Quantifying the Sheath Impedance of the Electric Double Probe Instrument on the Van Allen Probes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F22%3A00557217" target="_blank" >RIV/68378289:_____/22:00557217 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/22:10456509
Result on the web
<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JA030369" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JA030369</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1029/2022JA030369" target="_blank" >10.1029/2022JA030369</a>
Alternative languages
Result language
angličtina
Original language name
Quantifying the Sheath Impedance of the Electric Double Probe Instrument on the Van Allen Probes
Original language description
Spherical double probe electric field sensors become electrically coupled to magnetospheric plasma during operation, leading to an instrument response that varies with the local plasma environment. Here, a method is developed for determining this variable coupling impedance for each measurement direction by using periods of favorable boom, wave, and magnetic field geometry. Comparing electric field complex amplitudes between 30 Hz and 10 kHz observed along each boom direction to those predicted from simultaneous magnetic field measurements and cold plasma theory allows for the amplitude and phase response of the instrument to be quantified over the full range of plasma densities encountered on-orbit. A sheath model is developed to describe how the sheath resistance, sheath capacitance, and relative effective length vary as a function of plasma density. An additional empirical correction is also included to describe the phase response along the spin-axis. The modeled sheath correction is subsequently tested for case studies of burst-mode data and statistical analyses of survey-mode data. It is demonstrated that the levels of agreement between observations and theoretical predictions based on Faraday's Law are substantially greater for the sheath corrected data than for uncorrected observations. Comparisons between observations with oppositely directed Poynting vector directions reveals that the sheath correction reconciles a bifurcated distribution in the uncorrected data to a single peak centered on agreement with Faraday's Law. A full sheath corrected EMFISIS L4 survey mode data set has been produced for final archive. Full details of the sheath correction are also provided for manual data correction.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/LTAUSA17070" target="_blank" >LTAUSA17070: Electromagnetic waves in planetary ionospheres and magnetospheres</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Geophysical Research-Space Physics
ISSN
2169-9380
e-ISSN
2169-9402
Volume of the periodical
127
Issue of the periodical within the volume
5
Country of publishing house
US - UNITED STATES
Number of pages
27
Pages from-to
e2022JA030369
UT code for WoS article
000796533300001
EID of the result in the Scopus database
2-s2.0-85130097363