TY - JOUR
T1 - Plasma Parameters From Quasi-Thermal Noise Observed by Parker Solar Probe
T2 - A New Model for the Antenna Response
AU - Martinović, Mihailo M.
AU - Ðorđević, Antonije R.
AU - Klein, Kristopher G.
AU - Maksimović, Milan
AU - Issautier, Karine
AU - Liu, Mingzhe
AU - Pulupa, Marc
AU - Bale, Stuart D.
AU - Halekas, Jasper S.
AU - McManus, Michael D.
N1 - Publisher Copyright:
© 2022. American Geophysical Union. All Rights Reserved.
PY - 2022/4
Y1 - 2022/4
N2 - Quasi-Thermal Noise (QTN) spectroscopy is a reliable diagnostic routinely used for measuring electron density and temperature in space plasmas. The observed spectrum depends on both antenna geometry and plasma kinetic properties. Parker solar probe (PSP), launched in 2018, is equipped with an antenna system consisting of two linear dipoles with a significant gap between the antenna arms. Such a configuration, not utilized on previous missions, cannot be completely described by current models of the antenna response function. In this work, we calculate the current distribution and the corresponding response function for the PSP antenna geometry, and use these results to generate synthetic QTN spectra. Applying this model to the Encounter 7 observations from PSP provides accurate estimations of electron density and temperature, which are in very good agreement with particle analyzer measurements.
AB - Quasi-Thermal Noise (QTN) spectroscopy is a reliable diagnostic routinely used for measuring electron density and temperature in space plasmas. The observed spectrum depends on both antenna geometry and plasma kinetic properties. Parker solar probe (PSP), launched in 2018, is equipped with an antenna system consisting of two linear dipoles with a significant gap between the antenna arms. Such a configuration, not utilized on previous missions, cannot be completely described by current models of the antenna response function. In this work, we calculate the current distribution and the corresponding response function for the PSP antenna geometry, and use these results to generate synthetic QTN spectra. Applying this model to the Encounter 7 observations from PSP provides accurate estimations of electron density and temperature, which are in very good agreement with particle analyzer measurements.
KW - antenna response
KW - quasi-thermal noise
KW - solar wind
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U2 - 10.1029/2021JA030182
DO - 10.1029/2021JA030182
M3 - Article
AN - SCOPUS:85129148060
SN - 2169-9380
VL - 127
JO - Journal of Geophysical Research: Space Physics
JF - Journal of Geophysical Research: Space Physics
IS - 4
M1 - e2021JA030182
ER -