PSP Bibliography





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Found 300 entries in the Bibliography.


Showing entries from 201 through 250


2018

Generation of Inverted Heliospheric Magnetic Flux by Coronal Loop Opening and Slow Solar Wind Release

In situ spacecraft observations provide much-needed constraints on theories of solar wind formation and release, particularly the highly variable slow solar wind, which dominates near-Earth space. Previous studies have shown an association between local inversions in the heliospheric magnetic field (HMF) and solar wind released from the vicinity of magnetically closed coronal structures. We here show that in situ properties of inverted HMF are consistent with the same hot coronal source regions as the slow solar wind. We ...

Owens, Mathew; Lockwood, Mike; Barnard, Luke; MacNeil, Allan;

Published by: The Astrophysical Journal      Published on: 11/2018

YEAR: 2018     DOI: 10.3847/2041-8213/aaee82

parker solar probe; Solar Probe Plus; Solar wind; Sun: activity; Sun: corona; Sun: magnetic fields

A New Inner Heliosphere Proton Parameter Dataset from the Helios Mission

In the near future, Parker Solar Probe and Solar Orbiter will provide the first comprehensive in-situ measurements of the solar wind in the inner heliosphere since the Helios mission in the 1970s. We describe a reprocessing of the original Helios ion distribution functions to provide reliable and reproducible data to characterise the proton core population of the solar wind in the inner heliosphere. A systematic fitting of bi-Maxwellian distribution functions was performed to the raw Helios ion distribution function data ...

Stansby, David; Salem, Chadi; Matteini, Lorenzo; Horbury, Timothy;

Published by: Solar Physics      Published on: 11/2018

YEAR: 2018     DOI: 10.1007/s11207-018-1377-3

Astrophysics - Solar and Stellar Astrophysics; Heliosphere; Inner heliosphere; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Solar wind protons

Solar corona heating by axion quark nugget dark matter

In this work we advocate for the idea that two seemingly unrelated 80-year-old mysteries\textemdashthe nature of dark matter and the high temperature of the million degree solar corona\textemdashmay have resolutions that lie within the same physical framework. The current paradigm is that the corona is heated by nanoflares, which were originally proposed as miniature versions of the observed solar flares. It was recently suggested that the nanoflares could be identified as annihilation events of the nuggets from the axion ...

Raza, Nayyer; Van Waerbeke, Ludovic; Zhitnitsky, Ariel;

Published by: Physical Review D      Published on: 11/2018

YEAR: 2018     DOI: 10.1103/PhysRevD.98.103527

Astrophysics - Cosmology and Nongalactic Astrophysics; Astrophysics - High Energy Astrophysical Phenomena; Astrophysics - Solar and Stellar Astrophysics; High Energy Physics - Phenomenology; parker solar probe; Solar Probe Plus

Spatial Expansion and Speeds of Type III Electron Beam Sources in the Solar Corona

A component of space weather, electron beams are routinely accelerated in the solar atmosphere and propagate through interplanetary space. Electron beams interact with Langmuir waves resulting in type III radio bursts. They expand along the trajectory and, using kinetic simulations, we explore the expansion as the electrons propagate away from the Sun. Specifically, we investigate the front, peak, and back of the electron beam in space from derived radio brightness temperatures of fundamental type III emission. The front ...

Reid, Hamish; Kontar, Eduard;

Published by: The Astrophysical Journal      Published on: 11/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aae5d4

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: flares; Sun: particle emission; Sun: radio radiation

Parametric Decay and the Origin of the Low-frequency Alfv\ enic Spectrum of the Solar Wind

The fast solar wind shows a wide spectrum of transverse magnetic and velocity field perturbations. These perturbations are strongly correlated in the sense of Alfv\ en waves propagating mostly outward, from the Sun to the interplanetary medium. They are likely to be fundamental to the acceleration and the heating of the solar wind. However, the precise origin of the broadband spectrum is unknown to date. Typical periods of chromospheric Alfv\ en waves are limited to a few minutes, and any longer period perturbations shoul ...

eville, Victor; Tenerani, Anna; Velli, Marco;

Published by: The Astrophysical Journal      Published on: 10/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aadb8f

instabilities; magnetohydrodynamics: MHD; methods: numerical; parker solar probe; Solar Probe Plus; Solar wind; waves

Simulated Encounters of the Parker Solar Probe with a Coronal-hole Jet

Solar coronal jets are small, transient, collimated ejections most easily observed in coronal holes (CHs). The upcoming Parker Solar Probe (PSP) mission provides the first opportunity to encounter CH jets in situ near the Sun and examine their internal structure and dynamics. Using projected mission orbital parameters, we have simulated PSP encounters with a fully three-dimensional magnetohydrodynamic (MHD) model of a CH jet. We find that three internal jet regions, featuring different wave modes and levels of compressibi ...

Roberts, Merrill; Uritsky, Vadim; DeVore, Richard; Karpen, Judith;

Published by: The Astrophysical Journal      Published on: 10/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aadb41

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind; Sun: activity; Sun: corona; Sun: heliosphere; Sun: magnetic fields

NASA launches Parker Solar Probe mission to \textquoterighttouch\textquoteright the Sun

NASA has launched a mission to study the Sun\textquoterights atmosphere and solar wind that will come far closer to our star than any other craft before.

