an alternative to the currently used concentric geometry. The main features introduced are the possibility to construct high electrode densities RF carpets which enhances the characteristics of such devices, by improving the collection efficiency, and a simpler design that eliminates the complex electronic layer from the carpet. The feasibility of the proposed novel spiral geometry for RF carpets is investigated using ion optics simulations.