Small scale structure of magnetospheric electron density through on-line tracking of plasma resonances

Higel, B.

doi:10.1007/bf00223944

Cited by 39 publications

(29 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(HIGEL, 1978) and ISEE (HARVEY et al, 1979), the same effects has already been detected. We can give independent confirmation and also give further detailed analyses on the characteristics of FQn resonances in the magnetosphere.…”

Section: Plasma Resonancesupporting

confidence: 70%

“…When the experiment will be carried out in the ionospheric plasma, the result will be same as the case of the Alouette and ISIS (HAGG et al, 1969). The experiment is also same in the basic configuration of the system as the case of "Relaxation Sounder" experiment on board GEOS (ETCHETO and BLOCH, 1978;HIGEL, 1978) and ISEE (HARVEY et al, 1979).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Stimulation of plasma waves in the magnetosphere using satellite JIKIKEN (EXOS-B). Part I. Observation of plasma resonances.

Oya

Ono

Kamada

1981

J. geomagn. geoelec

View full text Add to dashboard Cite

The stimulated plasma wave experiment (SPW) has been successfully carried out in the plasmasphere and the magnetosphere along the JIKIKEN (EXOS-B) satellite orbit where the plasma parameters indicate wide variety of the combination of the electron number density ranging from 1/cc to 104/cc, and the electron cyclotron frequency ranging from 6 kHz to 200 kHz.The observed plasma resonances are: i) the upper hybrid resonance FIIHR, ii) the plasma resonance FP, iii) the higher harmonics of the electron cyclotron resonance nFH, iv) the electrostatic resonance FQn, and v) the of the diffuse resonance FDn. The upper hybrid resonances usually persists for long periods up to 125 msec and the electron cyclotron resonances are stimulated at frequency with the very high harmonic number n; sometimes, the nFH resonance takes place for n>30.The detection of the plasma resonance FP is more difficult compared with the case of the observation of the FIIHR resonance due to the expanded wavelength of the electrostatic plasma waves near at FP. The observation of the diffuse resonances is the most difficult case in the magnetosphere since the energy of the plasma in the magnetosphere overcomes the electric field intensity generated by the SPW pulse transmission. All the features of the resonances reflect the characteristics of the magnetospheric plasma that contains the energetic and non-Maxwellian components of the particles. The measurement of the plasma resonance contributes to the detection of the local electron density, magnetic field intensity; conditions for the wave particle interactions are also analyzed from the duration features of the plasma resonances.

show abstract

Section: Plasma Resonancesupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Stimulation of plasma waves in the magnetosphere using satellite JIKIKEN (EXOS-B). Part I. Observation of plasma resonances.

Oya

Ono

Kamada

1981

J. geomagn. geoelec

View full text Add to dashboard Cite

show abstract

“…Higel (1978) examined GEOS 1 observations of density fluctuations with time scales varying between a few 10 −1 s and 10 s (or spatial scales between a few 10 2 m and 10 km). CRRES (Combined Release and Radiation Effects Satellite) measured density fluctuations with a spectral power-law index of −5/3 (LeDocq et al, 1994).…”

Section: Introductionmentioning

confidence: 99%

Multi-spacecraft observations of small-scale fluctuations in density and fields in plasmaspheric plumes

et al. 2012

View full text Add to dashboard Cite

Abstract. In this event study, small-scale fluctuations in plasmaspheric plumes with time scales of ∼10 s to minutes in the spacecraft frame are examined. In one event, plasmaspheric plumes are observed by Cluster, while IMAGE measured density enhancement at a similar location. Fluctuations in density exist in plumes as detected by Cluster and are accompanied by fluctuations in magnetic fields and electric fields. Magnetic fluctuations are transverse and along the direction of the plumes. The E/B ratio is smaller than the Alfvén velocity. Another similar event is briefly presented. We then consider physical properties of the fluctuations. Alfvén mode modulated by the feedback instability is one possibility, although non-local generation is likely. It is hard to show that the fluctuations represent a fast mode. Interchange motion is possible due to the consistency between measurements and expectations. The energy source could be a pressure or density gradient in plasmaspheric plumes. When more events are accumulated so that statistical analysis becomes feasible, this type of study will be useful to understand the time evolution of plumes.

show abstract

“…There are several reports on the irregularity of the plasma distribution associated with the plasmapause formation (KIVELSON, 1976;HIGEL, 1978). The present experiment served to a systematic collection of data on the irregularities near the plasmapause.…”

Section: S Irregularity Of the Plasma Distribution In The Vicinity Omentioning

confidence: 93%

“…On the other hand in the magnetosphere, the existence of the plasmapause that was initially proposed by CARPENTER (1963CARPENTER ( , 1966 using the whistler wave propagation has been confirmed by an in-situ observation technique employing plasma particle detectors (CHAPPELL et al,1970;CHAPPELL, 1972). Recently the plasmapause has been measured by a relaxation sounder on board GEOS-1 satellite (ETCHETO and BLUCH,1978;HIGEL, 1978); the results of the relaxation sounder experiments give a different feature in some detailed points compared with the results from the particle detectors. That is, the region outside the plasmapause is filled with relatively cold plasma of high density.…”

Section: Introductionmentioning

confidence: 90%

Stimulation of plasma waves in the magnetosphere using satellite JIKIKEN (EXOS-B). Part II. Plasma Density across the plasmapause.

Oya

Ono

1987

J. geomagn. geoelec

View full text Add to dashboard Cite

The electron number density across the plasmapause was accurately measured using an RF sounder on board the Jikiken satellite, which was launched from Kagoshima Space Center in Japan on September 16, 1978, into an orbit with the initial apogee of 30,051 km and the perigee of 227 km. The electron number density was determined by observing plasma resonances such as the electron plasma resonance (FP), the electron cyclotron resonance (nFH) and the upper hybrid resonance (FUHR), which were not affected by the turbulences surrounding the satellite. The electron number density outside of the plasmapause showed values greater by one order of magnitude than the previous observations using particle detectors. Outside the plasmapause in the dayside region, there is a good agreement with an L-4 relationship in the electron number density profile, as is consistent with a large inflation of the plasma due to a supply from the ionosphere. The location of the plasmapause has been examined as a function of the geomagnetic activity including the dead calm state. Two types of irregularities were found in the electron number density profiles crossing the plasmapause:' i) a large scale irregularity with the

show abstract

Small scale structure of magnetospheric electron density through on-line tracking of plasma resonances

Cited by 39 publications

References 0 publications

Stimulation of plasma waves in the magnetosphere using satellite JIKIKEN (EXOS-B). Part I. Observation of plasma resonances.

Stimulation of plasma waves in the magnetosphere using satellite JIKIKEN (EXOS-B). Part I. Observation of plasma resonances.

Multi-spacecraft observations of small-scale fluctuations in density and fields in plasmaspheric plumes

Stimulation of plasma waves in the magnetosphere using satellite JIKIKEN (EXOS-B). Part II. Plasma Density across the plasmapause.

Contact Info

Product

Resources

About