Proton Cylotron Waves at 1 AU: ISEE-3
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Proton Cyclotron Waves↗
Engineering topics
Murphy, N.
Publications and source records attributed to Murphy, N..
(abstract) Ulysses Observations of Magnetic Nulls in the Solar Wind
High time resolution magnetic field measurements (1 vector/s) at radial distances out to 5.3 AU and heliographic latitudes from 0(deg) to > 35(deg) S reveal the presence of solitary pulses lasting tens of seconds in which the field magnitude approaches or reaches zero. The properties of these nulls, their spatial distribution and relation to solar wind structures and to similar-apppearing interplanetary and magnetospheric impulses will be discussed.
magnetic impulses solar wind magnetic nulls Ulysse↗
Further Studies of Waves Accompanying the Solar Wind Pick-Up of Interstella Hydronge
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Solar Wind Ulysses↗
Thin current sheets in the deep geomagnetic tail
The International Sun-Earth Explorer 3 (ISEE-3) magnetic field and plasma electron data from Jan - March 1983 have been searched to study thin current sheets in the deep tail region. 33 events were selected where the spacecraft crossed through the current sheet from lobe to lobe within 15 minutes. The average thickness of the observed current sheets was 2.45 R(sub E), and in 24 cases the current sheet was thinner than 3.0 R(sub E); 6 very thin current sheets (thickness lambda less than 0.5 R(sub E) were found. The electron data show that the very thin current sheets are associated with considerable temperature anisotropy. On average, the electron gradient current was about 17% of the total current, whereas the current arising from the electron temperature anisotropy varied between 8-45% of the total current determined from the lobe field magnitude.
Pulkkinen, T. I.↗
Energetic Ion Beams Near the Heliospheric Current Sheet: Possible Evidence for Reconnection
Energetic ion data, close to solar wind sector boundaries (the heliospheric current sheet), are examined for the presence of accelerated ions, which may be the signature of magnetic reconnection.
magnetic field plasma data accelerated ionssolar f↗
Magnetic field observations during the Ulysses flyby of Jupiter
The Ulysses magnetic field measurements confirmed the general structure of the dayside magnetosphere and showed that the importance of the current sheet dynamics extends well into the middle and outer magnetosphere. On the dusk side, the magnetic field was found to be swept back significantly toward the magnetotail. It is pointed out that the external current densities need to be modified with respect to previous observations on the inbound pass which shows that Jovian magnetic and magnetospheric models are highly sensitive to both the intensity and the structure assumed for the current sheet. Data obtained revealed that all boundaries and boundary layers in the magnetosphere have a very complex microstructure.
Balogh, A.↗
Enhancements of energetic ions associated with travelling compression regions in the deep geomagnetic tail
This paper presents a representative example of an enhancement in energetic ion flux associated with the International Sun-Earth Explorer 3 (ISEE 3) spacecraft's encounter with a traveling compression region (TCR). Data from the energetic particle anisotropy spectrometer (EPAS) instrument on ISEE 3 are studied, along with magnetic field data from the vector helium magnetometer. It is concluded that the ion enhancements seen are spatial in nature, thus supporting the idea that TCRs are the lobe signatures of plasmoids moving along the magnetotail, away from earth.
Murphy, N.↗