Four-point high time resolution information on electron densities by the electric field experiments (EFW) on Cluster

By A. Pedersen, P. Décréau, C. Escoubet, G. Gustafsson, H. Laakso, P. Lindqvist, B. Lybekk, A. Masson, Florian Mozer, Andris Vaivads. 2001

135 citations recorded by the source corpus.

For accurate measurements of electric fields, spherical double probes are electronically controlled to be at a positive potential of approximately 1 V relative to the am- bient magnetospheric plasma. The spacecraft will acquire a potential which balances the photoelectrons escaping to the plasma and the electron flux collected from the plasma. The probe-to-plasma potential difference can be measured with a time resolution of a fraction of a second, and provides infor- mation on the electron density over a wide range of electron densities from the lobes ( 0.01 cm 3 ) to the magnetosheath (> 10 cm 3 ) and the plasmasphere (> 100 cm 3 ). This tech- nique has been perfected and calibrated against other den- sity measurements on GEOS, ISEE-1, CRRES, GEOTAIL and POLAR. The Cluster spacecraft potential measurements opens the way for new approaches, particularly near bound- aries and gradients where four-point measurements will pro- vide information never obtained before. Another interesting point is that onboard data storage of this simple parameter can be done for complete orbits and thereby will provide background information for the shorter full data collection periods on Cluster. Preliminary calibrations against other density measurements on Cluster will be reported.

Subfields: Astronomy and Astrophysics, Molecular Biology

View Paper: https://www.semanticscholar.org/paper/3a8333f1c8358b20725ef6af59ea19348c4ac8d5

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In Astronomy and Astrophysics

1. Y. Khotyaintsev
2. Z. Kale
3. Mats André
4. John W. Bonnell
5. J. Wahlund
6. M. Usanova
7. I. Dandouras
8. H. Auster

In Molecular Biology

1. Mats André
2. Andris Vaivads
3. Ian R. Mann
4. H. Singer
5. Y. Khotyaintsev
6. K. Mursula
7. V. Angelopoulos

Citations in the corpus

• First results of electric field and density observations by Cluster EFW based on initial months of operation (2001, methodology): “EFW data are also analysed and presented in other papers in this issue (André et al., 2001; Pedersen et al., 2001).”
• Electron density estimations derived from spacecraft potential measurements on Cluster in tenuous plasma regions (2008, background): “…[e.g., Pedersen, 1995; Escoubet et al., 1997; Laakso and Pedersen, 1998; Pedersen et al., 1998; Nakagawa et al., 2000; Scudder et al., 2000; Pedersen et al., 2001; Laakso et al., 2002; Thiébault et al., 2006] This paper is a follow-on to Pedersen et al. [2001], where the early spacecraft…”
• Multipoint observations of magnetospheric compression‐related EMIC Pc1 waves by THEMIS and CARISMA (2008, background): “Olson and Lee [1983] suggested that magnetospheric compressions cause an increase in hot proton temperature anisotropy.”