Found 10 entries in the Bibliography.
Showing entries from 1 through 10
| 2020 |
|
Constraining Ion-Scale Heating and Spectral Energy Transfer in Observations of Plasma Turbulence We perform a statistical study of the turbulent power spectrum at inertial and kinetic scales observed during the first perihelion encounter of the Parker Solar Probe. We find that often there is an extremely steep scaling range of the power spectrum just above the ion-kinetic scales, similar to prior observations at 1 A.U., with a power-law index of around -4 . Based on our measurements, we demonstrate that either a significant (\>50 \%) fraction of the total turbulent energy flux is dissipated in this range of scales ... Bowen, Trevor; Mallet, Alfred; Bale, Stuart; Bonnell, J.; Case, Anthony; Chandran, Benjamin; Chasapis, Alexandros; Chen, Christopher; Duan, Die; de Wit, Thierry; Goetz, Keith; Halekas, Jasper; Harvey, Peter; Kasper, J.; Korreck, Kelly; Larson, Davin; Livi, Roberto; MacDowall, Robert; Malaspina, David; McManus, Michael; Pulupa, Marc; Stevens, Michael; Whittlesey, Phyllis; YEAR: 2020 DOI: 10.1103/PhysRevLett.125.025102 Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus |
|
We present heliospheric current sheet (HCS) and plasma sheet (HPS) observations during Parker Solar Probe\textquoterights (PSP) first orbit around the Sun. We focus on the eight intervals that display a true sector boundary (TSB; based on suprathermal electron pitch angle distributions) with one or several associated current sheets. The analysis shows that (1) the main density enhancements in the vicinity of the TSB and HCS are typically associated with electron strahl dropouts, implying magnetic disconnection from the Su ... Lavraud, B.; Fargette, N.; eville, V.; Szabo, A.; Huang, J.; Rouillard, A.; Viall, N.; Phan, T.; Kasper, J.; Bale, S.; Berthomier, M.; Bonnell, J.; Case, A.; de Wit, Dudok; Eastwood, J.; enot, V.; Goetz, K.; Griton, L.; Halekas, J.; Harvey, P.; Kieokaew, R.; Klein, K.; Korreck, K.; Kouloumvakos, A.; Larson, D.; Lavarra, M.; Livi, R.; Louarn, P.; MacDowall, R.; Maksimovic, M.; Malaspina, D.; Nieves-Chinchilla, T.; Pinto, R.; Poirier, N.; Pulupa, M.; Raouafi, N.; Stevens, M.; Toledo-Redondo, S.; Whittlesey, P.; YEAR: 2020 DOI: 10.3847/2041-8213/ab8d2d |
|
The Solar Probe ANalyzers\textemdashElectrons on the Parker Solar Probe Electrostatic analyzers of different designs have been used since the earliest days of the space age, beginning with the very earliest solar-wind measurements made by Mariner 2 en route to Venus in 1962. The Parker Solar Probe (PSP) mission, NASA\textquoterights first dedicated mission to study the innermost reaches of the heliosphere, makes its thermal plasma measurements using a suite of instruments called the Solar Wind Electrons, Alphas, and Protons (SWEAP) investigation. SWEAP\textquoterights electron PSP Analyzer (S ... Whittlesey, Phyllis; Larson, Davin; Kasper, Justin; Halekas, Jasper; Abatcha, Mamuda; Abiad, Robert; Berthomier, M.; Case, A.; Chen, Jianxin; Curtis, David; Dalton, Gregory; Klein, Kristopher; Korreck, Kelly; Livi, Roberto; Ludlam, Michael; Marckwordt, Mario; Rahmati, Ali; Robinson, Miles; Slagle, Amanda; Stevens, M.; Tiu, Chris; Verniero, J.; YEAR: 2020 DOI: 10.3847/1538-4365/ab7370 Astrophysics - Instrumentation and Methods for Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar coronal heating; Solar instruments; Solar Probe Plus; Solar wind; Space plasmas |
|
