Talks

• Matter, energy, and the cosmic void – how empty is space really?
  31 August 2023, MS Queen Victoria, Cunard
• Extreme atmospheres – what is the weather like on other planets?
  29 August 2023, MS Queen Victoria, Cunard
• Today’s space-weather forecast: temperatures around 100,000 degrees and wind speeds of about 800 km/s
  26 August 2023, MS Queen Victoria, Cunard
• The Sun – What can we learn from the giant in our cosmic neighbourhood about stars across the Universe?
  24 August 2023, MS Queen Victoria, Cunard
• Non-equilibrium electron processes in the solar wind – kinetic physics and observations with Solar Orbiter
  18 July 2023, Seminar, Leibniz Institute for Astrophysics (AIP), Potsdam, Germany
• Small-scale reconnection and kinetic instabilities in turbulent space plasmas
  06 July 2023, 49th European Conference on Plasma Physics, European Physical Society, Bordeaux, France
• Matter, energy, and the cosmic void – how empty is space really?
  25 May 2023, MS Queen Mary 2, Cunard
• Extreme atmospheres – what is the weather like on other planets?
  24 May 2023, MS Queen Mary 2, Cunard
• Today’s space-weather forecast: temperatures around 100,000 degrees and wind speeds of about 800 km/s
  22 May 2023, MS Queen Mary 2, Cunard
• The giant in our cosmic neighbourhood – What can we learn from the Sun about the stars in our Universe?
  21 May 2023, MS Queen Mary 2, Cunard
• How do instabilities work in complex/inhomogeneous plasma backgrounds
  10 May 2023, CNR/RS Meeting “Multi-scale electrostatic energisation of plasmas: comparison of collective processes in laboratory and space”, Padova, Italy
• The multi-scale plasma physics of the solar wind: from electron scales to the size of the heliosphere
  08 May 2023, CNR/RS Meeting “Multi-scale electrostatic energisation of plasmas: comparison of collective processes in laboratory and space”, Padova, Italy
• Using non-thermal electron distributions to probe the inner heliosphere
  25 April 2023, EGU General Assembly, Vienna, Austria
• Non-Maxwellian electrons as messengers of the solar-wind expansion
  03 April 2023, Autumn MIST, University of Birmingham, Birmingham, UK
• The electron-deficit whistler instability: theory, simulations, and Solar Orbiter observations
  03 February 2023, SWA Team Meeting, Bordeaux, France
• Electron-Astrophysics – How the Smallest Scales in Space Power the Biggest Structures in the Universe
  30 January 2023, Physikalisches Kolloquium, Ruhr-Universität Bochum, Bochum, Germany
• The multi-scale physics of the solar wind: theoretical, numerical, and observational challenges
  19 January 2023, Space and Planetary Physics Seminar, Lancaster University, Lancaster, UK
• Exploring cosmic plasma physics with Parker Solar Probe and Solar Orbiter
  07 December 2022, Seminar, Jeremiah Horrocks Institute, University of Central Lancashire, Preston, UK
• Instabilities in plasmas with complex distribution functions – linear and quasilinear descriptions
  28 November 2022, ISSI Team “Ion Kinetic Instabilities in the Solar Wind in Light of Parker Solar Probe and Solar Orbiter Observations”, Bern, Switzerland
• Electron-driven instabilities in the solar wind
  15 November 2022, Arcetri 2022 Workshop on Plasma Astrophysics, Arcetri, Italy
• Today’s space-weather forecast: temperatures around 100,000 degrees and wind speeds of about 800 km/s
  19 August 2022, MS Queen Victoria, Cunard
• The giant in our cosmic neighbourhood – What can we learn from the Sun about the stars in our Universe?
