Kinetic scale density fluctuations in the solar wind

C. H.K. Chen, G. G. Howes, J. W. Bonnell, F. S. Mozer, K. G. Klein, S. D. Bale

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Scopus citations

Abstract

We motivate the importance of studying kinetic scale turbulence for understanding the macroscopic properties of the heliosphere, such as the heating of the solar wind. We then discuss the technique by which kinetic scale density fluctuations can be measured using the spacecraft potential, including a calculation of the timescale for the spacecraft potential to react to the density changes. Finally, we compare the shape of the density spectrum at ion scales to theoretical predictions based on a cascade model for kinetic turbulence. We conclude that the shape of the spectrum, including the ion scale flattening, can be captured by the sum of passive density fluctuations at large scales and kinetic Alfvén wave turbulence at small scales.

Original languageEnglish (US)
Title of host publicationSolar Wind 2012 - Proceedings of the Thirteenth International Solar Wind Conference
Pages143-146
Number of pages4
DOIs
StatePublished - Aug 1 2013
Externally publishedYes
Event13th International Solar Wind Conference, Solar Wind 2012 - Big Island, HI, United States
Duration: Jun 17 2012Jun 22 2012

Publication series

NameAIP Conference Proceedings
Volume1539
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Conference

Conference13th International Solar Wind Conference, Solar Wind 2012
CountryUnited States
CityBig Island, HI
Period6/17/126/22/12

Keywords

  • heating
  • heliosphere
  • plasmas
  • solar wind
  • spacecraft charging
  • turbulence

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Chen, C. H. K., Howes, G. G., Bonnell, J. W., Mozer, F. S., Klein, K. G., & Bale, S. D. (2013). Kinetic scale density fluctuations in the solar wind. In Solar Wind 2012 - Proceedings of the Thirteenth International Solar Wind Conference (pp. 143-146). (AIP Conference Proceedings; Vol. 1539). https://doi.org/10.1063/1.4811008