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1. Magnetospheric Venus Space Explorers (MVSE) Mission: A Proposal for Understanding the Dynamics of Induced Magnetospheres

Author

Albers, Roland, Andrews, Henrik, Boccacci, Gabriele, Pires, Vasco D. C, Laddha, Sunny, Lundén, Ville, Maraqten, Nadim, Matias, João, Krämer, Eva, Schulz, Leonard, Palanca, Ines Terraza, Teubenbacher, Daniel, Baskevitch, Claire, Covella, Francesca, Cressa, Luca, Moreno, Juan Garrido, Gillmayr, Jana, Hollowood, Joshua, Huber, Kilian, Kutnohorsky, Viktoria, Lennerstrand, Sofia, Malatinszky, Adel, Manzini, Davide, Maurer, Manuel, Nidele, Daiana Maria Alessandra, Rigon, Luca, Sinjan, Jonas, Suarez, Crisel, Viviano, Mirko, and Knutsen, Elise Wright

Subjects
Physics - Space Physics
Abstract

Induced magnetospheres form around planetary bodies with atmospheres through the interaction of the solar wind with their ionosphere. Induced magnetospheres are highly dependent on the solar wind conditions and have only been studied with single spacecraft missions in the past. This gap in knowledge could be addressed by a multi-spacecraft plasma mission, optimized for studying global spatial and temporal variations in the magnetospheric system around Venus, which hosts the most prominent example of an induced magnetosphere in our solar system. The MVSE mission comprises four satellites, of which three are identical scientific spacecraft, carrying the same suite of instruments probing different regions of the induced magnetosphere and the solar wind simultaneously. The fourth spacecraft is the transfer vehicle which acts as a relay satellite for communications at Venus. In this way, changes in the solar wind conditions and extreme solar events can be observed, and their effects can be quantified as they propagate through the Venusian induced magnetosphere. Additionally, energy transfer in the Venusian induced magnetosphere can be investigated. The scientific payload includes instrumentation to measure the magnetic field, electric field, and ion-electron velocity distributions. This study presents the scientific motivation for the mission as well as requirements and the resulting mission design. Concretely, a mission timeline along with a complete spacecraft design, including mass, power, communication, propulsion and thermal budgets are given. This mission was initially conceived at the Alpbach Summer School 2022 and refined during a week-long study at ESAs Concurrent Design Facility in Redu, Belgium, Comment: 23 pages, 5 figures, Submitted to Acta Astronautica

Published
2023

2. Magnetospheric Venus Space Explorers (MVSE) mission: A proposal for understanding the dynamics of induced magnetospheres

Author

Albers, Roland, Andrews, Henrik, Boccacci, Gabriele, Pires, Vasco D.C., Laddha, Sunny, Lundén, Ville, Maraqten, Nadim, Matias, João, Krämer, Eva, Schulz, Leonard, Palanca, Ines Terraza, Teubenbacher, Daniel, Baskevitch, Claire, Covella, Francesca, Cressa, Luca, Moreno, Juan Garrido, Gillmayr, Jana, Hollowood, Joshua, Huber, Kilian, Kutnohorsky, Viktoria, Lennerstrand, Sofia, Malatinszky, Adel, Manzini, Davide, Maurer, Manuel, Nidelea, Daiana Maria Alessandra, Rigon, Luca, Sinjan, Jonas, Suarez, Crisel, Viviano, Mirko, and Knutsen, Elise Wright

Published
2024
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5. Development of the Onboard Calibration Target for the Arctic Weather Satellite

Author

Albers, Roland, Pluss, Tobias, Eggimann, Lars, and Murk, Axel

Abstract

We present the design and characterization of the onboard calibration target (OBCT) for the arctic weather Satellite radiometer. The arctic weather satellite (AWS) is a single-instrument mission consisting of a cross-track scanning microwave radiometer. The radiometer optics consists of a feed cluster with four horns (54, 89, 183, and 325 GHz) directly illuminating a primary scanning mirror. The OBCT is a wedge-shaped cavity with an absorber consisting of an epoxy-based mixture, developed and produced by the University of Bern. The coupling into the target via a secondary mirror is simulated using Ticra Tools and the effects of the divergent beams are investigated. We present the development of the target and laboratory measurements of the flight model showing a return loss of 55 dB or better for all bands in TM mode. A worst case thermal simulation is presented, highlighting possible temperature gradients in the target.

Published
2024
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8. Theoretische und experimentelle Untersuchungen an elektrostatischen Wechselstromgeneratoren mit flüssigen polaren Dielektrika

Author

Albers, Roland, Dittrich, Wolfgang (Prof. Dr. Dr. habil.), Igenbergs, Eduard (Prof. Dr.), and Wagner, Ulrich (Prof. Dr.)