Banks, Michael;

Published by: Physics World      Published on: 09/2018

YEAR: 2018     DOI: 10.1088/2058-7058/31/9/11

Parker Data Used; parker solar probe; Solar Probe Plus

Short, large-amplitude speed enhancements in the near-Sunfast solar wind

We report the presence of intermittent, short discrete enhancements in plasma speed in the near-Sun high-speed solar wind. Lasting tens of seconds to minutes in spacecraft measurements at 0.3 au, speeds inside these enhancements can reach 1000 km s-1, corresponding to a kinetic energy up to twice that of the bulk high-speed solar wind. These events, which occur around 5 per cent of the time, are Alfv\ enic in nature with large magnetic field deflections and are the same temperature as the surrounding plasma, in ...

Horbury, T; Matteini, L; Stansby, D;

Published by: Monthly Notices of the Royal Astronomical Society      Published on: 08/2018

YEAR: 2018     DOI: 10.1093/mnras/sty953

parker solar probe; Solar Probe Plus; Solar wind; Sun: corona

Death-defying NASA mission will make humanity\textquoterights closest approach to the Sun

The Parker Solar Probe will dive into the sizzling solar corona to explore its mysteries.

Witze, Alexandra;

Published by: Nature      Published on: 07/2018

YEAR: 2018     DOI: 10.1038/d41586-018-05741-6

Parker Data Used; parker solar probe; Solar Probe Plus

Electromagnetic Thermal Noise in Upper-Hybrid Frequency Range

The inner magnetosphere including the radiation belt and ring current environment is replete with high-frequency fluctuations with peak intensity occurring near upper-hybrid frequency and/or multiple harmonic electron cyclotron frequencies above and below the upper-hybrid frequency. Past and contemporary spacecraft missions, including the Van Allen Probes, were designed to detect the electric field spectrum only for these high-frequency fluctuations. Making use of the recently formulated generalized theory of electromagne ...

Yoon, Peter; Hwang, Junga; opez, Rodrigo; Kim, Sunjung; Lee, Jaejin;

Published by: Journal of Geophysical Research: Space Physics      Published on: 07/2018

YEAR: 2018     DOI: 10.1029/2018JA025459

electromagnetic; parker solar probe; Solar Probe Plus; thermal noise; upper hybrid

Opening a Window on ICME-driven GCR Modulation in the Inner Solar System

Interplanetary coronal mass ejections (ICMEs) often cause Forbush decreases (Fds) in the flux of galactic cosmic rays (GCRs). We investigate how a single ICME, launched from the Sun on 2014 February 12, affected GCR fluxes at Mercury, Earth, and Mars. We use GCR observations from MESSENGER at Mercury, ACE/LRO at the Earth/Moon, and MSL at Mars. We find that Fds are steeper and deeper closer to the Sun, and that the magnitude of the magnetic field in the ICME magnetic ejecta as well as the \textquotedblleftstrength\textquo ...

Winslow, Reka; Schwadron, Nathan; Lugaz, \; Guo, Jingnan; Joyce, Colin; Jordan, Andrew; Wilson, Jody; Spence, Harlan; Lawrence, David; Wimmer-Schweingruber, Robert; Mays, Leila;

Published by: The Astrophysical Journal      Published on: 04/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aab098

parker solar probe; Solar Probe Plus; Sun: coronal mass ejections: CMEs; Sun: evolution; Sun: heliosphere

Radial evolution of the solar wind in pure high-speed streams: HELIOS revised observations

Spacecraft observations have shown that the proton temperature in the solar wind falls off with radial distance more slowly than expected for an adiabatic prediction. Usually, previous studies have been focused on the evolution of the solar-wind plasma by using the bulk speed as an order parameter to discriminate different regimes. In contrast, here, we study the radial evolution of pure and homogeneous fast streams (i.e. well-defined streams of coronal-hole plasma that maintain their identity during several solar rotatio ...

Perrone, Denise; Stansby, D; Horbury, T; Matteini, L;

Published by: Monthly Notices of the Royal Astronomical Society      Published on: 03/2019

YEAR: 2018     DOI: 10.1093/mnras/sty3348

parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere

Investigating the Effect of IMF Path Length on Pitch-angle Scattering of Strahl within 1 au

Strahl is the strongly field-aligned, beam-like population of electrons in the solar wind. Strahl width is observed to increase with distance from the Sun, and hence strahl electrons must be subject to in-transit scattering effects. Different energy relations have been both observed and modeled for both strahl width and the width increase with radial distance. Thus, there is much debate regarding what mechanism(s) scatter strahl. In this study, we use a novel method to investigate strahl evolution within 1 au by estimatin ...

Graham, G.; Rae, I.; Owen, C.; Walsh, A.;

Published by: The Astrophysical Journal      Published on: 03/2018

YEAR: 2018     DOI: 10.3847/1538-4357/aaaf1b

parker solar probe; plasmas; scattering; Solar Probe Plus; Solar wind; Sun: heliosphere

Solar-wind predictions for the Parker Solar Probe Orbit

Context. The Parker Solar Probe (PSP; formerly Solar Probe Plus) mission will be humanitys first in situ exploration of the solar corona with closest perihelia at 9.86 solar radii (R) distance to the Sun. It will help answer hitherto unresolved questions on the heating of the solar corona and the source and acceleration of the solar wind and solar energetic particles. The scope of this study is to model the solar-wind environment for PSPs unprecedented distances in its prime mission phase during the years 20 ...

Venzmer, M.; Bothmer, V.;

Published by: Astronomy \& Astrophysics      Published on: 03/2018

YEAR: 2018     DOI: 10.1051/0004-6361/201731831

Astrophysics - Solar and Stellar Astrophysics; Parker Data Used; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere

Spectroscopic Measurements of the Ion Velocity Distribution at the Base of the Fast Solar Wind

In situ measurements of the fast solar wind reveal non-thermal distributions of electrons, protons, and minor ions extending from 0.3 au to the heliopause. The physical mechanisms responsible for these non-thermal properties and the location where these properties originate remain open questions. Here, we present spectroscopic evidence, from extreme ultraviolet spectroscopy, that the velocity distribution functions (VDFs) of minor ions are already non-Gaussian at the base of the fast solar wind in a coronal hole, at altit ...

