Research on ion trapping devices for all-optical trapping of calcium ions
With the rapid development of ion optical clock technology,the impact of the micro-motion effect caused by the radio frequency field used to trap ions in ion optical clock on its performance is becoming more and more negligible.In order to completely eliminate this effect,an experimental scheme of all-optical trapping ion optical clock was proposed.In view of this experimental scheme,an ion trapping device for all-optical trapping of calcium ions was designed and constructed.The device adopts a blade ion trap design,which can realize high-precision stray electric field compensation with a residual force of only on the order of 10-20 N,and has a clearance aperture of 6 mm,which can well meet the passing requirements of dipole trapping laser in all-optical trapping experiments,and the radio frequency(RF)system based on the improved helical resonator design can achieve stable coupling at a low RF frequency of 9.33(1)MHz,and can realize long-term ion trapping by combining vacuum preparation of up to 10-9 Pa and vacuum chamber with conductive glass window.It provides an experimental basis for all-optical trapping of calcium ions,and is of great significance for the realization of optical trapping ion optical clocks.
ion optical clockall-optical trappingion trapradio frequency(RF)vacuum chamber
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维普
