We report Alfvén-wave experiments with liquid rubidium at the Dresden High Magnetic Field Laboratory. Reaching up to 63 T, the pulsed magnetic field exceeds the critical value of 54 T at which the Alfvén speed coincides with the sound speed. At this threshold, we observe a period doubling of an applied 8 kHz cw excitation, which is consistent with the theoretical expectation of a parametric resonance between magnetosonic waves and Alfvén waves. Similar mode conversions are discussed as a possible mechanism for heating the solar corona.
Description
Mode Conversion and Period Doubling in a Liquid Rubidium Alfvén-Wave Experiment with Coinciding Sound and Alfvén Speeds
%0 Journal Article
%1 PhysRevLett.127.275001
%A Stefani, F
%A Forbriger, J
%A Gundrum, Th
%A Herrmannsdörfer, T
%A Wosnitza, J
%D 2021
%I American Physical Society
%J Phys. Rev. Lett.
%K a
%N 27
%P 275001
%R 10.1103/PhysRevLett.127.275001
%T Mode conversion and period doubling in a liquid rubidium Alfvén-wave experiment with coinciding sound and Alfvén speeds
%U https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.127.275001
%V 127
%X We report Alfvén-wave experiments with liquid rubidium at the Dresden High Magnetic Field Laboratory. Reaching up to 63 T, the pulsed magnetic field exceeds the critical value of 54 T at which the Alfvén speed coincides with the sound speed. At this threshold, we observe a period doubling of an applied 8 kHz cw excitation, which is consistent with the theoretical expectation of a parametric resonance between magnetosonic waves and Alfvén waves. Similar mode conversions are discussed as a possible mechanism for heating the solar corona.
@article{PhysRevLett.127.275001,
abstract = {We report Alfvén-wave experiments with liquid rubidium at the Dresden High Magnetic Field Laboratory. Reaching up to 63 T, the pulsed magnetic field exceeds the critical value of 54 T at which the Alfvén speed coincides with the sound speed. At this threshold, we observe a period doubling of an applied 8 kHz cw excitation, which is consistent with the theoretical expectation of a parametric resonance between magnetosonic waves and Alfvén waves. Similar mode conversions are discussed as a possible mechanism for heating the solar corona.},
added-at = {2023-03-08T15:02:01.000+0100},
author = {Stefani, F and Forbriger, J and Gundrum, Th and Herrmannsdörfer, T and Wosnitza, J},
biburl = {https://www.bibsonomy.org/bibtex/224a3e281f84fffbd3012c69a79e0893a/ctqmat},
day = 29,
description = {Mode Conversion and Period Doubling in a Liquid Rubidium Alfvén-Wave Experiment with Coinciding Sound and Alfvén Speeds},
doi = {10.1103/PhysRevLett.127.275001},
interhash = {20b0f15a04efb833cc8fefe4f76ba408},
intrahash = {24a3e281f84fffbd3012c69a79e0893a},
journal = {Phys. Rev. Lett.},
keywords = {a},
month = {12},
number = 27,
numpages = {5},
pages = 275001,
publisher = {American Physical Society},
timestamp = {2023-03-14T07:29:18.000+0100},
title = {Mode conversion and period doubling in a liquid rubidium Alfvén-wave experiment with coinciding sound and Alfvén speeds},
url = {https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.127.275001},
volume = 127,
year = 2021
}