Jeffrey, Natasha; Hahn, Michael; Savin, Daniel; Fletcher, Lyndsay;

Published by: The Astrophysical Journal      Published on: 03/2018

YEAR: 2018     DOI: 10.3847/2041-8213/aab08c

Astrophysics - Solar and Stellar Astrophysics; line: profiles; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: heliosphere; Sun: UV radiation; techniques: spectroscopic

Modeling a Single SEP Event from Multiple Vantage Points Using the iPATH Model

Using the recently extended 2D improved Particle Acceleration and Transport in the Heliosphere (iPATH) model, we model an example gradual solar energetic particle event as observed at multiple locations. Protons and ions that are energized via the diffusive shock acceleration mechanism are followed at a 2D coronal mass ejection-driven shock where the shock geometry varies across the shock front. The subsequent transport of energetic particles, including cross-field diffusion, is modeled by a Monte Carlo code that is based ...

Hu, Junxiang; Li, Gang; Fu, Shuai; Zank, Gary; Ao, Xianzhi;

Published by: The Astrophysical Journal      Published on: 02/2018

YEAR: 2018     DOI: 10.3847/2041-8213/aaabc1

parker solar probe; shock waves; Solar Probe Plus; Sun: coronal mass ejections: CMEs; Sun: heliosphere

Parametric instability, inverse cascade and the range of solar-wind turbulence

In this paper, weak-turbulence theory is used to investigate the nonlinear evolution of the parametric instability in three-dimensional low-β plasmas at wavelengths much greater than the ion inertial length under the assumption that slow magnetosonic waves are strongly damped. It is shown analytically that the parametric instability leads to an inverse cascade of Alfv\ en wave quanta, and several exact solutions to the wave kinetic equations are presented. The main results of the paper concern the parametric decay of Alf ...

Chandran, Benjamin;

Published by: Journal of Plasma Physics      Published on: 02/2018

YEAR: 2018     DOI: 10.1017/S0022377818000016

astrophysical plasmas; Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasma nonlinear phenomena; plasma waves; Solar Probe Plus

On the Performance of Multi-Instrument Solar Flare Observations During Solar Cycle 24

The current fleet of space-based solar observatories offers us a wealth of opportunities to study solar flares over a range of wavelengths. Significant advances in our understanding of flare physics often come from coordinated observations between multiple instruments. Consequently, considerable efforts have been, and continue to be, made to coordinate observations among instruments ( e.g. through the Max Millennium Program of Solar Flare Research). However, there has been no study to date that quantifies how many flares ...

Milligan, Ryan; Ireland, Jack;

Published by: Solar Physics      Published on: 02/2018

YEAR: 2018     DOI: 10.1007/s11207-017-1233-x

Astrophysics - Solar and Stellar Astrophysics; flares; Instrumentation and data management; parker solar probe; Solar Probe Plus

Diagnosing solar wind origins using in situ measurements in the inner heliosphere

Robustly identifying the solar sources of individual packets of solar wind measured in interplanetary space remains an open problem. We set out to see if this problem is easier to tackle using solar wind measurements closer to the Sun than 1 au, where the mixing and dynamical interaction of different solar wind streams is reduced. Using measurements from the Helios mission, we examined how the proton core temperature anisotropy and cross-helicity varied with distance. At 0.3 au there are two clearly separated anisotropic ...

Stansby, D; Horbury, T; Matteini, L;

Published by: Monthly Notices of the Royal Astronomical Society      Published on: 01/2019

YEAR: 2018     DOI: 10.1093/mnras/sty2814

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun:; Sun: heliosphere

Stray Light Analysis and Testing of the SoloHI (Solar Orbiter Heliospheric Imager) and WISPR (Wide Field Imager for Solar Probe) Heliospheric Imagers

The techniques for stray light analysis, optimization and testing are described for two space telescopes that observe the solar corona: the Solar Orbiter Heliospheric Imager (SoloHI) that will fly on the ESA Solar Orbiter (SolO), and the Wide Field Imager for Solar Probe (WISPR) that will fly on the NASA Parker Solar Probe (PSP) mission. Imaging the solar corona is challenging, because the corona is six orders of magnitude dimmer than the Sun surface at the limb, and the coronal brightness continues to decrease to ten orders ...

Thernisien, Arnaud; Howard, Russell; Korendyke, Clarence; Carter, Tim; Chua, Damien; Plunkett, Simon;

Published by:       Published on:

YEAR: 2018     DOI: 10.1117/12.2313645

Parker Data Used

2017

The Acceleration of High-energy Protons at Coronal Shocks: The Effect of Large-scale Streamer-like Magnetic Field Structures

Recent observations have shown that coronal shocks driven by coronal mass ejections can develop and accelerate particles within several solar radii in large solar energetic particle (SEP) events. Motivated by this, we present an SEP acceleration study that including the process in which a fast shock propagates through a streamer-like magnetic field with both closed and open field lines in the low corona region. The acceleration of protons is modeled by numerically solving the Parker transport equation with spatial diffusi ...

