A versatile electrostatic trap with open optical access

Li, Shengqiang; Yin, Jianping

doi:10.1007/s11467-017-0727-1

Cited by 4 publications

(1 citation statement)

References 46 publications

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“…We first operate our AC trap in the conventional switching mode in section 3.1. To further efficiently trap the molecules, we attempt to optimize the switching mode in section 3. energy barrier to further slow the molecules [29][30][31]. After the molecules reach the center, they have already been decelerated to near a standstill.…”

Section: The Monte Carlo Simulationsmentioning

confidence: 99%

AC magnetic trap for cold paramagnetic molecules

Li,

Lin,

Zhang

et al. 2023

Commun. Theor. Phys.

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Strong-field-seeking states are the lowest-energy configurations for paramagnetic molecules in the magnetic field. Molecules in strong-field-seeking states cannot be trapped in a magnetostatic field because a magnetostatic maximum in free space is not allowed. In this paper, we propose an AC magnetic trap composed of two pairs of Helmholtz coils. The spatial magnetic field distribution is numerically calculated and the time-sequential control is depicted. We investigate the influence of the switching frequency and the electric current in the coils on the performance of our trap. Variations of the location and phase-space distribution during a whole switching cycle are simulated. Finally, we study the impact of time during which the field is switched off on the number of captured molecules in a switching cycle.

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Section: The Monte Carlo Simulationsmentioning

confidence: 99%

AC magnetic trap for cold paramagnetic molecules

Li,

Lin,

Zhang

et al. 2023

Commun. Theor. Phys.

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Electrostatic beam splitter for polar molecules

2018

Int. J. Mod. Phys. B

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An electrostatic beam splitter composed of three charged poles for polar molecules in weak-field-seeking states is proposed. First, the schematic diagram is given. Then we calculate the spatial distribution of the electrical field using the finite element software. We simulate the dynamic process of the loading and splitting polar molecules using the classical Monte Carlo method. We investigate the influences of the longitudinal velocity of the incident molecular beam and the voltages on the performance of our beam splitter. In order to alter the splitting ratio of the molecular beam conveniently, we cut off the two output arms of beam splitter at a certain position. Then we study the influences of the voltages and cutting positions on the splitting ratio. At last, we discuss two methods of keeping the height of guiding center nearly unchanged.

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Electrostatic lattice preventing the nonadiabatic transition for cold polar molecules based on a molecular chip

Zhang

2023

Int. J. Mod. Phys. B

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An electrostatic lattice is composed of many micro-scale traps. It is a powerful tool for manipulating cold polar molecules on a chip with the help of the interaction between the dipole moment and the inhomogeneous electric field. To the best of our knowledge, the existing electrostatic lattice still suffers the nonadiabatic transition that will lead to the escape of molecules from the electrostatic trap. In the paper, we skillfully design the electrode structure to avoid the zero-field zone at the center of every single microtrap, and the nonadiabatic transitions can be prevented. First, we numerically calculate the distribution of the spatial electrostatic field. Then, the influences of voltages on the electric field intensity and the height of the trap center are investigated. We simulate of the trajectory of molecules using the Monte Carlo method and figure out the factors impacting the loading efficiency of our electrostatic lattice. At last, we discuss how the voltages and the loading positions affect the positional distribution of trapped molecules.

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A versatile electrostatic trap with open optical access

Cited by 4 publications

References 46 publications

AC magnetic trap for cold paramagnetic molecules

AC magnetic trap for cold paramagnetic molecules

Electrostatic beam splitter for polar molecules

Electrostatic lattice preventing the nonadiabatic transition for cold polar molecules based on a molecular chip

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