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    On the interpretation of Langmuir probe data inside a spacecraft sheath

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    Authors
    Olson, J.
    Brenning, N.
    Wahlund, J.-E.
    Gunell, H.
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    Discipline
    Physical sciences
    Subject
    Ambient plasmas
    Applied potentials
    Cassini spacecraft
    Curve shape
    Debye length
    Dense plasma
    Key factors
    OML theory
    Parameter range
    Particle simulations
    Plasma parameter
    Potential barriers
    Potential minima
    Potential range
    Probe characteristics
    Probe position
    Probe size
    Sheath problem
    Space plasmas
    Transition regions
    Langmuir probes
    Magnetosphere
    Plasmas
    Spacecraft
    Probes
    Audience
    Scientific
    Date
    2010
    Metadata
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    Description
    If a Langmuir probe is located inside the sheath of a negatively charged spacecraft, there is a risk that the probe characteristic is modified compared to that of a free probe in the ambient plasma. We have studied this probe-in-spacecraft-sheath problem in the parameter range of a small Langmuir probe (with radius rLP⪡λD) using a modified version of the orbit motion limited (OML) probe theory. We find that the ambient electron contribution Ie(ULP) to the probe characteristic is suitably analyzed in terms of three regions of applied probe potential ULP. In region I, where the probe is negatively charged (i.e., ULPU1, there is first a transition region II in applied potential, U1
    Citation
    Olson, J.; Brenning, N.; Wahlund, J.-E.; Gunell, H. (2010). On the interpretation of Langmuir probe data inside a spacecraft sheath. , Review of Scientific Instruments, Vol. 81, Issue 10, 105106, DOI: 10.1063/1.3482155.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/3191
    doi: http://dx.doi.org/10.1063/1.3482155
    scopus: 2-s2.0-78149444107
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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