Recent research on magnetospheric wave-particle interactions
Highlights of recent Stanford University VLF research in the Antarctic include new observations of wave-induced particle precipitation and controlled experiments on nonlinear wave growth phenomena. Higher-than-expected levels of burst precipitation have been discovered inside the plasmasphere, near...
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ftnipr:oai:nipr.repo.nii.ac.jp:00001808 2023-05-15T13:47:59+02:00 Recent research on magnetospheric wave-particle interactions R.A. Helliwell U.S. Inan J.P. Katsufrakis D.L. Carpenter E.W. Paschal 1985-12 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1808 http://id.nii.ac.jp/1291/00001808/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1808&item_no=1&attribute_id=18&file_no=1 en eng Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1808 http://id.nii.ac.jp/1291/00001808/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 38, 83-98(1985-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1808&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 1985 ftnipr 2022-11-12T19:42:40Z Highlights of recent Stanford University VLF research in the Antarctic include new observations of wave-induced particle precipitation and controlled experiments on nonlinear wave growth phenomena. Higher-than-expected levels of burst precipitation have been discovered inside the plasmasphere, near L=2,using subionospheric signal perturbations called "Trimpi events". Studies of burst precipitation have been extended to the region poleward of the plasmapause using the Siple transmitter signal as a waveguide probe. Experiments on the "coherent wave instability", using the amplitude and frequency modulation capability of the new Siple transmitter, have produced exciting new results. Examples are : 1) better definition of the power threshold for the stimulation of temporal wave growth, 2) generation of strong sidebands by unamplified "beat" waves and 3) generation of chorus-like elements within a band of simulated hiss. Using a new digital processing technique developed at Stanford, new features of the phase behavior of growing waves have been found. Opportunities for extending these experiments are discussed. Report Antarc* Antarctic Memoirs of National Institute of Polar Research Polar Research National Institute of Polar Research Repository, Japan Antarctic Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) The Antarctic Trimpi ENVELOPE(-72.782,-72.782,-75.345,-75.345) |
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Open Polar |
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National Institute of Polar Research Repository, Japan |
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ftnipr |
language |
English |
description |
Highlights of recent Stanford University VLF research in the Antarctic include new observations of wave-induced particle precipitation and controlled experiments on nonlinear wave growth phenomena. Higher-than-expected levels of burst precipitation have been discovered inside the plasmasphere, near L=2,using subionospheric signal perturbations called "Trimpi events". Studies of burst precipitation have been extended to the region poleward of the plasmapause using the Siple transmitter signal as a waveguide probe. Experiments on the "coherent wave instability", using the amplitude and frequency modulation capability of the new Siple transmitter, have produced exciting new results. Examples are : 1) better definition of the power threshold for the stimulation of temporal wave growth, 2) generation of strong sidebands by unamplified "beat" waves and 3) generation of chorus-like elements within a band of simulated hiss. Using a new digital processing technique developed at Stanford, new features of the phase behavior of growing waves have been found. Opportunities for extending these experiments are discussed. |
format |
Report |
author |
R.A. Helliwell U.S. Inan J.P. Katsufrakis D.L. Carpenter E.W. Paschal |
spellingShingle |
R.A. Helliwell U.S. Inan J.P. Katsufrakis D.L. Carpenter E.W. Paschal Recent research on magnetospheric wave-particle interactions |
author_facet |
R.A. Helliwell U.S. Inan J.P. Katsufrakis D.L. Carpenter E.W. Paschal |
author_sort |
R.A. Helliwell |
title |
Recent research on magnetospheric wave-particle interactions |
title_short |
Recent research on magnetospheric wave-particle interactions |
title_full |
Recent research on magnetospheric wave-particle interactions |
title_fullStr |
Recent research on magnetospheric wave-particle interactions |
title_full_unstemmed |
Recent research on magnetospheric wave-particle interactions |
title_sort |
recent research on magnetospheric wave-particle interactions |
publisher |
Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University/Space, Telecommunications, and Radioscience Laboratory, Stanford University |
publishDate |
1985 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1808 http://id.nii.ac.jp/1291/00001808/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1808&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-72.782,-72.782,-75.345,-75.345) |
geographic |
Antarctic Siple The Antarctic Trimpi |
geographic_facet |
Antarctic Siple The Antarctic Trimpi |
genre |
Antarc* Antarctic Memoirs of National Institute of Polar Research Polar Research |
genre_facet |
Antarc* Antarctic Memoirs of National Institute of Polar Research Polar Research |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1808 http://id.nii.ac.jp/1291/00001808/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 38, 83-98(1985-12) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1808&item_no=1&attribute_id=18&file_no=1 |
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1766248312711675904 |