We discuss the solar wind electron temperatures Te as measured in the nascent solar wind by Parker Solar Probe during its first perihelion pass. The measurements have been obtained by fitting the high-frequency part of quasi-thermal noise spectra recorded by the Radio Frequency Spectrometer. In addition we compare these measurements with those obtained by the electrostatic analyzer discussed in Halekas et al. These first electron observations show an anticorrelation between Te and the wind bulk speed ... Maksimovic, M.; Bale, S.; c, Ber\v; Bonnell, J.; Case, A.; de Wit, Dudok; Goetz, K.; Halekas, J.; Harvey, P.; Issautier, K.; Kasper, J.; Korreck, K.; Jagarlamudi, Krishna; Lahmiti, N.; Larson, D.; Lecacheux, A.; Livi, R.; MacDowall, R.; Malaspina, D.; c, M.; Meyer-Vernet, N.; Moncuquet, M.; Pulupa, M.; Salem, C.; Stevens, M.; ak, \v; Velli, M.; Whittlesey, P.; YEAR: 2020 DOI: 10.3847/1538-4365/ab61fc |
|
Electrons in the Young Solar Wind: First Results from the Parker Solar Probe The Solar Wind Electrons Alphas and Protons experiment on the Parker Solar Probe (PSP) mission measures the three-dimensional electron velocity distribution function. We derive the parameters of the core, halo, and strahl populations utilizing a combination of fitting to model distributions and numerical integration for ̃100,000 electron distributions measured near the Sun on the first two PSP orbits, which reached heliocentric distances as small as ̃0.17 au. As expected, the electron core density and temperature increa ... Halekas, J.; Whittlesey, P.; Larson, D.; McGinnis, D.; Maksimovic, M.; Berthomier, M.; Kasper, J.; Case, A.; Korreck, K.; Stevens, M.; Klein, K.; Bale, S.; MacDowall, R.; Pulupa, M.; Malaspina, D.; Goetz, K.; Harvey, P.; YEAR: 2020 DOI: 10.3847/1538-4365/ab4cec Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus |
|
Plasma Waves near the Electron Cyclotron Frequency in the Near-Sun Solar Wind Data from the first two orbits of the Sun by Parker Solar Probe reveal that the solar wind sunward of 50 solar radii is replete with plasma waves and instabilities. One of the most prominent plasma wave power enhancements in this region appears near the electron cyclotron frequency (fce). Most of this wave power is concentrated in electric field fluctuations near 0.7 fce and fce, with strong harmonics of both frequencies extending above fce. At least two distinct, often concurre ... Malaspina, David; Halekas, Jasper; c, Laura; Larson, Davin; Whittlesey, Phyllis; Bale, Stuart; Bonnell, John; de Wit, Thierry; Ergun, Robert; Howes, Gregory; Goetz, Keith; Goodrich, Katherine; Harvey, Peter; MacDowall, Robert; Pulupa, Marc; Case, Anthony; Kasper, Justin; Korreck, Kelly; Livi, Roberto; Stevens, Michael; YEAR: 2020 DOI: 10.3847/1538-4365/ab4c3b Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus |
|
Relating Streamer Flows to Density and Magnetic Structures at the Parker Solar Probe The physical mechanisms that produce the slow solar wind are still highly debated. Parker Solar Probe\textquoterights (PSP\textquoterights) second solar encounter provided a new opportunity to relate in situ measurements of the nascent slow solar wind with white-light images of streamer flows. We exploit data taken by the Solar and Heliospheric Observatory, the Solar TErrestrial RElations Observatory (STEREO), and the Wide Imager on Solar Probe to reveal for the first time a close link between imaged streamer flows and th ... Rouillard, Alexis; Kouloumvakos, Athanasios; Vourlidas, Angelos; Kasper, Justin; Bale, Stuart; Raouafi, Nour-Edine; Lavraud, Benoit; Howard, Russell; Stenborg, Guillermo; Stevens, Michael; Poirier, Nicolas; Davies, Jackie; Hess, Phillip; Higginson, Aleida; Lavarra, Michael; Viall, Nicholeen; Korreck, Kelly; Pinto, Rui; Griton, Lea; eville, Victor; Louarn, Philippe; Wu, Yihong; Dalmasse, K\; enot, Vincent; Case, Anthony; Whittlesey, Phyllis; Larson, Davin; Halekas, Jasper; Livi, Roberto; Goetz, Keith; Harvey, Peter; MacDowall, Robert; Malaspina, D.; Pulupa, M.; Bonnell, J.; de Witt, Dudok; Penou, Emmanuel; YEAR: 2020 DOI: 10.3847/1538-4365/ab579a Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Solar Probe Plus |