Kong, Xiangliang; Guo, Fan; Giacalone, Joe; Li, Hui; Chen, Yao;

Published by: The Astrophysical Journal      Published on: 12/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa97d7

acceleration of particles; Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics; shock waves; Solar Probe Plus; Sun: corona; Sun: coronal mass ejections: CMEs; Sun: magnetic fields; Sun: particle emission

A Zone of Preferential Ion Heating Extends Tens of Solar Radii from the Sun

The extreme temperatures and nonthermal nature of the solar corona and solar wind arise from an unidentified physical mechanism that preferentially heats certain ion species relative to others. Spectroscopic indicators of unequal temperatures commence within a fraction of a solar radius above the surface of the Sun, but the outer reach of this mechanism has yet to be determined. Here we present an empirical procedure for combining interplanetary solar wind measurements and a modeled energy equation including Coulomb relax ...

Kasper, J.; Klein, K.; Weber, T.; Maksimovic, M.; Zaslavsky, A.; Bale, S.; Maruca, B.; Stevens, M.; Case, A.;

Published by: The Astrophysical Journal      Published on: 11/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa84b1

acceleration of particles; Astrophysics - Solar and Stellar Astrophysics; magnetic fields; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; Sun: corona; turbulence

Capabilities and Performance of the High-Energy Energetic-Particles Instrument for the Parker Solar Probe Mission

NASA\textquoterights Parker Solar Probe (PSP) spacecraft (formerly Solar Probe Plus) is scheduled for launch in July 2018 with a planned heliocentric orbit that will carry it on a series of close passes by the Sun with perihelion distances that eventually will get below 10 solar radii. Among other in-situ and imaging sensors, the PSP payload includes the two-instrument \textquotedblleftIntegrated Science Investigation of the Sun\textquotedblright suite, which will make coordinated measurements of energetic ions and electr ...

Wiedenbeck, M.; Angold, N.; Birdwell, B.; Burnham, J.; Christian, E.; Cohen, C.; Cook, W.; Cummings, A.; Davis, A.; Dirks, G.; Do, D.; Everett, d.; Goodwin, P.; Hanley, J.; Hernandez, L.; Kecman, B.; Klemic, J.; Labrador, A.; Leske, R.; Lopez, S.; Link, J.; McComas, D.; Mewaldt, R.; Miyasaka, H.; Nahory, B.; Rankin, J.; Riggans, G.; Rodriguez, B.; Rusert, M.; Shuman, S.; Simms, K.; Stone, E.; von Rosenvinge, T.; Weidner, S.; White, M.;

Published by:       Published on: 10/2017

YEAR: 2017     DOI: 10.22323/1.301.0016

Parker Data Used

Future space missions: the inner region of the Solar system

The paper deals with an overview of space missions to explore the inner region of the Solar System, the nearest on time of their launch, namely, Probe Plus, Solar Orbiter, BepiColombo, EXOMars, and InSight. Each of them will study either the Sun or the planet of the Earth group. Their launches are planned for 2018-2020. We describe briefly predestination and technical equipment of spacecrafts, flight plan and scientific goal of these missions.

Vasylenko, A.A.;

Published by: Kosm\ \i\v cna nauka \ \i tehnolog\ \i\^a      Published on: 10/2017

YEAR: 2017     DOI: 10.15407/knit10.15407/knit2017.0310.15407/knit2017.03.073

Martian atmosphere; Martian surface; Mercury magnetic field; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind

Quasi-thermal noise spectroscopy: The art and the practice

Quasi-thermal noise spectroscopy is an efficient tool for measuring in situ macroscopic plasma properties in space, using a passive wave receiver at the ports of an electric antenna. This technique was pioneered on spinning spacecraft carrying very long dipole antennas in the interplanetary medium\textemdashlike ISEE-3 and Ulysses\textemdashwhose geometry approached a "theoretician\textquoterights dream." The technique has been extended to other instruments in various types of plasmas on board different spacecraft and wil ...

Meyer-Vernet, N.; Issautier, K.; Moncuquet, M.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 08/2017

YEAR: 2017     DOI: 10.1002/2017JA024449

electric antennas; magnetospheres; parker solar probe; plasma waves; radio receivers; Solar Probe Plus; Solar wind; velocity distributions

A Heuristic Approach to Remove the Background Intensity on White-light Solar Images. I. STEREO /HI-1 Heliospheric Images

White-light coronal and heliospheric imagers observe scattering of photospheric light from both dust particles (the F-Corona) and free electrons in the corona (the K-corona). The separation of the two coronae is thus vitally important to reveal the faint K-coronal structures (e.g., streamers, co-rotating interaction regions, coronal mass ejections, etc.). However, the separation of the two coronae is very difficult, so we are content in defining a background corona that contains the F- and as little K- as possible. For bo ...

Stenborg, Guillermo; Howard, Russell;

Published by: The Astrophysical Journal      Published on: 04/2017

YEAR: 2017     DOI: 10.3847/1538-4357/aa6a12

methods: data analysis; parker solar probe; Solar Probe Plus; Sun: corona; Sun: coronal mass ejections: CMEs; techniques: image processing

The solar probe plus radio frequency spectrometer: Measurement requirements, analog design, and digital signal processing

The Radio Frequency Spectrometer (RFS) is a two-channel digital receiver and spectrometer, which will make remote sensing observations of radio waves and in situ measurements of electrostatic and electromagnetic fluctuations in the solar wind. A part of the FIELDS suite for Solar Probe Plus (SPP), the RFS is optimized for measurements in the inner heliosphere, where solar radio bursts are more intense and the plasma frequency is higher compared to previous measurements at distances of 1 AU or greater. The inputs to the RF ...

