Observational Challenges
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Cross-Scale An ESA mission under the Cosmic Visions 2015-25 Program (cross-scale) PowerPoint PPT Presentation


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Observational Challenges These processes: Are time-varying; Are fundamentally 3D; Have (at least) 3 spatial & temporal scales associated with: Electrons Ions Fluid behaviour which are non-linearly coupled; Collisionless → Kinetic; Complex plasma ↔ EM fields;

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Cross-Scale An ESA mission under the Cosmic Visions 2015-25 Program (cross-scale)

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Cross scale an esa mission under the cosmic visions 2015 25 program cross scale

  • Observational Challenges

  • These processes:

    • Are time-varying;

    • Are fundamentally 3D;

    • Have (at least) 3 spatial & temporal scales associated with:

      • Electrons

      • Ions

      • Fluid behaviour

  • which are non-linearly coupled;

  • Collisionless → Kinetic;

  • Complex plasma ↔ EM fields;

  • Largely inaccessible directly.

  • Cross-Scale will target science goals addressing the coupling between different scales.

    • Mission Motivation

    • There are 3 universal processes which control the dynamics of plasma systems:

      • Shocks

      • Magnetic Reconnection

      • Turbulence

    • These are responsible for:

      • Particle acceleration

      • Energy/momentum exchange

      • Transport

    • in space, astrophysical and laboratory plasmas

    How does the Solar System Work?

    • … and in Turbulence.

    • How does turbulence control plasma transport?

      • Energy cascade?

      • Anisotropies?

      • Coherent Structures?

    • … in Reconnection…

    • How does reconnection convert magnetic energy?

      • Initiation?

      • Magnetic topologies?

      • Particle acceleration?

    • Cross-Scale Coupling at Shocks…

    • How do shocks accelerate and heat particles?

      • Acceleration processes?

      • Energy partition?

      • Variabilty?

    Presented on behalf of the ESA Cross-Scale Science Study Team & Cross-Scale Community by Christopher J. Owen

    Cross-Scale

    An ESA mission under the Cosmic Visions 2015-25 Program

    (www.cross-scale.org)

    Mission Profile.

    • Recent Activities and Evolution

      • ESA Science Study Team defined SciRD and Payload Definition Document;

      • Strategy: 7 s/c minimum; + partners

      • Science objectives can be achieved with < 12 by shared corner and, if necessary , 2-scale coupling;

      • JAXA studies funded and reviewed autumn 2008;

      • NASA study funded @ $150k/yr × 2 yr;

      • Interest from Canada, Russia, China.

    • Orbit and Launch

    • Launch: ≤ 7 ESA s/c on Soyuz-Fregat;

    • Separate SCOPE launch for ≥ 2 JAXA s/c (launch capacity ≡ 3 moderately-equipped s/c + 600 kg – so could launch several third-party s/c);

    • Thus extendable by other agencies.

    • Requirements

    • Mission Design:

      • • Electron Scale: Extensive payload partially provided by JAXA SCOPE mission;

      • • Ion Scale: Targeted payload;

      • • Fluid Scale: Context payload;

      • • Focus: coupling between scales.

    10 km; 10 ms

    500 km; 1-5 s

    5000 km; 30s

    • Summary:

    • The Cross-Scale mission will address fundamental questions about how solar system, astrophysical and laboratory plasmas work by simultaneously measuring the coupling between electron, ion, and fluid scales;

    • The mission has widespread European and international support, is a mature concept within ESA and its member states, and is both feasible and affordable.


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