Abstract
Results from experimental designs intended for the creation of a laboratory model of a complex for optical spectroscopy of multiply charged thorium ions with a quadrupole Paul ion trap possessing a linear configuration for the development of a nuclear frequency standard are described. Preliminary experimental studies intended for the production of singly, doubly, and triply charged thorium ions from the solid-state compound thorium nitrate (IV) by the method of electron-beam evaporation are also presented. It is shown that, relative to singly charged ions, with the use of this method the fractions of triply and doubly charged thorium ions exceed the analogous values for the method of laser ablation used to produce these ions in laboratories in the United States and Germany. The method of electron-beam evaporation is made the basis of a newly developed complex for optical ultra-high resolution spectroscopy.
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