The one-dimensional camelback potential in the parallel dipole line trap: Stability conditions and finite size effect

Gunawan, Oki; Virgus, Yudistira

doi:10.1063/1.4978876

The one-dimensional camelback potential in the parallel dipole line trap: Stability conditions and finite size effect

Journal Article · Tue Apr 04 00:00:00 EDT 2017 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4978876· OSTI ID:1465332

^[1]; Virgus, Yudistira ^[2]

IBM T. J. Watson Research Center, Yorktown Heights, NY (United States); IBM
IBM T. J. Watson Research Center, Yorktown Heights, NY (United States)

We recently demonstrated a magnetic parallel dipole line (PDL) system that serves as a unique diamagnetic trap with a fascinating one-dimensional camelback potential along its longitudinal axis. The system can be realized with a pair of transversely magnetized cylindrical magnets and a cylindrical graphite rod as the trapped object. In this paper, we present more detailed experimental and theoretical studies of the finite size effect of the rod and its impact on the stability and oscillation dynamics of the trap. We show that the camelback potential effect only occurs when the length of the PDL system is beyond certain critical length (L_C). The length of the trapped rod determines the “effective camelback potential” and is subject to maximum and minimum values for the trap to be stable. Both length and radius of the rod determine the damping dynamics or the quality factor of the oscillator. Finally, these characteristics are important for designing the PDL trap system for various sensing applications, for example, we demonstrated a PDL trap gas viscometer system through measurement of the oscillation damping time constant.

View Accepted Manuscript (DOE)

Research Organization:: IBM T. J. Watson Research Center, Yorktown Heights, NY (United States)

Sponsoring Organization:: USDOE Advanced Research Projects Agency - Energy (ARPA-E)

Grant/Contract Number:: AR0000540

OSTI ID:: 1465332

Alternate ID(s):: OSTI ID: 1993649

Journal Information:: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 13 Vol. 121; ISSN 0021-8979

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited By (1)

Carrier-resolved photo-Hall effect Gunawan, Oki; Pae, Seong Ryul; Bishop, Douglas M. Nature, Vol. 575, Issue 7781 https://doi.org/10.1038/s41586-019-1632-2	journal	October 2019

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The one-dimensional camelback potential in the parallel dipole line trap: Stability conditions and finite size effect

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