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Titolo:
ON THE AMPLITUDE OF INTENSE LANGMUIR-WAVES IN THE TERRESTRIAL ELECTRON FORESHOCK
Autore:
BALE SD; BURGESS D; KELLOGG PJ; GOETZ K; MONSON SJ;
Indirizzi:
UNIV LONDON QUEEN MARY & WESTFIELD COLL,SCH MATH SCI,ASTRON UNIT,MILEEND RD LONDON E1 4NS ENGLAND UNIV MINNESOTA,SCH PHYS & ASTRON MINNEAPOLIS MN 55455
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
fascicolo: A6, volume: 102, anno: 1997,
pagine: 11281 - 11286
SICI:
2169-9380(1997)102:A6<11281:OTAOIL>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
EARTHS BOW SHOCK; PLASMA-WAVES; WIND SPACECRAFT; SOLAR-WIND; TURBULENCE; FREQUENCY; COLLAPSE; RADIO; DECAY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
29
Recensione:
Indirizzi per estratti:
Citazione:
S.D. Bale et al., "ON THE AMPLITUDE OF INTENSE LANGMUIR-WAVES IN THE TERRESTRIAL ELECTRON FORESHOCK", J GEO R-S P, 102(A6), 1997, pp. 11281-11286

Abstract

Waveforms of large-amplitude Langmuir oscillations were recorded by the Wind spacecraft in the Earth's upstream electron foreshock region. We present some statistics of the waveforms and discuss them in the context of various saturation mechanisms. In particular, it is found that the value of E-peak/E-rms is not large, as previously suggested, andthat the largest-amplitude Langmuir waveforms are generally somewhat sinusoidal and lack structure on small spatial scales. The measured probability distribution of electric field amplitude and dimensionless energy suggest that some stochastic process may play a role in wave generation. The values of dimensionless energy needed to arrest Langmuir wave collapse occur with very small probability and the value of E-peak/E-rms for large fields suggests that, statistically, Langmuir wave collapse is not an important process in the terrestrial foreshock.

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Documento generato il 28/09/20 alle ore 15:21:38