Subjects
Electrostatic, generator, AC, Dielectrics, Elektrostatik, Generator, Wechselstrom, Dielektrikum, ddc:620, Ingenieurswissenschaften
Abstract

Die Arbeit beschreibt die Theorie, Konstruktion und die experimentelle Umsetzung elektrostatischer Hochspannungs-Wechselstromgeneratoren. Der mechanische Aufbau entspricht dem eines elektrostatischen Gleichstrom–Trommelgenerators. Zur Leistungssteigerung ist der Bereich zwischen Rotor und Stator mit einer polaren Flüssigkeit gefüllt. Die Frequenz des erzeugten Stromes ist gleich der Frequenz der Erregerspannung und unabhängig von der Drehzahl. Die Ergebnisse der Strom- und Spannungsberechnungen werden mit Hilfe der Meßdaten zweier Versuchsgeneratoren verifiziert. Im Vergleich zu elektromagnetischen Maschinen sind rechnerisch für verschiedene Anwendungsgebiete Gewichts- und Volumenvorteile zu erwarten. The paper presents the theorie, design and experimental implementation of electrostatic high voltage ac generators. The design is analogous to an electrostatic drum-type dc generator. To improve the power output, the space between rotor and stator is filled with a polar liquid. The frequency of the output current is equal to the frequency of the excitation voltage and independent of the rotor speed. The results of the calculation of the output voltage and current are verified by data of two experimental generators. Computations show that for various applications advantages in weight and size can be expected compared with electromagnetic machines.

Published
2007

9. Theoretische und experimentelle Untersuchungen an elektrostatischen Wechselstromgeneratoren mit flüssigen polaren Dielektrika

Author

Igenbergs, Eduard (Prof. Dr.), Dittrich, Wolfgang (Prof. Dr. Dr. habil.), Wagner, Ulrich (Prof. Dr.), Albers, Roland, Igenbergs, Eduard (Prof. Dr.), Dittrich, Wolfgang (Prof. Dr. Dr. habil.), Wagner, Ulrich (Prof. Dr.), and Albers, Roland

Abstract

Die Arbeit beschreibt die Theorie, Konstruktion und die experimentelle Umsetzung elektrostatischer Hochspannungs-Wechselstromgeneratoren. Der mechanische Aufbau entspricht dem eines elektrostatischen Gleichstrom–Trommelgenerators. Zur Leistungssteigerung ist der Bereich zwischen Rotor und Stator mit einer polaren Flüssigkeit gefüllt. Die Frequenz des erzeugten Stromes ist gleich der Frequenz der Erregerspannung und unabhängig von der Drehzahl. Die Ergebnisse der Strom- und Spannungsberechnungen werden mit Hilfe der Meßdaten zweier Versuchsgeneratoren verifiziert. Im Vergleich zu elektromagnetischen Maschinen sind rechnerisch für verschiedene Anwendungsgebiete Gewichts- und Volumenvorteile zu erwarten., The paper presents the theorie, design and experimental implementation of electrostatic high voltage ac generators. The design is analogous to an electrostatic drum-type dc generator. To improve the power output, the space between rotor and stator is filled with a polar liquid. The frequency of the output current is equal to the frequency of the excitation voltage and independent of the rotor speed. The results of the calculation of the output voltage and current are verified by data of two experimental generators. Computations show that for various applications advantages in weight and size can be expected compared with electromagnetic machines.

Published
2007

10. Theoretische und experimentelle Untersuchungen an elektrostatischen Wechselstromgeneratoren mit flüssigen polaren Dielektrika

Author

Dittrich, Wolfgang (Prof. Dr. Dr. habil.), Igenbergs, Eduard (Prof. Dr.);Wagner, Ulrich (Prof. Dr.);Dittrich, Wolfgang (Prof. Dr. Dr. habil.), Albers, Roland, Dittrich, Wolfgang (Prof. Dr. Dr. habil.), Igenbergs, Eduard (Prof. Dr.);Wagner, Ulrich (Prof. Dr.);Dittrich, Wolfgang (Prof. Dr. Dr. habil.), and Albers, Roland

Abstract

Die Arbeit beschreibt die Theorie, Konstruktion und die experimentelle Umsetzung elektrostatischer Hochspannungs-Wechselstromgeneratoren. Der mechanische Aufbau entspricht dem eines elektrostatischen Gleichstrom–Trommelgenerators. Zur Leistungssteigerung ist der Bereich zwischen Rotor und Stator mit einer polaren Flüssigkeit gefüllt. Die Frequenz des erzeugten Stromes ist gleich der Frequenz der Erregerspannung und unabhängig von der Drehzahl. Die Ergebnisse der Strom- und Spannungsberechnungen werden mit Hilfe der Meßdaten zweier Versuchsgeneratoren verifiziert. Im Vergleich zu elektromagnetischen Maschinen sind rechnerisch für verschiedene Anwendungsgebiete Gewichts- und Volumenvorteile zu erwarten., The paper presents the theorie, design and experimental implementation of electrostatic high voltage ac generators. The design is analogous to an electrostatic drum-type dc generator. To improve the power output, the space between rotor and stator is filled with a polar liquid. The frequency of the output current is equal to the frequency of the excitation voltage and independent of the rotor speed. The results of the calculation of the output voltage and current are verified by data of two experimental generators. Computations show that for various applications advantages in weight and size can be expected compared with electromagnetic machines.

Published
2007

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