Pulupa, M.; Bale, S.; Bonnell, J.; Bowen, T.; Carruth, N.; Goetz, K.; Gordon, D.; Harvey, P.; Maksimovic, M.; inez-Oliveros, J.; Moncuquet, M.; Saint-Hilaire, P.; Seitz, D.; Sundkvist, D.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 03/2017

YEAR: 2017     DOI: 10.1002/2016JA023345

electric field; FIELDS; magnetic field; Parker Data Used; parker solar probe; quasi-thermal noise; radio; Solar Probe Plus

Diagnosing collisionless energy transfer using field\textendashparticle correlations: Vlasov\textendashPoisson plasmas

Turbulence plays a key role in the conversion of the energy of large-scale fields and flows to plasma heat, impacting the macroscopic evolution of the heliosphere and other astrophysical plasma systems. Although we have long been able to make direct spacecraft measurements of all aspects of the electromagnetic field and plasma fluctuations in near-Earth space, our understanding of the physical mechanisms responsible for the damping of the turbulent fluctuations in heliospheric plasmas remains incomplete. Here we propose a ...

Howes, Gregory; Klein, Kristopher; Li, Tak;

Published by: Journal of Plasma Physics      Published on: 02/2017

YEAR: 2017     DOI: 10.1017/S0022377816001197

astrophysical plasmas; parker solar probe; plasma nonlinear phenomena; Solar Probe Plus; space plasma physics

Langmuir wave electric fields induced by electron beams in the heliosphere

Solar electron beams responsible for type III radio emission generate Langmuir waves as they propagate out from the Sun. The Langmuir waves are observed via in situ electric field measurements. These Langmuir waves are not smoothly distributed but occur in discrete clumps, commonly attributed to the turbulent nature of the solar wind electron density. Exactly how the density turbulence modulates the Langmuir wave electric fields is understood only qualitatively. Using weak turbulence simulations, we investigate how solar ...

Reid, Hamish; Kontar, Eduard;

Published by: Astronomy \& Astrophysics      Published on: 02/2017

YEAR: 2017     DOI: 10.1051/0004-6361/201629697

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; Solar Probe Plus; Solar wind; Sun: flares; Sun: heliosphere; Sun: magnetic fields; Sun: particle emission; Sun: radio radiation

The Mushroom: A half-sky energetic ion and electron detector

We present a time-of-flight mass spectrometer design for the measurement of ions in the 30 keV to 10 MeV range for protons (up to 40 MeV and 150 MeV for He and heavy ions, respectively) and 30 keV to 1 MeV range for electrons, covering half of the sky with 80 apertures. The instrument, known as the "Mushroom," owing to its shape, solves the field of view problem for magnetospheric and heliospheric missions that employ three-axis stabilized spacecraft, yet still require extended angular coverage; the Mushroom is also compa ...

Hill, M.; Mitchell, D.; Andrews, G.; Cooper, S.; Gurnee, R.; Hayes, J.; Layman, R.; McNutt, R.; Nelson, K.; Parker, C.; Schlemm, C.; Stokes, M.; Begley, S.; Boyle, M.; Burgum, J.; Do, D.; Dupont, A.; Gold, R.; Haggerty, D.; Hoffer, E.; Hutcheson, J.; Jaskulek, S.; Krimigis, S.; Liang, S.; London, S.; Noble, M.; Roelof, E.; Seifert, H.; Strohbehn, K.; Vandegriff, J.; Westlake, J.;

Published by: Journal of Geophysical Research: Space Physics      Published on: 02/2017

YEAR: 2017     DOI: 10.1002/2016JA022614

2 pi steradian; anisotropy; mass composition; microchannel plate; parker solar probe; Solar Probe Plus; solid-state detector; time of flight

2016

Editorial: Topical Volume on Developing the Solar Probe Plus Mission

The Solar Probe Plus mission is a remarkable and historic step in the exploration of humankind. We have visited all of the planets and a number of other smaller moons and bodies; we have explored the magnetospheres, not just of Earth but also of all the planets; and we have explored our heliosphere and even flown a spacecraft beyond its boundary and into interstellar space itself. However, only with the launch of Solar Probe Plus will we actually visit our own star\textemdashthe Sun\textemdashrepeatedly traveling to withi ...

Fox, Nicola; McComas, David;

Published by: Space Science Reviews      Published on: 12/2016

YEAR: 2016     DOI: 10.1007/s11214-016-0323-7

Parker Data Used; parker solar probe; Solar Probe Plus

The FIELDS Instrument Suite for Solar Probe Plus

NASA\textquoterights Solar Probe Plus (SPP) mission will make the first in situ measurements of the solar corona and the birthplace of the solar wind. The FIELDS instrument suite on SPP will make direct measurements of electric and magnetic fields, the properties of in situ plasma waves, electron density and temperature profiles, and interplanetary radio emissions, amongst other things. Here, we describe the scientific objectives targeted by the SPP/FIELDS instrument, the instrument design itself, and the instrument conce ...

