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| Titel |
Fast plasma measurements in the solar wind: Lessons from Spektr-R and implications for THOR |
| VerfasserIn |
Lubomir Prech, Jana Safrankova, Zdenek Nemecek, Frantisek Nemec, Christopher H. K. Chen, Georgy N. Zastenker |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250123698
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| Publikation (Nr.) |
 EGU/EGU2016-2994.pdf |
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| Zusammenfassung |
| The paper discusses achievements of rapid measurements of solar wind parameters by the
BMSW instrument onboard the Spektr-R spacecraft. The main advantage of these
measurements is their speed that can reach 32 Hz. We present the examples of significant
results concentrated on (1) the IP shock ramp thickness that is observed to be comparable
with the ion gyroradius even for low-Mach number shocks; (2) wave trains connected with
the IP shock and an evolution of the ion velocity distribution within these wave trains; (3)
plasma turbulence around the ion spectral break, and (4) a study of variations of the He
abundance on short timescales (3–30 s) and their relations to in-transit turbulence. Based on
BMSW experience, we present further progress in development of a new variant of BMSW
that includes simultaneous measurements of a full energy distribution function (with 2-s
time resolution) and plasma moments with the time resolution of 32 Hz or better
under a Maxwellian approximation. A new configuration of the set of Faraday cups
allows us a perfect in-flight calibration, a special regime for helium abundance
determination and quick onboard information about the solar wind bulk speed. |
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