A5066835577- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Magnetic confinement fusion research
- Geomagnetism and Paleomagnetism Studies
- Astronomical Observations and Instrumentation
- Superconducting Materials and Applications
- Fusion materials and technologies
- Planetary Science and Exploration
- Solar Radiation and Photovoltaics
- Spacecraft Design and Technology
- Stellar, planetary, and galactic studies
- Radio Astronomy Observations and Technology
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Particle Detector Development and Performance
- Particle Accelerators and Free-Electron Lasers
- Nuclear reactor physics and engineering
- Gamma-ray bursts and supernovae
- Electromagnetic Compatibility and Measurements
- Earthquake Detection and Analysis
- Space Satellite Systems and Control
- Plasma Diagnostics and Applications
- Scientific Research and Discoveries
- GNSS positioning and interference
Centre National de la Recherche Scientifique
2013-2024
Université Paris Cité
2012-2024
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2015-2024
Université Paris Sciences et Lettres
2017-2024
Observatoire de Paris
2013-2024
Sorbonne Université
2012-2024
Université de Versailles Saint-Quentin-en-Yvelines
2008-2022
Délégation Paris 7
2012-2021
Sorbonne Paris Cité
2017-2021
Universidad de Alcalá
2020
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.
Solar Orbiter is the first space mission observing solar plasma both in situ and remotely, from a close distance, out of ecliptic. The ultimate goal to understand how Sun produces controls heliosphere, filling System driving planetary environments. With six remote-sensing four in-situ instrument suites, coordination planning operations are essential address following top-level science questions: (1) What drives wind where does coronal magnetic field originate? (2) How do transients drive...
Abstract On 2022 February 15–16, multiple spacecraft measured one of the most intense solar energetic particle (SEP) events observed so far in Solar Cycle 25. This study provides an overview interesting observations made by during this event. Parker Probe (PSP) and BepiColombo were close to each other at 0.34–0.37 au (a radial separation ∼0.03 au) as they impacted flank associated coronal mass ejection (CME). At about 100° retrograde direction 1.5 away from Sun, radiation detector on board...
Context. The Solar Orbiter spacecraft will be equipped with a wide range of remote-sensing (RS) and in situ (IS) instruments to record novel unprecedented measurements the solar atmosphere inner heliosphere. To take full advantage these new datasets, tools techniques must developed ease multi-instrument multi-spacecraft studies. In particular currently inaccessible low corona below two radii can only observed remotely. Furthermore used retrieve coronal plasma properties time three...
Abstract Radio waves are strongly scattered in the solar wind, so that their apparent sources seem to be considerably larger and shifted than actual ones. Since scattering depends on spectrum of density turbulence, a better understanding radio wave propagation provides indirect information relative fluctuations, <?CDATA $\epsilon =\langle \delta n\rangle /\langle $?> , at effective turbulence scale length. Here, we analyzed 30 type III bursts detected by Parker Solar Probe ( PSP ). For first...
Abstract We present a comprehensive study of type III radio bursts and their association with solar flares magnitude M1.0 larger, as observed by four widely separated spacecraft (Parker Solar Probe, Orbiter, STEREO-A, Wind). Our main focus is the introduction validation two methods for localizing using available multispacecraft data. The first method utilizes intensity fitting circular Gaussian distribution, while second based on time arrival bursts. demonstrate effectiveness these through...
Abstract Auroral Kilometric Radiation (AKR) is the strongest terrestrial radio emission, and emanates from same electron acceleration regions which particles precipitate into ionosphere, exciting aurorae other phenomena. As such, AKR a barometer for state of solar wind ‐ magnetosphere ionosphere coupling. anisotropically beamed in hollow cone source region generally found at nightside local times, meaning that single cannot be viewed all times magnetosphere. In data such as dynamic spectra,...
Abstract The results of a detailed assessment grid discretisation errors in SOLPS-ITER for ITER partially detached divertor solutions full metal wall configuration with neon seeding are presented. It is demonstrated that earlier discrepancies seen the comparison SOLPS4.3 can be minimised or even removed by employing 4x higher poloidal resolution. At such level refinement, both codes reproduce each other respect to operational space terms target peak heat flux vs neutral pressure. Higher...
Abstract The switch from beryllium (Be) to tungsten (W) first wall armour in the new ITER baseline [1,2] will impact limiter start-up phase due much higher radiated power associated with W impurity. To assess this impact, a large database of SOLPS-ITER simulations hydrogen (H) plasmas contact has been constituted, including transport all individual charge states up given cut-off. It shown that plasma-limiter system exhibits strong self-regulating properties dependence self-sputtering on...