Bale, S.; Goetz, K.; Harvey, P.; Turin, P.; Bonnell, J.; de Wit, T.; Ergun, R.; MacDowall, R.; Pulupa, M.; Andre, M.; Bolton, M.; Bougeret, J.-L.; Bowen, T.; Burgess, D.; Cattell, C.; Chandran, B.; Chaston, C.; Chen, C.; Choi, M.; Connerney, J.; Cranmer, S.; Diaz-Aguado, M.; Donakowski, W.; Drake, J.; Farrell, W.; Fergeau, P.; Fermin, J.; Fischer, J.; Fox, N.; Glaser, D.; Goldstein, M.; Gordon, D.; Hanson, E.; Harris, S.; Hayes, L.; Hinze, J.; Hollweg, J.; Horbury, T.; Howard, R.; Hoxie, V.; Jannet, G.; Karlsson, M.; Kasper, J.; Kellogg, P.; Kien, M.; Klimchuk, J.; Krasnoselskikh, V.; Krucker, S.; Lynch, J.; Maksimovic, M.; Malaspina, D.; Marker, S.; Martin, P.; Martinez-Oliveros, J.; McCauley, J.; McComas, D.; McDonald, T.; Meyer-Vernet, N.; Moncuquet, M.; Monson, S.; Mozer, F.; Murphy, S.; Odom, J.; Oliverson, R.; Olson, J.; Parker, E.; Pankow, D.; Phan, T.; Quataert, E.; Quinn, T.; Ruplin, S.; Salem, C.; Seitz, D.; Sheppard, D.; Siy, A.; Stevens, K.; Summers, D.; Szabo, A.; Timofeeva, M.; Vaivads, A.; Velli, M.; Yehle, A.; Werthimer, D.; Wygant, J.;

Published by: Space Science Reviews      Published on: 12/2016

YEAR: 2016     DOI: 10.1007/s11214-016-0244-5

Coronal heating; Parker Data Used; parker solar probe; Solar Probe Plus

The Solar Probe Plus Mission: Humanity\textquoterights First Visit to Our Star

Solar Probe Plus (SPP) will be the first spacecraft to fly into the low solar corona. SPP\textquoterights main science goal is to determine the structure and dynamics of the Sun\textquoterights coronal magnetic field, understand how the solar corona and wind are heated and accelerated, and determine what processes accelerate energetic particles. Understanding these fundamental phenomena has been a top-priority science goal for over five decades, dating back to the 1958 Simpson Committee Report. The scale and concept of su ...

Fox, N.; Velli, M.; Bale, S.; Decker, R.; Driesman, A.; Howard, R.; Kasper, J.; Kinnison, J.; Kusterer, M.; Lario, D.; Lockwood, M.; McComas, D.; Raouafi, N.; Szabo, A.;

Published by: Space Science Reviews      Published on: 12/2016

YEAR: 2016     DOI: 10.1007/s11214-015-0211-6

Corona; Heliophysics; NASA mission; Parker Data Used; parker solar probe; Solar Probe Plus; Solar wind; SPP

Emissivity of Boron Nitride and Metals for the Solar Probe Plus Mission

For application to the Solar Probe Plus mission (NASA), the behavior and the thermo-optical performance at very high temperatures (range 1100\textendash2200\ K) of candidate passive thermal control materials was assessed. On one hand, a pyrolytic boron nitride coating (130 μm\ 130 μm thick) was proved to be stable at high temperatures up to 2200\ K in vacuum, as well as proved, via total and spectral emissivity measurements at high temperatures, to be able to effectively turn an initially ...

Brodu, E.; Balat-Pichelin, M.;

Published by: Journal of Spacecraft and Rockets      Published on: 11/2016

YEAR: 2016     DOI: 10.2514/1.A33453

Parker Data Used; parker solar probe; Solar Probe Plus

Predictions for Dusty Mass Loss from Asteroids During Close Encounters with Solar Probe Plus

The Solar Probe Plus ( SPP) mission will explore the Sun\textquoterights corona and innermost solar wind starting in 2018. The spacecraft will also come close to a number of Mercury-crossing asteroids with perihelia less than 0.3 AU. At small heliocentric distances, these objects may begin to lose mass, thus becoming "active asteroids" with comet-like comae or tails. This paper assembles a database of 97 known Mercury-crossing asteroids that may be encountered by SPP, and it presents estimates of their time-dependent visi ...

Cranmer, Steven;

Published by: Earth, Moon, and Planets      Published on: 11/2016

YEAR: 2016     DOI: 10.1007/s11038-016-9490-5

Asteroids; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics; Comets; Inner heliosphere; Parker Data Used; parker solar probe; Solar Probe Plus

Slow Solar Wind: Observations and Modeling

While it is certain that the fast solar wind originates from coronal holes, where and how the slow solar wind (SSW) is formed remains an outstanding question in solar physics even in the post-SOHO era. The quest for the SSW origin forms a major objective for the planned future missions such as the Solar Orbiter and Solar Probe Plus. Nonetheless, results from spacecraft data, combined with theoretical modeling, have helped to investigate many aspects of the SSW. Fundamental physical properties of the coronal plasma have be ...

Abbo, L.; Ofman, L.; Antiochos, S.; Hansteen, V.; Harra, L.; Ko, Y.-K.; Lapenta, G.; Li, B.; Riley, P.; Strachan, L.; von Steiger, R.; Wang, Y.-M.;

Published by: Space Science Reviews      Published on: 11/2016

YEAR: 2016     DOI: 10.1007/s11214-016-0264-1

Corona; Coronal streamers; MHD and kinetic models; parker solar probe; Solar Probe Plus; Solar wind; Sun

MEASURING COLLISIONLESS DAMPING IN HELIOSPHERIC PLASMAS USING FIELD\textendashPARTICLE CORRELATIONS

An innovative field-particle correlation technique is proposed that uses single-point measurements of the electromagnetic fields and particle velocity distribution functions to investigate the net transfer of energy from fields to particles associated with the collisionless damping of turbulent fluctuations in weakly collisional plasmas, such as the solar wind. In addition to providing a direct estimate of the local rate of energy transfer between fields and particles, it provides vital new information about the distribut ...

