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Cassini-Plasma Inte...
Cassini-Plasma Interaction Simulations Revealing the Cassini Ion Wake Characteristics : Implications for In-Situ Data Analyses and Ion Temperature Estimates
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- Holmberg, M. K. G. (författare)
- European Space Research and Technology Center, European Space Agency, Noordwijk, The Netherlands
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- Cipriani, F. (författare)
- European Space Research and Technology Center, European Space Agency, Noordwijk, The Netherlands
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- Nilsson, Thomas (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Hess, S. (författare)
- DESP - Space Environment Department, ONERA, Toulouse, France
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- Huybrighs, H. L. F. (författare)
- European Space Research and Technology Center, European Space Agency, Noordwijk, The Netherlands
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- Hadid, L. Z. (författare)
- European Space Research and Technology Center, European Space Agency, Noordwijk, The Netherlands
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- Déprez, G. (författare)
- European Space Research and Technology Center, European Space Agency, Noordwijk, The Netherlands
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- Wilson, R. J. (författare)
- Laboratory for Atmospheric and Space Physics, University of Colorado Boulder, Boulder, CO, USA
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- Morooka, Michiko (författare)
- Uppsala universitet,Institutionen för fysik och astronomi,Institutet för rymdfysik, Uppsalaavdelningen
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- Felici, M. (författare)
- Center for Space Physics, Boston University, Boston, MA, USA
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(creator_code:org_t)
- American Geophysical Union (AGU), 2021
- 2021
- Engelska.
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Ingår i: Journal of Geophysical Research - Space Physics. - : American Geophysical Union (AGU). - 2169-9380 .- 2169-9402. ; 126:8
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- We have used Spacecraft Plasma Interaction Software (SPIS) simulations to study the characteristics (i.e., dimensions, ion depletion, and evolution with the changing spacecraft attitude) of the Cassini ion wake. We focus on two regions, the plasma disk at 4.5-4.7 RS, where the most prominent wake structure will be formed, and at 7.6 RS, close to the maximum distance at which a wake structure can be detected in the Cassini Langmuir probe (LP) data. This study also reveals how the ion wake and the spacecraft plasma interaction have impacted the Cassini LP measurements in the studied environments, for example, with a strong decrease in the measured ion density but with minor interference from the photoelectrons and secondary electrons originating from the spacecraft. The simulated ion densities and spacecraft potentials are in very good agreement with the LP measurements. This shows that SPIS is an excellent tool to use for analyses of LP data, when spacecraft material properties and environmental parameters are known and used correctly. The simulation results are also used to put constraints on the ion temperature estimates in the inner magnetosphere of Saturn. The best agreement between the simulated and measured ion density is obtained using an ion temperature of 8 eV at ∼4.6 RS. This study also shows that SPIS simulations can be used in order to better constrain plasma parameters in regions where accurate measurements are not available.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- Cassini
- ion density and temperature
- ion wake
- Langmuir probe
- Saturn's magnetosphere
- spacecraft charging
- Astronomy
- Astronomi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Holmberg, M. K. ...
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Cipriani, F.
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Nilsson, Thomas
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Hess, S.
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Huybrighs, H. L. ...
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Hadid, L. Z.
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visa fler...
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Déprez, G.
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Wilson, R. J.
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Morooka, Michiko
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Felici, M.
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visa färre...
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