Overshoot phenomena: Observation and simulation
High-power O-mode radio waves can excite artificial instabilities in the F region, according to experiments conducted at the European Incoherent Scatter Science Association (EISCAT) heating facility. The main instabilities include the parametric decay instability (PDI), oscillating two-stream instab...
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ftdoajarticles:oai:doaj.org/article:ad18261c0bbf4428bec1b00bab1b81cf 2024-09-15T18:04:29+00:00 Overshoot phenomena: Observation and simulation Ting Feng MoRan Liu ShiMin He Xiang Wang Chen Zhou 2024-03-01T00:00:00Z https://doi.org/10.26464/epp2024010 https://doaj.org/article/ad18261c0bbf4428bec1b00bab1b81cf EN eng Science Press http://www.eppcgs.org/article/doi/10.26464/epp2024010?pageType=en https://doaj.org/toc/2096-3955 2096-3955 doi:10.26464/epp2024010 https://doaj.org/article/ad18261c0bbf4428bec1b00bab1b81cf Earth and Planetary Physics, Vol 8, Iss 2, Pp 391-399 (2024) overshoot parametric decay instability oscillating two-stream instability competition Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 article 2024 ftdoajarticles https://doi.org/10.26464/epp2024010 2024-08-05T17:49:52Z High-power O-mode radio waves can excite artificial instabilities in the F region, according to experiments conducted at the European Incoherent Scatter Science Association (EISCAT) heating facility. The main instabilities include the parametric decay instability (PDI), oscillating two-stream instability (OTSI), and thermal parametric instability (TPI). The PDI and OTSI not only compete with each other, but also compete with the TPI, leading to a two-stage overshoot phenomenon: a miniovershoot occurs on a millisecond time scale after pump-on, followed by the main overshoot. We gain insight into the miniovershoot via a generalized Zakharov model, whereas the main overshoot can be observed as an enhanced plasma line overshoot phenomenon in incoherent scatter radar spectra. We can also observe that the zero-frequency ion line exists only in the initial heating period after a cold start and that the upshifted and downshifted ion lines behave irregularly in the spectra. The simulation results show that competition between the PDI and OTSI leads to an initial peak, which we named the pre-miniovershoot. The following processes, namely ion density caviton generation, and collapse and cascade in the development of the PDI, contribute to the miniovershoot phenomenon. Article in Journal/Newspaper EISCAT Directory of Open Access Journals: DOAJ Articles Earth and Planetary Physics 8 2 0 0 |
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Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
overshoot parametric decay instability oscillating two-stream instability competition Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 |
spellingShingle |
overshoot parametric decay instability oscillating two-stream instability competition Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 Ting Feng MoRan Liu ShiMin He Xiang Wang Chen Zhou Overshoot phenomena: Observation and simulation |
topic_facet |
overshoot parametric decay instability oscillating two-stream instability competition Science Q Geophysics. Cosmic physics QC801-809 Environmental sciences GE1-350 |
description |
High-power O-mode radio waves can excite artificial instabilities in the F region, according to experiments conducted at the European Incoherent Scatter Science Association (EISCAT) heating facility. The main instabilities include the parametric decay instability (PDI), oscillating two-stream instability (OTSI), and thermal parametric instability (TPI). The PDI and OTSI not only compete with each other, but also compete with the TPI, leading to a two-stage overshoot phenomenon: a miniovershoot occurs on a millisecond time scale after pump-on, followed by the main overshoot. We gain insight into the miniovershoot via a generalized Zakharov model, whereas the main overshoot can be observed as an enhanced plasma line overshoot phenomenon in incoherent scatter radar spectra. We can also observe that the zero-frequency ion line exists only in the initial heating period after a cold start and that the upshifted and downshifted ion lines behave irregularly in the spectra. The simulation results show that competition between the PDI and OTSI leads to an initial peak, which we named the pre-miniovershoot. The following processes, namely ion density caviton generation, and collapse and cascade in the development of the PDI, contribute to the miniovershoot phenomenon. |
format |
Article in Journal/Newspaper |
author |
Ting Feng MoRan Liu ShiMin He Xiang Wang Chen Zhou |
author_facet |
Ting Feng MoRan Liu ShiMin He Xiang Wang Chen Zhou |
author_sort |
Ting Feng |
title |
Overshoot phenomena: Observation and simulation |
title_short |
Overshoot phenomena: Observation and simulation |
title_full |
Overshoot phenomena: Observation and simulation |
title_fullStr |
Overshoot phenomena: Observation and simulation |
title_full_unstemmed |
Overshoot phenomena: Observation and simulation |
title_sort |
overshoot phenomena: observation and simulation |
publisher |
Science Press |
publishDate |
2024 |
url |
https://doi.org/10.26464/epp2024010 https://doaj.org/article/ad18261c0bbf4428bec1b00bab1b81cf |
genre |
EISCAT |
genre_facet |
EISCAT |
op_source |
Earth and Planetary Physics, Vol 8, Iss 2, Pp 391-399 (2024) |
op_relation |
http://www.eppcgs.org/article/doi/10.26464/epp2024010?pageType=en https://doaj.org/toc/2096-3955 2096-3955 doi:10.26464/epp2024010 https://doaj.org/article/ad18261c0bbf4428bec1b00bab1b81cf |
op_doi |
https://doi.org/10.26464/epp2024010 |
container_title |
Earth and Planetary Physics |
container_volume |
8 |
container_issue |
2 |
container_start_page |
0 |
op_container_end_page |
0 |
_version_ |
1810441987604611072 |