2020
DOI: 10.1088/0256-307x/37/9/093701
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Significantly Improving the Escape Time of a Single 40Ca+ Ion in a Linear Paul Trap by Fast Switching of the Endcap Voltage

Abstract: Sympathetic cooling is a method used to lower the kinetic energy of ions with complicated energy-level structures, via Coulomb interactions with laser-cooled ions in an ion trap. The ion to be sympathetically cooled is sometimes prepared outside of the trap, and it is critical to introduce this ion into the trap by temporarily lowering the potential of one endcap without allowing the coolant ion to escape. We study the time required for a laser-cooled ion to escape from a linear Paul trap when the voltage of o… Show more

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Cited by 4 publications
(3 citation statements)
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“…Dehmelt proposed the idea of using trapped ions as the references of optical frequency standards in 1973, and laser cooling technologies speed up its developments. [49,50] Up to now, several kinds of ion optical clocks have been realized, which are 40 Ca + ion clock, [13,133,[135][136][137][138][139] 88 Sr + ion clock, [140,141] 199 Hg + ion clock, [142] 171 Yb + ion clock, [143,144] and Al + ion clock. [56,[145][146][147] For Sr + (Ca + , Hg + , and Yb + ) ion clocks, only one ion is trapped.…”
Section: Ion Trapping and Coolingmentioning
confidence: 99%
“…Dehmelt proposed the idea of using trapped ions as the references of optical frequency standards in 1973, and laser cooling technologies speed up its developments. [49,50] Up to now, several kinds of ion optical clocks have been realized, which are 40 Ca + ion clock, [13,133,[135][136][137][138][139] 88 Sr + ion clock, [140,141] 199 Hg + ion clock, [142] 171 Yb + ion clock, [143,144] and Al + ion clock. [56,[145][146][147] For Sr + (Ca + , Hg + , and Yb + ) ion clocks, only one ion is trapped.…”
Section: Ion Trapping and Coolingmentioning
confidence: 99%
“…From the simulation model, we can calculate the dipole trap force is on the order of 10 −18 -10 −17 N, which is a level larger than the residual force that is the prerequisite for the all-optical trapping of a single 40 Ca + . The segmented structure is beneficial to precisely control the position of a single ion or even a string of ions, [20][21][22][23] and the comparatively short length and wide pole distance are essential to align the dipole beam with the trap center for the Gaussian shape of the highpower laser, which is also helpful for increasing the numerical aperture of the imaging system. The whole trap is enclosed in a vacuum chamber with a background gas pressure of ∼ 5 × 10 −9 Pa.…”
Section: Ion Trap Systemmentioning
confidence: 99%
“…Cold and ultracold atomic quantum gases play important roles and have broad application prospects in modern physics. Researches related to cold atomic systems include Bose-Einstein condensate, [1][2][3][4] superfluid, [5][6][7] atomic clocks, [8][9][10] topology, [11] etc. Compared to cold and ultracold atoms, molecules have some unique and superior properties.…”
Section: Introductionmentioning
confidence: 99%