dc.contributor.author |
Singh, S.V. |
|
dc.contributor.author |
Lakhina, G.S. |
|
dc.contributor.author |
Bharuthram, R. |
|
dc.date.accessioned |
2017-03-07T11:46:59Z |
|
dc.date.accessioned |
2021-02-12T09:49:00Z |
|
dc.date.available |
2017-03-07T11:46:59Z |
|
dc.date.available |
2021-02-12T09:49:00Z |
|
dc.date.issued |
1996 |
|
dc.identifier.citation |
Earth, Moon, and Planets, v.74/3, p.231-242, 1996, doi: 10.1007/BF00055189 |
en_US |
dc.identifier.uri |
http://localhost:8080/xmlui/handle/123456789/956 |
|
dc.description.abstract |
Energetic protons haying ring type distributions are shown to generate low-frequency electrostatic waves, propagating nearly transverse to the geomagnetic field lines, in the ring current region by exciting Mode 1 arid Mode 2 nonresonant instabilities and a resonant instability. Mode 1 nonresonant instability has frequencies around ~4 Hz with transverse wavelengths of ~(8–80) km, and it is likely to occur in the region L = (7–8). Mode 2 nonresonant instability can generate frequencies ~(850–1450) Hz with transverse wavelengths ~(2–20) km. The typical frequencies and transverse wavelengths associated with the resonant instability are (950–1250) Hz and (30–65) km. Both the Mode 2 nonresonant instability and the resonant instability can occur in the ring current region with L = (4–6). The low-frequency modes driven by energetic protons could attain maximum saturation electric field amplitude varying from 0.8 mV/m to 70 mV/m. It is suggested that the turbulence produced by the low-frequency modes may cause pitch angle scattering of ring current protons in the region outside the plasmapause resulting in the ring current decay. |
en_US |
dc.language.iso |
en |
en_US |
dc.subject |
Electric field |
en_US |
dc.subject |
Energetic protons |
en_US |
dc.subject |
Electrostatic waves |
en_US |
dc.title |
Low-frequency electric field fluctuations excited by ring current protons |
en_US |
dc.type |
Article |
en_US |
dc.identifier.accession |
091280 |
|