The variability of the solar corona, including flares and coronal mass ejections, affects space environment Earth (heating ionization atmosphere, magnetic field disturbances, bombardment by high-energy particles). Electromagnetic emissions are first signatures a eruptive event which modifying electron density in ionosphere may affect airborne technology radio communications systems. In this paper, we present new method to detect automatically bursts using data from Nançay Decametre Array...
The goal of our study is to detect and characterize the electromagnetic waves that can modify electron distribution functions, with a special attention whistler waves. We analyse in details electric magnetic field fluctuations observed by Solar Orbiter spacecraft during its first orbit around Sun between 0.5 1 AU. Using data Search Coil Magnetometer antenna, both parts Radio Plasma Waves (RPW) instrumental suite, we frequencies above 3 Hz determine statistical their amplitudes, frequencies,...
Context. Solar Orbiter, launched in February 2020, started its cruise phase June coincidence with first perihelion at 0.51 au from the Sun. The situ instruments onboard, including Energetic Particle Detector (EPD), operate continuously during enabling observation of solar energetic particles. Aims. In measurements near-relativistic electron events observed July 2020 by EPD are analyzed and origins conditions for interplanetary transport these particles investigated. Methods. Electron...
Abstract We compare observations from the Juno/Waves radio experiment with simulations of «arcs» in time‐frequency plane resulting Io‐Jupiter interaction, performed ExPRES code. identify hemisphere origin observed arcs directly and confirm this identification through comparison Juno, Nançay, Wind observations. The occurrence shape are well modeled, at low latitudes their usual shapes as seen Earth, high longer, bowl‐shaped, for first time. Predicted emission is actually only when beaming...
We use multi-spacecraft observations of invididual type III radio bursts in order to calculate the directivity emission, be compared results ray-tracing simulations radio-wave propagation and probe plasma properties inner heliosphere. Ray-tracing with anisotropic scattering on density inhomogeneities are used study emissions. Simultaneous by four widely-separated spacecraft position sources. The shape pattern deduced for individual events is resulting from simulations. show that simultaneous...
The possibility to detect seismic activity on Venus by using the mechanical coupling of solid‐atmosphere system is investigated. First, atmospheric attenuation infrasonic waves produced quakes theoretically determined from a pure CO 2 model, demonstrating that frequencies below 0.1 Hz are amplified factor 10 000 above 120 km altitude. With simple quake an upper limit adiabatic temperature and density perturbations source estimated. Then, we demonstrate increase due high altitude acoustic...
Type III radio bursts are intense solar emissions generated by beams of energetic electrons injected into the interplanetary medium. They can be routinely observed S/Waves instruments on‐board STEREO (Solar Terrestrial Relation Observatory) spacecraft. We describe goniopolarimetric (GP) inversion a signal measured on non‐orthogonal antennas using Singular Value Decomposition (SVD) technique. This wave propagation analysis applied to spectral matrices built from measurements High Frequency...
Context. The Radio and Plasma Waves (RPW) instrument on board Solar Orbiter has been operating nearly continuously since the launch in February 2020. Time Domain Sampler (TDS) receiver of RPW is dedicated to waveform measurements plasma waves dust impact signatures an intermediate frequency range from 0.2 200 kHz. Aims. This article presents first data RPW-TDS discusses in-flight performance and, particular, on-board wave detection algorithm. We present TDS products its scientific operation....
Abstract We study 10 years (1995–2004 inclusive) of auroral kilometric radiation (AKR) radio emission data from the Wind spacecraft to examine link between AKR and terrestrial substorms. use substorm lists based on parameters including ground magnetometer signatures geosynchronous particle injections as a basis for superposed epoch analyses data. The results each list show similar, clear response power around onset. For nearly all event lists, average shows that begins increase 20 min prior...
We investigate the directivity of solar type III radio bursts at hectometer and kilometer wavelengths using data recorded simultaneously by Wind Ulysses spacecraft which are widely separated in heliocentric longitude latitude. From positions associated flares wind speed plasma density measured aboard spacecraft, we estimate location sources along approximately spiral magnetic field lines connected to flare sites. Using ratios flux densities from 1995 2005 same frequencies (940–80 kHz) on...
Coronal mass ejections (CMEs) are large-scale eruptions of magnetized plasma that may cause severe geomagnetic storms if Earth-directed. Here we report a rare instance with comprehensive in situ and remote sensing observa- tions CME combining white-light, radio, measurements from four different vantage points. For the first time, have successfully applied radio direction-finding technique to an interplanetary type II burst detected by two identical widely separated receivers. The derived...
Solar Orbiter’s in situ coordination working group met frequently during the development of mission with goal ensuring that its payload has necessary level to maximise science return. Here we present results work, namely how design each instruments (EPD, MAG, RPW, SWA) was guided by need for coordination, importance time synchronisation, and operations will be conducted a coordinated way. We discuss mechanisms which instrument sampling schemes are aligned such complementary measurements made...