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Bulletin of the American Physical Society

Impact of surface cleaning and ion-electrode distance on trapped ion motional heating

Jonathon A. Sedlacek, Jules Stuart, Colin Bruzewicz, Robert McConnell, Jeremy Sage, John Chiaverini

Published May 30, 2018• 0 citations
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Ion-trap electrode preparation with Ne+^++ bombardment
We describe an ex-situ surface-cleaning procedure that is shown to reduce motional heating from ion-trap electrodes. This precleaning treatment, to be implemented immediately before the final assembly and vacuum processing of ion traps, removes surface contaminants remaining after the electrode-fabrication process. We incorporate a multi-angle ion-bombardment treatment intended to clean the electrode surfaces and interelectrode gaps of microfabricated traps. This procedure helps to minimize redeposition in the gaps between electrodes that can cause electrical shorts. We report heating rates in a stylus-type ion trap prepared in this way that are lower by one order of magnitude compared to a similar untreated stylus-type trap using the same experimental setup.