Klein, K.; Howes, G.;

Published by: The Astrophysical Journal      Published on: 08/2016

YEAR: 2016     DOI: 10.3847/2041-8205/826/2/L30

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; Physics - Space Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

Constraining Solar Wind Heating Processes by Kinetic Properties of Heavy Ions

We analyze the heavy ion components (A \>4 amu ) in collisionally young solar wind plasma and show that there is a clear, stable dependence of temperature on mass, probably reflecting the conditions in the solar corona. We consider both linear and power law forms for the dependence and find that a simple linear fit of the form Ti/Tp=(1.35 \textpm.02 )mi/mp describes the observations twice as well as the equivalent best fit power law of the form Ti/Tp=(m< ...

Tracy, Patrick; Kasper, Justin; Raines, Jim; Shearer, Paul; Gilbert, Jason; Zurbuchen, Thomas;

Published by: Physical Review Letters      Published on: 06/2016

YEAR: 2016     DOI: 10.1103/PhysRevLett.116.255101

parker solar probe; Solar Probe Plus

The Digital Fields Board for the FIELDS instrument suite on the Solar Probe Plus mission: Analog and digital signal processing

The first in situ measurements of electric and magnetic fields in the near-Sun environment (\< 0.25 AU from the Sun) will be made by the FIELDS instrument suite on the Solar Probe Plus mission. The Digital Fields Board (DFB) is an electronics board within FIELDS that performs analog and digital signal processing, as well as digitization, for signals between DC and 60 kHz from five voltage sensors and four search coil magnetometer channels. These nine input signals are processed on the DFB into 26 analog data streams. A ...

Malaspina, David; Ergun, Robert; Bolton, Mary; Kien, Mark; Summers, David; Stevens, Ken; Yehle, Alan; Karlsson, Magnus; Hoxie, Vaughn; Bale, Stuart; Goetz, Keith;

Published by: Journal of Geophysical Research: Space Physics      Published on: 06/2016

YEAR: 2016     DOI: 10.1002/2016JA022344

electric and magnetic fields; instrumentation; Parker Data Used; parker solar probe; signal processing; solar probe; Solar Probe Plus; Solar wind

Ensemble Space-Time Correlation of Plasma Turbulence in the Solar Wind

Single point measurement turbulence cannot distinguish variations in space and time. We employ an ensemble of one- and two-point measurements in the solar wind to estimate the space-time correlation function in the comoving plasma frame. The method is illustrated using near Earth spacecraft observations, employing ACE, Geotail, IMP-8, and Wind data sets. New results include an evaluation of both correlation time and correlation length from a single method, and a new assessment of the accuracy of the familiar frozen-in flo ...

Matthaeus, H.; Weygand, M.; Dasso, S.;

Published by: Physical Review Letters      Published on: 06/2016

YEAR: 2016     DOI: 10.1103/PhysRevLett.116.245101

parker solar probe; Solar Probe Plus

SOLAR WIND COLLISIONAL AGE FROM A GLOBAL MAGNETOHYDRODYNAMICS SIMULATION

Simple estimates of the number of Coulomb collisions experienced by the interplanetary plasma to the point of observation, I.e., the \textquotedblleftcollisional age\textquotedblright, can be usefully employed in the study of non-thermal features of the solar wind. Usually these estimates are based on local plasma properties at the point of observation. Here we improve the method of estimation of the collisional age by employing solutions obtained from global three-dimensional magnetohydrodynamics simulations. This enable ...

Chhiber, R; Usmanov, AV; Matthaeus, WH; Goldstein, ML;

Published by: The Astrophysical Journal      Published on: 04/2016

YEAR: 2016     DOI: 10.3847/0004-637X/821/1/34

magnetohydrodynamics: MHD; methods: numerical; parker solar probe; plasmas; scattering; Solar Probe Plus; Solar wind; turbulence

EVOLUTION OF THE PROTON VELOCITY DISTRIBUTION DUE TO STOCHASTIC HEATING IN THE NEAR-SUN SOLAR WIND

We investigate how the proton distribution function evolves when the protons undergo stochastic heating by strong, low-frequency, Alfv\ en-wave turbulence under the assumption that β is small. We apply our analysis to protons undergoing stochastic heating in the supersonic fast solar wind and obtain proton distributions at heliocentric distances ranging from 4 to 30 solar radii. We find that the proton distribution develops non-Gaussian structure with a flat core and steep tail. For r\gt 5 RS, the proton distr ...

Klein, Kristopher; Chandran, Benjamin;

Published by: The Astrophysical Journal      Published on: 03/2016

YEAR: 2016     DOI: 10.3847/0004-637X/820/1/47

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Physics - Plasma Physics; plasmas; Solar Probe Plus; Solar wind; turbulence; waves

Pickup ion processes associated with spacecraft thrusters: Implications for solar probe plus

Chemical thrusters are widely used in spacecraft for attitude control and orbital manoeuvres. They create an exhaust plume of neutral gas which produces ions via photoionization and charge exchange. Measurements of local plasma properties will be affected by perturbations caused by the coupling between the newborn ions and the plasma. A model of neutral expansion has been used in conjunction with a fully three-dimensional hybrid code to study the evolution and ionization over time of the neutral cloud produced by the firi ...

