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Title: Axial to transverse energy mixing dynamics in octupole-based magnetostatic antihydrogen traps

Abstract

The nature of the trajectories of antihydrogen atoms confined in an octupole minimum-B trap is of great importance for upcoming spectroscopy, cooling, and gravity experiments. Of particular interest is the mixing time between the axial and transverse energies for the antiatoms. Here, using computer simulations, we establish that almost all trajectories are chaotic, and then quantify the characteristic mixing time between the axial and transverse energies. Furthermore, we find that there are two classes of trajectories: for trajectories whose axial energy is higher than about 20% of the total energy, the axial energy substantially mixes within about 10 s, whereas for trajectories whose axial energy is lower than about 10% of the total energy, the axial energy remains nearly constant for 1000 s or longer.

Authors:
; ORCiD logo;
Publication Date:
Research Org.:
Univ. of California, Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1437847
Alternate Identifier(s):
OSTI ID: 1500086
Grant/Contract Number:  
FG02-06ER54904
Resource Type:
Published Article
Journal Name:
New Journal of Physics
Additional Journal Information:
Journal Name: New Journal of Physics Journal Volume: 20 Journal Issue: 5; Journal ID: ISSN 1367-2630
Publisher:
IOP Publishing
Country of Publication:
United Kingdom
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; antihydrogen; minimum-B trap; octupole; orbit dynamics; chaos

Citation Formats

Zhong, M., Fajans, J., and Zukor, A. F. Axial to transverse energy mixing dynamics in octupole-based magnetostatic antihydrogen traps. United Kingdom: N. p., 2018. Web. doi:10.1088/1367-2630/aabb84.
Zhong, M., Fajans, J., & Zukor, A. F. Axial to transverse energy mixing dynamics in octupole-based magnetostatic antihydrogen traps. United Kingdom. doi:10.1088/1367-2630/aabb84.
Zhong, M., Fajans, J., and Zukor, A. F. Tue . "Axial to transverse energy mixing dynamics in octupole-based magnetostatic antihydrogen traps". United Kingdom. doi:10.1088/1367-2630/aabb84.
@article{osti_1437847,
title = {Axial to transverse energy mixing dynamics in octupole-based magnetostatic antihydrogen traps},
author = {Zhong, M. and Fajans, J. and Zukor, A. F.},
abstractNote = {The nature of the trajectories of antihydrogen atoms confined in an octupole minimum-B trap is of great importance for upcoming spectroscopy, cooling, and gravity experiments. Of particular interest is the mixing time between the axial and transverse energies for the antiatoms. Here, using computer simulations, we establish that almost all trajectories are chaotic, and then quantify the characteristic mixing time between the axial and transverse energies. Furthermore, we find that there are two classes of trajectories: for trajectories whose axial energy is higher than about 20% of the total energy, the axial energy substantially mixes within about 10 s, whereas for trajectories whose axial energy is lower than about 10% of the total energy, the axial energy remains nearly constant for 1000 s or longer.},
doi = {10.1088/1367-2630/aabb84},
journal = {New Journal of Physics},
number = 5,
volume = 20,
place = {United Kingdom},
year = {2018},
month = {5}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1088/1367-2630/aabb84

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