  15 August 2022, MS Queen Victoria, Cunard
• Die Zukunft der Weltraumforschung – Chancen und Herausforderungen von internationalen Forschungskollaborationen
  05/06 August 2022, Salzburger Hochschulwochen, Salzburg, Austria
• HelioSwarm: A Multispacecraft Mission to Study Turbulence in Space Plasmas
  19 July 2022, 44th COSPAR Scientific Assembly, Athens, Greece
• Debye: a mission to study electron-astrophysics in the solar wind
  19 July 2022, 44th COSPAR Scientific Assembly, Athens, Greece
• Our understanding of the solar wind: in-situ observations with Parker Solar Probe and Solar Orbiter
  18 July 2022, 44th COSPAR Scientific Assembly, Athens, Greece
• Mass, momentum, energy, and angular-momentum budgets
  28 June 2022, SHINE Workshop, Honolulu, HI, USA
• The large-scale structure of the solar wind: flux conservation, radial scalings, Mach numbers, and critical distances
  23 May 2022, EGU General Assembly, Vienna, Austria
• Multi-scale processes in space plasmas: from electron scales to the size of the heliosphere
  22 April 2022, Applied Mathematics Seminar, University of St. Andrews, St. Andrews, UK, online
• The Plasma Analyser (PLA) instrument for Vigil – update and progress
  22 April 2022, RAS Specialist Discussion Meeting “Future Solar and Heliospheric Assets for Space Weather Prediction: Instruments, Modelling and Machine-Learning”, Royal Astronomical Society, London, UK, online
• Results from the Parker Solar Probe and Solar Orbiter missions
  12 April 2022, 48th Annual Plasma Physics Conference, Institute of Physics, Liverpool, UK
• The multi-scale nature of the solar wind: kinetic processes and turbulence
  02 February 2022, LASP Turbulence Meeting, University of Colorado, Boulder, USA, online
• In-situ science results from Solar Orbiter: examples and future prospects
  14 December 2021, AGU Fall Meeting 2021, New Orleans, LA, USA, online
• Flux conservation, radial scalings, Mach numbers, and critical distances in the solar wind: magnetohydrodynamics and Ulysses observations
  13 December 2021, AGU Fall Meeting 2021, New Orleans, LA, USA, online
• Local electron processes and their effects on the global evolution of the solar wind
  23 November 2021, ISSI Team “Heliospheric Energy Budget: From Kinetic Scales to Global Solar Wind Dynamics”, Bern, Switzerland
• The global structure of the solar wind: mass, momentum, energy, and angular-momentum fluxes from Solar Orbiter and other missions
  16 November 2021, Arcetri 2021 Workshop on Plasma Astrophysics, Arcetri, Italy
• The Solar Wind and ESA’s Solar Orbiter Mission
  06 November 2021, Young Elite Scientists Summit (YESS), 3rd World Science and Technology Development Forum (WSTDF), Beijing, China, online
• The solar wind from the Sun to the Earth: a multi-scale plasma
  02 November 2021, International Space Weather Initiative Workshop on Space Weather: Science and Applications, United Nations Office for Outer Space Affairs (UNOOSA) and Vikram Sarabhai Space Centre of the Indian Space Research Organization (ISRO), India, online
• A short tutorial of the solar wind
  15 September 2021, Astro and Solar Plasma Group, online
• An overview of the first in-situ results from Solar Orbiter
  25 August 2021, Joint Assembly IAGA-IASPEI 2021, online
• Using Solar Orbiter and other assets to explore the global structure of the solar wind: mass, momentum, energy, and angular-momentum fluxes
  22 July 2021, National Astronomy Meeting of the Royal Astronomical Society, online
• The solar wind angular-momentum flux observed during Solar Orbiter’s first orbit
  27 April 2021, EGU General Assembly, online
• The solar-wind angular-momentum flux observed during Solar Orbiter’s first orbit
  18 March 2021, Solar Orbiter In-situ Working Group “CMEs, CIRs, HCS and large-scale structure”, online
• Kinetics of solar-wind electrons: expansion, instabilities, and collisions
  30 November 2020, CFSA Seminar, Centre for Fusion, Space and Astrophysics, University of Warwick, online
• Kinetic physics of the electrons in the solar wind
  09 October 2020, Heliophysics Seminar, Princeton University, online
• Der Sonne ganz nah – die neuesten Ergebnisse von Solar Orbiter