Clemens, Adam; Burgess, David;

Published by: Physics of Plasmas      Published on: 03/2016

YEAR: 2016     DOI: 10.1063/1.4942938

Parker Data Used; parker solar probe; Solar Probe Plus

The Wide-Field Imager for Solar Probe Plus (WISPR)

Vourlidas, Angelos; Howard, Russell; Plunkett, Simon; Korendyke, Clarence; Thernisien, Arnaud; Wang, Dennis; Rich, Nathan; Carter, Michael; Chua, Damien; Socker, Dennis; Linton, Mark; Morrill, Jeff; Lynch, Sean; Thurn, Adam; Van Duyne, Peter; Hagood, Robert; Clifford, Greg; Grey, Phares; Velli, Marco; Liewer, Paulett; Hall, Jeffrey; DeJong, Eric; Mikic, Zoran; Rochus, Pierre; Mazy, Emanuel; Bothmer, Volker; Rodmann, Jens;

Published by: Space Science Reviews      Published on: 02/2015

YEAR: 2016     DOI: 10.1007/s11214-014-0114-y

Heliospheric imager; Imaging; Parker Data Used; Solar corona; Solar Probe Plus; Solar wind; Thomson scattering

The Solar Probe Plus Ground Based Network

Executive Summary. The role of the Solar Probe Plus (SPP) Ground-Based Network\ (SPP-GBN) is to optimize and enhance the science return of the SPP mission by\ providing unique data from the ground. The role of the GBN extends to planning and\ coordination, supported by appropriate infrastructure, to ensure that the right kinds of\ observations are acquired by the various facilities (see below), at the right times, and that\ the data are readily accessible to the community for a variety of uses. Th ...

Schwadron, N.; Bastian, T.; Leibacher, J.; Gary, D.; Pevtsov, A.; Velli, M.; Burkpile, J.; Raouafi, N.; Deforest, C.;

Published by:       Published on:

YEAR: 2016     DOI:

Parker Data Used; SPP White Papers

Modification of Velocity Power Spectra by Thermal Plasma Instrumentation

The upcoming Solar Probe Plus mission (Launch 2018) will launch with the newest and fastest space plasma instrumentation to date. The Solar Wind Electrons, Alphas, and Protons (SWEAP) instrument suite, which measures thermal plasma, will make measurements faster than the local gyro-frequency and proton plasma frequency. By developing an end-to-end computer model of a SWEAP instrument, this work explores the specific instrumental effects of thermal space plasma measurement, particularly in the reproduction of velocity power s ...

Whittlesey, P.; Zank, G.; Cirtain, J.; Wright, K.; Case, A.; Kasper, J.;

Published by:       Published on:

YEAR: 2016     DOI: 10.1088/1742-6596/767/1/012026

Parker Data Used

2015

Efficiency and behavior of textured high emissivity metallic coatings at high temperature

Three metallic coatings with textured surfaces, made of rhenium, tungsten and molybdenum, were studied in the frame of the Solar Probe Plus mission (NASA) as candidate materials. The role of these coatings is to dissipate a maximum of energy from a hot instrument facing the Sun, by the mean of their high total hemispherical emissivity. The total hemispherical emissivity of the three coatings was measured in the temperature range 1100-1900 K, as well as over time in order to study their high temperature stability. Various emi ...

Brodu, E.; Balat-Pichelin, M.; Sans, J.; Freeman, M.; Kasper, J.;

Published by: MATERIALS \& DESIGN      Published on: OCT 15

YEAR: 2015     DOI: 10.1016/j.matdes.2015.05.073

Parker Data Used

Evolution of the emissivity of tungsten at high temperature with and without proton bombardment

The Solar Probe Plus mission (NASA) will be the first mission to enter the solar corona. The spacecraft will orbit the Sun at 8.5 solar radii from the Sun s surface at closest approach. Some metallic parts of the two on-board instruments, SWEAP (a Faraday cup) and FIELDS (antennas), will directly face the Sun, while the rest of the payload will be protected by a heat shield. For application to these instruments, a candidate refractory material, tungsten, was studied, confronting conditions similar to the ones expected close ...

Brodu, E.; Balat-Pichelin, M.; Sans, J.; Kasper, J.;

Published by: ACTA MATERIALIA      Published on: FEB 1

YEAR: 2015     DOI: 10.1016/j.actamat.2014.10.050

Parker Data Used

3D ELECTRON DENSITY DISTRIBUTIONS IN THE SOLAR CORONA DURING SOLAR MINIMA: ASSESSMENT FOR MORE REALISTIC SOLAR WIND MODELING

Knowledge of the electron density distribution in the solar corona put constraints on the magnetic field configurations for coronal modeling and on initial conditions for solar wind modeling. We work with polarized SOHO/LASCO-C2 images from the last two recent minima of solar activity (1996-1997 and 2008-2010), devoid of coronal mass ejections. The goals are to derive the 4D electron density distributions in the corona by applying a newly developed time-dependent tomographic reconstruction method and to compare the result ...

de Patoul, Judith; Foullon, Claire; Riley, Pete;

Published by: The Astrophysical Journal      Published on: 11/2015

YEAR: 2015     DOI: 10.1088/0004-637X/814/1/68

Astrophysics - Solar and Stellar Astrophysics; parker solar probe; Solar Probe Plus; Solar wind; Sun: corona; Sun: evolution; Sun: fundamental parameters; Sun: rotation

ION-SCALE TURBULENCE IN THE INNER HELIOSPHERE: RADIAL DEPENDENCE

The evolution of the ion-scale plasma turbulence in the inner heliosphere is studied by associating the plasma parameters for hybrid-code turbulence simulations to the radial distance from the Sun via a Solar wind model based mapping procedure. Using a mapping based on a one-dimensional solar wind expansion model, the resulting ion-kinetic scale turbulence is related to the solar wind distance from the Sun. For this purpose the mapping is carried out for various values of ion beta that correspond to the heliocentric dista ...

sel, H.; Motschmann, U.; üchner, J.; Narita, Y.; Nariyuki, Y.;

Published by: The Astrophysical Journal      Published on: 10/2015

YEAR: 2015     DOI: 10.1088/0004-637X/812/2/175

parker solar probe; plasmas; Solar Probe Plus; Solar wind; turbulence; waves



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