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Exploration of the Outer Heliosphere and the Local Interstellar Medium A Workshop Report (2004) / Chapter Skim
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3 The Next Logical Steps
Pages 24-28

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From page 24...
... Interstellar pickup ions and energetic particle acceleration processes at shocks and other interaction regions can be studied in detail within the inner heliosphere. Focusing especially on radial variation, composition, charge states, injection, and sources will yield new and valuable information, which can be extrapolated to the heliospheric boundary.
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From page 25...
... Progress in constraining the physical parameters of the LIC and the interaction with the heliosphere has been made recently through a coordinated analysis of interstellar He using three complementary techniques: direct neutral gas measurements, pickup ion measurements, and ultraviolet backscattering observations. A benchmark set of physical He parameters has been derived that yields consistent results for all three techniques (Gloeckler and Geiss, 2004; Lallement et al., 2004; Witte et al., 2004)
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From page 26...
... To measure both inner source and interstellar pickup ions, an elliptical orbit in the ecliptic plane into the side-wind direction relative to the interstellar gas flow would be an ideal compromise (see Figure 3.1) and would also cut through the gravitational focusing cone of He.
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From page 27...
... with different degrees of maturity, promise significant advances in imaging the heliospheric boundaries. Energetic Neutral Atom Imaging The inner heliosheath, between the termination shock and the heliopause, contains shocked solar wind plasma and pickup ions.
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From page 28...
... This measurement requires the development of a new generation of extremely sensitive diffuse EUV spectrometers with high spectral resolution. The experimental concepts have been formulated, and a feasibility study of the proposed instrumentation is being conducted.
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Key Terms

  • neutral gas
  • pickup ions
  • termination shock
  • inner heliosphere
  • solar wind

  • interstellar pickup
  • spectral resolution
  • pickup ion
  • gas flow
  • local interstellar

  • wind plasma
  • charge exchange
  • neutral atoms
  • inner source
  • energy range

  • physical parameters
  • outer heliosphere
  • heliospheric termination
  • interstellar medium
  • heliospheric enas

  • gas observations
  • magnetic field
  • wind interaction
  • geometric factor
  • fundamental coupling

  • extremely sensitive
  • backscattering observations
  • extremely timely
  • neutral distribution
  • interstellar neutral


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