Ion source modeling and design at PRIME Lab
Nuclear Instruments & Methods in Physics Research Section B-Beam Interactions with Materials and Atoms 223-24,(2004) 155-160;
The design and ion optics of a new high intensity cesium ion source and sample changer being built at PRIME Lab will be discussed. The ion source is based on the Center for Accelerator Mass Spectrometry (CAMS) at Lawrence Livermore National Laboratory design and the sample changer is based on a sample changer developed at Chalk River Nuclear Laboratories in Canada. The ion optics are being modeled using Simion 7.0, which iteratively solves Laplaces' equation. Simion 7.0 does not require cylindrical symmetry so the effects of non-symmetric components, in particular the sample insertion rod and immersion lens can be explored. Other aspects that are being modeled are small shifts in the position of the ionizer as it is heated; shape of the immersion lens; distance from the cathode to the immersion lens; distance from the ionizer to the cathode; the effect of voltage (relative to the, cathode) on the immersion lens; the shape of the cathode; and space charge. (C) 2004 Elsevier B.V. All rights reserved.
ion sources;; charged-particle beam sources;; mass spectrometry;; computer-modeling and simulation
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