How electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission

Simple item page
dc.contributor.authorChea, Haihong
dc.contributor.authorGoldstein, Melvyn
dc.contributor.authorDiamond, Patrick H.
dc.contributor.authorSagdeev, Roald Z.
dc.date.accessioned2024-01-18T02:22:05Z
dc.date.available2024-01-18T02:22:05Z
dc.date.issued2017-01-30
dc.description.abstractContinuous plasma coherent emission is maintained by repetitive Langmuir collapse driven by the nonlinear evolution of a strong electron two-stream instability. The Langmuir waves are modulated by solitary waves in the linear stage and electrostatic whistler waves in the nonlinear stage. Modulational instability leads to Langmuir collapse and electron heating that fills in cavitons. The high pressure is released via excitation of a short-wavelength ion acoustic mode that is damped by electrons and reexcites small-scale Langmuir waves; this process closes a feedback loop that maintains the continuous coherent emission.
dc.description.sponsorshipH.C. and P.H.D. thank participants for discussions in the “8th Festival de Théorie,” Aix-en-Provence, France, 2015. P.H.D. thanks M. Malkov for discussions. This work was supported by the NASA Magnetospheric Multiscale Mission in association with NASA Contract NNG04EB99C (to H.C.) and Department of Energy Grant DE-FG02-04ER54738 (to P.H.D.). The simulations and analysis were carried out at the NASA Advanced Supercomputing facility at Ames Research Center under NASA High-End Computing Program Awards SMD-14-4848 and SMD-15-5715.
dc.description.urihttps://www.pnas.org/doi/full/10.1073/pnas.1614055114
dc.format.extent9 pages
dc.genrejournal articles
dc.identifier.citationChe, Haihong, Melvyn L. Goldstein, Patrick H. Diamond, and Roald Z. Sagdeev. “How Electron Two-Stream Instability Drives Cyclic Langmuir Collapse and Continuous Coherent Emission.” Proceedings of the National Academy of Sciences 114, no. 7 (February 14, 2017): 1502–7. https://doi.org/10.1073/pnas.1614055114.
dc.identifier.urihttps://doi.org/10.1073/pnas.1614055114
dc.identifier.urihttp://hdl.handle.net/11603/31336
dc.language.isoen_US
dc.publisherPNAS
dc.relation.isAvailableAtThe University of Maryland, Baltimore County (UMBC)
dc.relation.ispartofUMBC Goddard Planetary Heliophysics Institute (GPHI)
dc.relation.ispartofUMBC Faculty Collection
dc.rightsThis item is likely protected under Title 17 of the U.S. Copyright Law. Unless on a Creative Commons license, for uses protected by Copyright Law, contact the copyright holder or the author.
dc.titleHow electron two-stream instability drives cyclic Langmuir collapse and continuous coherent emission
dc.title.alternativeContinuous plasma emission via repeating Langmuir collapse driven by strong electron two-stream instability
dc.typeText
dcterms.creatorhttps://orcid.org/0000-0002-5317-988X

Files

Original bundle

Now showing 1 - 2 of 2
Thumbnail Image
Name:
1702.00784.pdf
Size:
973 KB
Format:
Adobe Portable Document Format
Download
Thumbnail Image
Name:
pnas.1614055114.sm02.zip
Size:
21.05 MB
Format:
Unknown data format
Download

License bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.56 KB
Format:
Item-specific license agreed upon to submission
Description:
Download

Collections

UMBC Goddard Planetary Heliophysics Institute (GPHI)
UMBC Faculty Collection