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Direct measurement of micromotion speed in a linear quadrupole trap

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Lu,  Z. H.
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Wang,  L. J.
Max Planck Fellow Group, Max Planck Institute for the Science of Light, Max Planck Society;

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Citation

Wang, B., Zhang, J. W., Lu, Z. H., & Wang, L. J. (2010). Direct measurement of micromotion speed in a linear quadrupole trap. JOURNAL OF APPLIED PHYSICS, 108(1): 013108. doi:10.1063/1.3457904.


Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-6AE3-6
Abstract
We demonstrate a simple method to directly measure the micromotion speed and amplitude of ions far away from the nodal line of the linear quadrupole trap using the cross-correlation technique. For the ions very close to the trap nodal line, the micromotion speed and amplitude of ions can also be deduced through linear fitting. This work gives us a direct picture to the ions' micromotion modes at different displacements in the linear trap. With this work, an absolute measurement of the second-order Doppler effect in the research of atomic clocks based on large number of ions becomes possible. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3457904]