Design of the Ion Trap and Vacuum System for Yb-171-ion Optical Frequency Standard

摘要

We are developing a frequency standard based on the ultra-narrow electric octupole transition of the ytterbium-ion (Yb-171(+)), which is in the optical wavelength region. In this article, we describe optimized design of our end-cap type Paul trap which will be used for trapping single ions for precision frequency metrology. Selection of the materials for fabricating different parts of the trap assembly is also described. Customized design of the ultra-high vacuum chamber, which houses the ion trap, oven producing ytterbium atomic beam, compensation electrodes and high numerical aperture fluorescence collection lens together with four pairs of optical viewports is lastly described.