An Ion Guide for the Production of a Low Energy Ion Beam of Daughter Products of $α$-Emitters

Details An Ion Guide for the Production of a Low Energy Ion Beam of Daughter Products of $α$-Emitters An Ion Guide for the Production of a Low Energy Ion Beam of Daughter Products of $α$-Emitters

2006-05-22

arxiv.org/abs/nucl-ex/0605027v1

Physics

Nuclear Physics

Nuclear Experiment

13 pages, 11 figures, 4 tables. Submitted to Nucl. Instr. Meth. B

Scientific paper

10.1016/j.nimb.2006.08.015

A new ion guide has been modeled and tested for the production of a low energy ($\approx$ 40 kV) ion beam of daughter products of alpha-emitting isotopes. The guide is designed to evacuate daughter recoils originating from the $\alpha$-decay of a $^{233}$U source. The source is electroplated onto stainless steel strips and mounted along the inner walls of an ion guide chamber. A combination of electric fields and helium gas flow transport the ions through an exit hole for injection into a mass separator. Ion guide efficiencies for the extraction of $^{229}$Th$^{+}$ (0.06%), $^{221}$Fr$^{+}$ (6%), and $^{217}$At$^{+}$ (6%) beams have been measured. A detailed study of the electric field and gas flow influence on the ion guide efficiency is described for two differing electric field configurations.

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