Chorus Wave Properties From Van Allen Probes: Quantifying the Impact of the Sheath Corrected Electric Field

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378289%3A_____%2F23%3A00571060" target="_blank" >RIV/68378289:_____/23:00571060 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10475712

Výsledek na webu

<a href="https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL102922" target="_blank" >https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2023GL102922</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1029/2023GL102922" target="_blank" >10.1029/2023GL102922</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Chorus Wave Properties From Van Allen Probes: Quantifying the Impact of the Sheath Corrected Electric Field

Popis výsledku v původním jazyce

A sheath impedance model has recently been developed to describe how the variable coupling impedance between the Van Allen Probes instrumentation and the ambient plasma affects both the amplitude and phase of electric field wave measurements. Here, the impact of this sheath correction on measured chorus wave properties, including electric field wave power and the Poynting vector, is directly quantified. It is found that the sheath-corrected electric field wave power is typically between two and nine times larger than the uncorrected measurement, depending on wave frequency. The sheath correction typically increases the Poynting flux by a factor of similar to 2, and causes the polar angle of the Poynting vector to switch hemisphere from parallel to anti-parallel propagation in similar to 2% of cases. The uncorrected data exhibit significant deviations from the theoretically predicted relationship between the wave vector and the Poynting vector whereas this relationship is well-reproduced with the sheath-corrected observations.

Název v anglickém jazyce

Chorus Wave Properties From Van Allen Probes: Quantifying the Impact of the Sheath Corrected Electric Field

Popis výsledku anglicky

A sheath impedance model has recently been developed to describe how the variable coupling impedance between the Van Allen Probes instrumentation and the ambient plasma affects both the amplitude and phase of electric field wave measurements. Here, the impact of this sheath correction on measured chorus wave properties, including electric field wave power and the Poynting vector, is directly quantified. It is found that the sheath-corrected electric field wave power is typically between two and nine times larger than the uncorrected measurement, depending on wave frequency. The sheath correction typically increases the Poynting flux by a factor of similar to 2, and causes the polar angle of the Poynting vector to switch hemisphere from parallel to anti-parallel propagation in similar to 2% of cases. The uncorrected data exhibit significant deviations from the theoretically predicted relationship between the wave vector and the Poynting vector whereas this relationship is well-reproduced with the sheath-corrected observations.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10305 - Fluids and plasma physics (including surface physics)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Geophysical Research Letters

ISSN

0094-8276

e-ISSN

1944-8007

Svazek periodika

50

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

10

Strana od-do

e2023GL102922

Kód UT WoS článku

000959405100001

EID výsledku v databázi Scopus

2-s2.0-85153368215