@article{83995d12269841b8983e219cd70ab23e,
title = "Observation of Electron Conics by Juno: Implications for Radio Generation and Acceleration Processes",
abstract = "Using Juno plasma, electric and magnetic field observations (from JADE, Waves, and MAG instruments), we show that electron conic distributions are commonly observed in Jovian radio sources. The conics are characterized by maximum fluxes at oblique pitch angles, ~20°–30° from the B field, both in the upward and downward directions. They constitute an efficient source of free energy for the cyclotron maser instability. Growth rates of ~3 to 7 × 104 s−1 are obtained for hectometric waves, leading to amplification by e10 with propagation paths of 50–100 km. We show that stochastic acceleration due to interactions with a low-frequency electric field turbulence located a few 104 km above the ionosphere may form the observed conics. A possible source of turbulence could be inertial Alfv{\'e}n waves, suggesting a connection between the auroral acceleration and generation of coherent radio emissions.",
author = "P. Louarn and F. Allegrini and McComas, {D. J.} and Valek, {P. W.} and Kurth, {W. S.} and N. Andr{\'e} and F. Bagenal and S. Bolton and Ebert, {R. W.} and M. Imai and S. Levin and Szalay, {J. R.} and Wilson, {R. J.}",
note = "Funding Information: The French part of this work is supported by CNRS and CNES. The research at the University of Iowa was supported by NASA through contract 699041X with Southwest Research Institute. The JNO-E/J/SS-WAV-3-CDR-SRVFULL-V1.0, JNO-J/SW-JAD-3-CALIBRATED-V1.0, and JNO-J/SW-JAD-2-UNCALIBRATED-V1.0 data sets were obtained from the Planetary Data System (PDS) at http://pds.nasa.gov/. Funding Information: The French part of this work is supported by CNRS and CNES. The research at the University of Iowa was supported by NASA through contract 699041X with Southwest Research Institute. The JNO-E/J/SS-WAV-3-CDR- SRVFULL-V1.0, JNO-J/SW-JAD-3- CALIBRATED-V1.0, and JNO-J/SW-JAD-2- UNCALIBRATED-V1.0 data sets were obtained from the Planetary Data System (PDS) at http://pds.nasa.gov/. Publisher Copyright: {\textcopyright}2018. American Geophysical Union. All Rights Reserved.",
year = "2018",
month = sep,
day = "28",
doi = "10.1029/2018GL078973",
language = "English (US)",
volume = "45",
pages = "9408--9416",
journal = "Geophysical Research Letters",
issn = "0094-8276",
publisher = "American Geophysical Union",
number = "18",
}