| 2015 |
|
The Solar Wind Electrons Alphas and Protons (SWEAP) Investigation on Solar Probe Plus is a four sensor instrument suite that provides complete measurements of the electrons and ionized helium and hydrogen that constitute the bulk of solar wind and coronal plasma. SWEAP consists of the Solar Probe Cup (SPC) and the Solar Probe Analyzers (SPAN). SPC is a Faraday Cup that looks directly at the Sun and measures ion and electron fluxes and flow angles as a function of energy. SPAN consists of an ion and electron electrostatic ... Kasper, Justin; Abiad, Robert; Austin, Gerry; Balat-Pichelin, Marianne; Bale, Stuart; Belcher, John; Berg, Peter; Bergner, Henry; Berthomier, Matthieu; Bookbinder, Jay; Brodu, Etienne; Caldwell, David; Case, Anthony; Chandran, Benjamin; Cheimets, Peter; Cirtain, Jonathan; Cranmer, Steven; Curtis, David; Daigneau, Peter; Dalton, Greg; Dasgupta, Brahmananda; DeTomaso, David; Diaz-Aguado, Millan; Djordjevic, Blagoje; Donaskowski, Bill; Effinger, Michael; Florinski, Vladimir; Fox, Nichola; Freeman, Mark; Gallagher, Dennis; Gary, Peter; Gauron, Tom; Gates, Richard; Goldstein, Melvin; Golub, Leon; Gordon, Dorothy; Gurnee, Reid; Guth, Giora; Halekas, Jasper; Hatch, Ken; Heerikuisen, Jacob; Ho, George; Hu, Qiang; Johnson, Greg; Jordan, Steven; Korreck, Kelly; Larson, Davin; Lazarus, Alan; Li, Gang; Livi, Roberto; Ludlam, Michael; Maksimovic, Milan; McFadden, James; Marchant, William; Maruca, Bennet; McComas, David; Messina, Luciana; Mercer, Tony; Park, Sang; Peddie, Andrew; Pogorelov, Nikolai; Reinhart, Matthew; Richardson, John; Robinson, Miles; Rosen, Irene; Skoug, Ruth; Slagle, Amanda; Steinberg, John; Stevens, Michael; Szabo, Adam; Taylor, Ellen; Tiu, Chris; Turin, Paul; Velli, Marco; Webb, Gary; Whittlesey, Phyllis; Wright, Ken; Wu, S.; Zank, Gary; YEAR: 2015 DOI: 10.1007/s11214-015-0206-3 Acceleration; Corona; Heating; Parker Data Used; Solar Probe Plus; Solar wind plasma; SWEAP |
| 2014 |
|
Solar Probe Plus, scheduled to launch in 2018, is a NASA mission that will fly through the Sun\textquoterights atmosphere for the first time. It will employ a combination of in situ plasma measurements and remote sensing imaging to achieve the mission\textquoterights primary goal: to understand how the Sun\textquoterights corona is heated and how the solar wind is accelerated. The Solar Wind Electrons Alphas and Protons (SWEAP) instrument suite consists of a Faraday cup and three electrostatic analyzers. In order to accom ... Korreck, Kelly; Kasper, Justin; Case, Anthony; Daigneau, Peter; Bookbinder, Jay; Larson, Davin; Halekas, Jasper; Stevens, Michael; Ludlam, Micheal; Marchant, Will; YEAR: 2014 DOI: 10.1117/12.2057314 |
| 2013 |
|
AIP Conference ProceedingsDesigning a sun-pointing Faraday cup for solar probe plus The NASA Solar Probe Plus (SPP) mission will be the first spacecraft to pass through the sub-Alfv\ enic solar corona. The objectives of the mission are to trace the flow of energy that heats and accelerates the solar corona and solar wind, to determine the structure and dynamics of the plasma and magnetic fields at the sources of the solar wind, and to explore mechanisms that accelerate and transport energetic particles. The Solar Wind Electrons, Alphas, and Protons (SWEAP) Investigation instrument suite on SPP will measu ... Case, A.; Kasper, J.; Daigneau, P.; Caldwell, D.; Freeman, M.; Gauron, T.; Maruca, B.; Bookbinder, J.; Korreck, K.; Cirtain, J.; Effinger, M.; Halekas, J.; Larson, D.; Lazarus, A.; Stevens, M.; Taylor, E.; Wright, K.; YEAR: 2013 DOI: 10.1063/1.4811083 |
1
