A5084566016- Solar and Space Plasma Dynamics
- Astro and Planetary Science
- Ionosphere and magnetosphere dynamics
- Spacecraft Design and Technology
- Atmospheric Ozone and Climate
- Stellar, planetary, and galactic studies
- Radiation Therapy and Dosimetry
- Planetary Science and Exploration
- Space exploration and regulation
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- solar cell performance optimization
- Solar Radiation and Photovoltaics
Kiel University
2019-2021
Max Planck Institute for Solar System Research
2020-2021
Fachhochschule Kiel
2021
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...
Context. On 2020 November 29, the first widespread solar energetic particle (SEP) event of cycle 25 was observed at four widely separated locations in inner (≲1 AU) heliosphere. Relativistic electrons as well protons with energies > 50 MeV were by Solar Orbiter (SolO), Parker Probe, Terrestrial Relations Observatory (STEREO)-A and multiple near-Earth spacecraft. The SEP associated an M4.4 class X-ray flare accompanied a coronal mass ejection extreme ultraviolet (EUV) wave type II radio...
Solar Orbiter strives to unveil how the Sun controls and shapes heliosphere fills it with energetic particle radiation. To this end, its Energetic Particle Detector (EPD) has now been in operation, providing excellent data, for just over a year. EPD measures suprathermal particles energy range from few keV up (near-) relativistic energies (few MeV electrons about 500 MeV/nuc ions). We present an overview of initial results first year operations we provide assessment issues limitations....
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...
The first orbit of Solar Orbiter provided comprehensive measurements six corotating interaction regions (CIRs) within 1 au. Five these CIRs were also observed by ACE at au, allowing for comparisons the suprathermal ion intensities and spectra different radial distances. Only subtle modulations 4 He spectral slopes are between ACE. Additionally, gradients 226−320 keV/nuc similar to that 1.53 MeV H reported Van Hollebeke et al. (1978, J. Geophys. Res., 83, A10). These observations provide a...
Aims. We present observations of the first coronal mass ejection (CME) observed by Solar Orbiter spacecraft on April 19, 2020 and associated Forbush decrease (FD) measured High Energy Telescope (HET). This CME is a multi-spacecraft event that was also seen near Earth following day. Methods. highlight capabilities HET for observing small short-term variations galactic cosmic ray count rate using its single detector counters. applied analytical ForbMod model to FD measurements reproduce at...
Context. Following a multi-year minimum of solar activity, energetic particle event on 2020 Nov. 29 was observed by multiple spacecraft covering wide range longitudes including ACE, the Solar Terrestrial Relations Observatory-A, and recently launched Parker Probe Orbiter. Aims. Multi-point observations event, combined with remote-sensing imaging flaring, shocks, coronal mass ejections allows for global picture to be synthesized, made available modeling community test, constrain, refine...
The Solar Orbiter flyby of Venus on 27 December 2020 allowed for an opportunity to measure the suprathermal energetic ions in Venusian system over a large range radial distances better understand acceleration processes within and provide characterization galactic cosmic rays near planet. Bursty ion enhancements (up ∼10 keV) were observed as far ∼50 R V downtail. These are likely related combination mechanisms regions strong turbulence, current sheet crossings, boundary layer with possible...
Context. The Solar Orbiter spacecraft cruised in the inner heliosphere during Feb. 2020 – Jan. 2021, moving between ∼0.5–1.0 au radial distance. Energetic Particle Detector suite operated continuously this period. Aims. Suprathermal Ion Spectrograph and High Energy Telescope observations made intervals transient intensity increases were used to determine low energy ion spectra composition quiet times. Methods. particle major components, including 3 He, measured over range ∼0.1–100 MeV...
Solar Orbiter is a joint ESA-NASA mission planed for launch in October 2018. The science payload includes remote-sensing and in-situ instrumentation designed with the primary goal of understanding how Sun creates controls heliosphere. spacecraft will follow an elliptical orbit around Sun, perihelion as close 0.28 AU. During late phase orbital plane reach inclinations above 30 degrees, allowing direct observations solar polar regions. Energetic Particle Detector (EPD) instrument suite...
Context. In mid-June 2020, the Solar Orbiter (SolO) mission reached its first perihelion at 0.51 au and started cruise phase, with most of in situ instruments operating continuously. Aims. We present particle measurements proton event observed after obtained by Energetic Particle Detector (EPD) suite on board SolO. The potential solar interplanetary (IP) sources these particles are investigated. Methods. Ion observations from ∼20 keV to ∼1 MeV combined available wind data Radio Plasma Waves...