M. Maksimović
A5045282309- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Earthquake Detection and Analysis
- Stellar, planetary, and galactic studies
- Solar Radiation and Photovoltaics
- Geophysics and Gravity Measurements
- Planetary Science and Exploration
- Spacecraft Design and Technology
- Atmospheric Ozone and Climate
- Gamma-ray bursts and supernovae
- Radio Astronomy Observations and Technology
- Space Science and Extraterrestrial Life
- Oil, Gas, and Environmental Issues
- Magnetic confinement fusion research
- Metamaterials and Metasurfaces Applications
- earthquake and tectonic studies
- Photonic Crystals and Applications
- Spacecraft and Cryogenic Technologies
- Photonic and Optical Devices
- Inertial Sensor and Navigation
- Global Energy and Sustainability Research
- Space Satellite Systems and Control
- History and Developments in Astronomy
Observatoire de Paris
2016-2025
Centre National de la Recherche Scientifique
2016-2025
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2016-2025
Sorbonne Université
2015-2024
Université Paris Cité
2015-2024
Université Paris Sciences et Lettres
2017-2024
Université de Versailles Saint-Quentin-en-Yvelines
2014-2024
Laboratoire de Physique des Plasmas
2009-2024
Sorbonne Paris Cité
2017-2024
Délégation Paris 7
2012-2023
The Solar Wind Electrons Alphas and Protons (SWEAP) Investigation on Probe Plus is a four sensor instrument suite that provides complete measurements of the electrons ionized helium hydrogen constitute bulk solar wind coronal plasma. SWEAP consists Cup (SPC) Analyzers (SPAN). SPC Faraday looks directly at Sun measures ion electron fluxes flow angles as function energy. SPAN an electrostatic analyzer (ESA) ram side SPP (SPAN-A) ESA anti-ram (SPAN-B). SPAN-A has time flight section enables it...
We fit Kappa functions to 16,000 velocity distribution measured in the solar wind by electron plasma instrument on board Ulysses. Statistically, distributions are observed have important high tails fast but closer a Maxwellian slow wind. also discuss how this result could support recent kinetic model of proposed Maksimovic, Pierrard and Lemaire [1997].
Observed electron distribution functions of the solar wind permanently exhibit three different components: a thermal core and suprathermal halo, which are always present at all pitch angles, sharply magnetic field aligned “strahl” is usually anti‐sunward moving. Whereas Coulomb collisions can explain relative isotropy population, origin halo more specifically its sunward directed part, remains unknown. In this study we radial evolution velocity in fast between 0.3 1.5 AU. For purpose combine...
The Solar Orbiter mission seeks to make connections between the physical processes occurring at Sun or in solar corona and nature of wind created by those which is subsequently observed spacecraft. also targets itself during its journey from source To meet specific science goals, will be equipped with both remote-sensing in-situ instruments unprecedented measurements atmosphere inner heliosphere. A crucial set provided Wind Analyser (SWA) suite instruments. This consists an Electron System...
The magnetometer instrument on the Solar Orbiter mission is designed to measure magnetic field local spacecraft continuously for entire duration. need characterise not only background but also its variations scales from far above well below proton gyroscale result in challenging requirements stability, precision, and noise, as operational limitations both other instruments. vibration thermal environment has led significant development of mechanical sensor design. overall design, performance,...
Aims. The Spectrometer Telescope for Imaging X-rays (STIX) on Solar Orbiter is a hard X-ray imaging spectrometer, which covers the energy range from 4 to 150 keV. STIX observes bremsstrahlung emissions solar flares and therefore provides diagnostics of hottest (⪆10 MK) flare plasma while quantifying location, spectrum, content flare-accelerated nonthermal electrons. Methods. To accomplish this, applies an indirect bigrid Fourier technique using set tungsten grids (at pitches 0.038 1 mm) in...
After decades of observations solar energetic particles from space-based observatories, relevant questions on particle injection, transport, and acceleration remain open. To address these scientific topics, accurate measurements the properties in inner heliosphere are needed. In this paper we describe Energetic Particle Detector (EPD), an instrument suite that is part payload aboard Solar Orbiter mission. will approach Sun as close 0.28 au provide extra-ecliptic beyond ∼30° heliographic...
During a passage through the Earth's dawn‐side outer radiation belt, whistler‐mode waves with amplitudes up to more than ∼240 mV/m were observed by STEREO S/WAVES instrument. These are an order of magnitude larger previously for whistlers in belt. Although peak frequency is similar whistler chorus, there distinct differences from addition amplitudes, including lack drift and oblique propagation large longitudinal electric field component. Simulations show that these amplitude can energize...
