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Martin Rubin - One of the best experts on this subject based on the ideXlab platform.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
arXiv: Earth and Planetary Astrophysics, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3D plasma-planetary interaction hybrid model, which produces 2D surface precipitation maps for magnetospheric H+ , O+ , O++ , and S++ . For the hot Jovian plasma, we assume isotropic precipitation onto the complete spherical surface. Two scenarios are investigated: One where no ionospheric shielding takes place and accordingly full plasma penetration is implemented ('no ionosphere' scenario), and one where an ionosphere lets virtually none of the cold plasma but all of the hot plasma reach Callisto's surface ('ionosphere' scenario). In the 3D exosphere model, neutral particles are sputtered from the surface and followed on their individual trajectories. The 3D density profiles show that whereas in the 'no ionosphere' scenario the ram direction is favored, the 'ionosphere' scenario produces almost uniform density profiles. In addition, the density profiles in the 'ionosphere' scenario are reduced by a factor of ~2.5 with respect to the 'no ionosphere' scenario. We find that the Neutral gas and Ion Mass spectrometer, which is part of the Particle Environment Package on board the JUICE mission, will be able to detect the different sputter populations from Callisto's icy surface and the major sputter populations from Callisto's non-icy surface. The chemical composition of Callisto's exosphere can be directly linked to the chemical composition of its surface, and will offer us information not only on Callisto's formation scenario but also on the building blocks of the Jupiter system.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
Journal of Geophysical Research, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3‐D plasma‐planetary interaction hybrid model, w ...
Martin Pfleger - One of the best experts on this subject based on the ideXlab platform.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
arXiv: Earth and Planetary Astrophysics, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3D plasma-planetary interaction hybrid model, which produces 2D surface precipitation maps for magnetospheric H+ , O+ , O++ , and S++ . For the hot Jovian plasma, we assume isotropic precipitation onto the complete spherical surface. Two scenarios are investigated: One where no ionospheric shielding takes place and accordingly full plasma penetration is implemented ('no ionosphere' scenario), and one where an ionosphere lets virtually none of the cold plasma but all of the hot plasma reach Callisto's surface ('ionosphere' scenario). In the 3D exosphere model, neutral particles are sputtered from the surface and followed on their individual trajectories. The 3D density profiles show that whereas in the 'no ionosphere' scenario the ram direction is favored, the 'ionosphere' scenario produces almost uniform density profiles. In addition, the density profiles in the 'ionosphere' scenario are reduced by a factor of ~2.5 with respect to the 'no ionosphere' scenario. We find that the Neutral gas and Ion Mass spectrometer, which is part of the Particle Environment Package on board the JUICE mission, will be able to detect the different sputter populations from Callisto's icy surface and the major sputter populations from Callisto's non-icy surface. The chemical composition of Callisto's exosphere can be directly linked to the chemical composition of its surface, and will offer us information not only on Callisto's formation scenario but also on the building blocks of the Jupiter system.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
Journal of Geophysical Research, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3‐D plasma‐planetary interaction hybrid model, w ...
Jesper Lindkvist - One of the best experts on this subject based on the ideXlab platform.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
arXiv: Earth and Planetary Astrophysics, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3D plasma-planetary interaction hybrid model, which produces 2D surface precipitation maps for magnetospheric H+ , O+ , O++ , and S++ . For the hot Jovian plasma, we assume isotropic precipitation onto the complete spherical surface. Two scenarios are investigated: One where no ionospheric shielding takes place and accordingly full plasma penetration is implemented ('no ionosphere' scenario), and one where an ionosphere lets virtually none of the cold plasma but all of the hot plasma reach Callisto's surface ('ionosphere' scenario). In the 3D exosphere model, neutral particles are sputtered from the surface and followed on their individual trajectories. The 3D density profiles show that whereas in the 'no ionosphere' scenario the ram direction is favored, the 'ionosphere' scenario produces almost uniform density profiles. In addition, the density profiles in the 'ionosphere' scenario are reduced by a factor of ~2.5 with respect to the 'no ionosphere' scenario. We find that the Neutral gas and Ion Mass spectrometer, which is part of the Particle Environment Package on board the JUICE mission, will be able to detect the different sputter populations from Callisto's icy surface and the major sputter populations from Callisto's non-icy surface. The chemical composition of Callisto's exosphere can be directly linked to the chemical composition of its surface, and will offer us information not only on Callisto's formation scenario but also on the building blocks of the Jupiter system.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
Journal of Geophysical Research, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3‐D plasma‐planetary interaction hybrid model, w ...
Audrey Vorburger - One of the best experts on this subject based on the ideXlab platform.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
arXiv: Earth and Planetary Astrophysics, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3D plasma-planetary interaction hybrid model, which produces 2D surface precipitation maps for magnetospheric H+ , O+ , O++ , and S++ . For the hot Jovian plasma, we assume isotropic precipitation onto the complete spherical surface. Two scenarios are investigated: One where no ionospheric shielding takes place and accordingly full plasma penetration is implemented ('no ionosphere' scenario), and one where an ionosphere lets virtually none of the cold plasma but all of the hot plasma reach Callisto's surface ('ionosphere' scenario). In the 3D exosphere model, neutral particles are sputtered from the surface and followed on their individual trajectories. The 3D density profiles show that whereas in the 'no ionosphere' scenario the ram direction is favored, the 'ionosphere' scenario produces almost uniform density profiles. In addition, the density profiles in the 'ionosphere' scenario are reduced by a factor of ~2.5 with respect to the 'no ionosphere' scenario. We find that the Neutral gas and Ion Mass spectrometer, which is part of the Particle Environment Package on board the JUICE mission, will be able to detect the different sputter populations from Callisto's icy surface and the major sputter populations from Callisto's non-icy surface. The chemical composition of Callisto's exosphere can be directly linked to the chemical composition of its surface, and will offer us information not only on Callisto's formation scenario but also on the building blocks of the Jupiter system.
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three Dimensional Modeling of callisto s surface sputtered exosphere environment
Journal of Geophysical Research, 2019Co-Authors: Audrey Vorburger, Martin Pfleger, Jesper Lindkvist, M Holmstrom, Helmut Lammer, Herbert Lichtenegger, Andre Galli, Martin RubinAbstract:We study the release of various elements from Callisto's surface into its exosphere by plasma sputtering. The cold Jovian plasma is simulated with a 3‐D plasma‐planetary interaction hybrid model, w ...
Morris Christopher - One of the best experts on this subject based on the ideXlab platform.
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Quasi-One-Dimensional Modeling of Pulse Detonation Rocket Engines
2003Co-Authors: Morris ChristopherAbstract:Pulse detonation rocket engines (PDREs) offer potential performance improvements over conventional designs, but represent a challenging Modeling task. A quasi 1-D, finite-rate chemistry CFD model for a PDRE & described and implemented. A parametric study of the effect of blowdown pressure ratio on the performance of an optimized, fixed PDRE nozzle configuration is reported. The results are compared to a steady-state rocket system using similar Modeling assumptions
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Quasi-One-Dimensional Modeling of Pulse Detonation Rocket Engines
2003Co-Authors: Morris ChristopherAbstract:This viewgraph presentation provides information on the engine cycle of a pulse detonation rocket engine (PDRE), models for optimizing the performance of a PDRE, and the performance of PDREs in comparison to Solid State Rocket Engines (SSREs)