Performance predictions for a laser intensified thermal beam for use in high resolution Focused Ion Beam instruments

Abstract

Photo-ionization of a laser-cooled and compressed atomic beam from a high-flux thermal source can be used to create a high-brightness ion beam for use in Focus Ion Beam (FIB) instruments. Here we show using calculations and Doppler cooling simulations that an atomic rubidium beam with a brightness of $2.1\times 10^{7}A/(m^{2}sreV)$ at a current of 1 nA can be created using a compact 5 cm long 2D magneto-optical compressor which is more than an order of magnitude better than the current state of the art Liquid Metal Ion Source.

arXiv comment8 pages, 7 figures submitted to: Phys. Rev. A

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