We have performed a statistical study of substantial amount solar wind electron velocity distribution functions (eVDFs). In our data set, we combine measurements acquired onboard three spacecrafts (Helios, Cluster II, and Ulysses) in the low ecliptic latitudes covering heliocentric distance from 0.3 up to 4 AU. this study, focus on nonthermal properties measured eVDFs both slow fast regimes. The aim present is (1) provide, for first time, an analytical model fit separately all components...
We have performed a statistical study of substantial amount electron data acquired in the solar wind to understand constraints on temperature anisotropy by plasma instabilities and Coulomb collisions. use large set measurements from three different spacecraft (Helios I, Cluster II, Ulysses) collected low ecliptic latitudes covering radial distance Sun 0.3 up 4 AU. estimate using fits measured velocity distribution functions situ. two population (core halo) analytical model properties both...
Abstract. The Spatio Temporal Analysis of Field Fluctuations (STAFF) experiment is one the five experiments, which constitute Cluster Wave Experiment Consortium (WEC). STAFF consists a three-axis search coil magnetometer to measure magnetic fluctuations at frequencies up 4 kHz, waveform unit (up either 10 Hz or 180 Hz) and Spectrum Analyser kHz). combines 3 components waves with two electric measured by Electric Fields Waves (EFW) calculate in real time 5 × Hermitian cross-spectral matrix 27...
We report an analysis of the proton temperature anisotropy evolution from 0.3 to 2.5 AU based on Helios and Ulysses observations. With increasing distance fast wind data show a path in parameter space ( β ∥ p , T ⊥ / ). The first part trajectory is well described by anticorrelation between parallel beta, while after 1 with changes result agreement constraints derived fire hose instability. slow more irregular behavior, general it not possible recover single path. However, small temporal...
The description of the turbulent spectrum magnetic fluctuations in solar wind kinetic range scales is not yet completely established. Here, we perform a statistical study 100 spectra measured by STAFF instrument on Cluster mission, which allows us to resolve from ion down fraction electron scales, i.e., ∼102 km ∼300 m. We show that for k⊥ρe ∈ [0.03, 3] (which corresponds approximately frequency spacecraft frame f [3, 300] Hz), all observed can be described general law E(k⊥)∝k−8/3⊥exp (−...
The STEREO/WAVES instrument has detected a very large number of intense voltage pulses. We suggest that these events are produced by impact ionisation nanoparticles striking the spacecraft at velocity order magnitude solar wind speed. Nanoparticles, which half-way between micron-sized dust and atomic ions, have such charge-to-mass ratio electric field induced magnetic accelerates them efficiently. Since impacts increases fast with speed, produce signals as high do much larger grains smaller...
Heat transport in the solar corona and wind is still a major unsolved astrophysical problem. Because of key role played by electrons, electron density temperature(s) are important prerequisites for understanding these plasmas. We present such situ measurements along two first encounters Parker Solar Probe (PSP), between 0.5 0.17 AU from Sun, revealing different states emerging near activity minimum. These preliminary results obtained simplified analysis plasma quasi-thermal noise (QTN)...
The Solar Wind Electrons Alphas and Protons experiment on the Parker Probe (PSP) mission measures three-dimensional electron velocity distribution function. We derive parameters of core, halo, strahl populations utilizing a combination fitting to model distributions numerical integration for $\sim 100,000$ measured near Sun first two PSP orbits, which reached heliocentric distances as small 0.17$ AU. As expected, core density temperature increase with decreasing distance, while ratio thermal...
The Radio and Plasma Waves (RPW) instrument on the ESA Solar Orbiter mission is described in this paper. This designed to measure in-situ magnetic electric fields waves from continuous a few hundreds of kHz. RPW will also observe solar radio emissions up 16 MHz. primary importance science requirements since it essential answer three four overarching objectives. In addition exchange on-board data with other instruments order process algorithms for interplanetary shocks type III langmuir detections.
We analyze dust impacts recorded by the S/WAVES radio instrument onboard two STEREO spacecraft near 1 A.U. during period 2007–2010. The impact of a particle on produces plasma cloud whose associated electric field can be detected on‐board antennas. For this study we use potential time series waveform sampler instrument. high resolution and long sampling times measurement enable us to deduce considerably more information than in previous studies based dynamic power spectra provided same or...