  13 August 2020, Faszination Astronomie Online, Haus der Astronomie, Heidelberg, online
• Kinetic physics, collisions, and turbulence in the solar wind: a multi-scale perspective
  14 July 2020, MIST Online Seminar Series, online
• Die neuesten Entwicklungen in NASAs und ESAs Programm zur Erforschung des Sonnensystems
  25 May 2020, Rotary Club Heidelberg, online
• Kinetic theory and simulation of electron-strahl scattering in the solar wind
  06 May 2020, EGU General Assembly, online
• Die neuesten Entwicklungen in NASAs und ESAs Programm zur Erforschung des Sonnensystems
  29 April 2020, Rotaract Club Heidelberg, online
• Electron-astrophysics – ideas for future space missions
  27 April 2020, LASP Turbulence Meeting, University of Colorado, Boulder, online
• Solar Orbiter Science Briefing
  07 February 2020, ESA Social-media Event for the Launch of Solar Orbiter, European Space Operations Centre, Darmstadt, Germany
• Understanding and linking the solar wind: plasma kinetics with Solar Orbiter SWA
  14 January 2020, ISSI Team “Exploring The Solar Wind In Regions Closer Than Ever Observed Before”, Bern, Switzerland
• Self-induced scattering of the electron strahl in the inner heliosphere
  29 October 2019, 2019 Arcetri Workshop on Plasma Astrophysics, Arcetri, Italy
• A brief introduction to kinetic physics and turbulence in the solar wind
  26 August 2019, China University of Geosciences, Beijing, China
• The multi-scale behaviour of the solar wind: kinetic physics, collisions, and turbulence
  26 August 2019, National Space Science Center, Chinese Academy of Sciences, Beijing, China
• Electron-astrophysics – ideas for new space missions
  22 August 2019, Graduate Academic Conference on Turbulence and Magnetic Reconnection, Beijing, China
• The fluidisation of plasma turbulence – theory and observations
  21 August 2019, Peking University, Beijing, China
• Kinetic processes, turbulence, and the multi-scale evolution of the solar wind
  05 August 2019, SHINE Workshop, Boulder, CO, USA
• Multi-scale plasma processes in the solar wind
  03 July 2019, National Astronomy Meeting of the Royal Astronomical Society, Lancaster, UK
• The Debye mission: measuring electron-scale turbulence in the solar wind
  04 June 2019, Waves Côte d’Azur, Université de Côte d’Azur, Nice, France
• Debye: electron-astrophysics in the solar wind
  29 May 2019, Solar Wind Electron Workshop, ESAC, Villafranca del Castillo, Spain
• Measuring electron-scale turbulence with Debye
  11 April 2019, EGU General Assembly, Vienna, Austria
• Debye: design for an ESA F-Class mission to study electron heating in space and astrophysical plasma
  08 April 2019, EGU General Assembly, Vienna, Austria
• Large-scale and small-scale turbulence: particles and fields
  29 March 2019, SWA Team Meeting, Florence, Italy
• Studying large-scale and small-scale solar-wind turbulence with Solar Orbiter: particles and fields
  25 February 2019, ISEE Symposium “Recent progress in heliospheric physics by direct measurements of unexplored space plasmas”, Nagoya University, Nagoya, Japan
• The multi-scale nature of the solar wind
  14 December 2018, AGU Fall Meeting, Washington, DC, USA
• The solar wind: a multi-scale astrophysical plasma
  23 November 2018, School of Physics and Astronomy Seminar, Queen Mary University of London, London, UK
• Is the fast solar wind (almost) always unstable?
  22 October 2018, 2018 Arcetri Workshop on Plasma Astrophysics, Arcetri, Italy
• The Oblique Whistler-wave Instability Driven by the Electron Strahl
  25 September 2018, SWA Team Meeting, Prague, Czech Republic
• How unstable is the solar wind?
  26 July 2018, Fluids & Plasmas Seminar, University of Delaware, Newark, DE, USA
• Science with SWA and ALPS (The Arbitrary Linear Plasma Solver)
  16 May 2018, SWA Team Meeting, Frascati, Italy
• The Dynamics of Compressive Fluctuations in the Solar Wind: Fluid or Kinetic?
  26 April 2018, 8th Meeting of Isradynamics – “Dynamical Processes in Space Plasmas”, Ein Bokek, Israel
• The Arbitrary Linear Plasma Solver (ALPS): A New Tool for Kinetic Physics with Solar Orbiter and Parker Solar Probe
  11 April 2018, EGU General Assembly, Vienna, Austria
• Turbulence-driven Kinetic Instabilities and Their Effects on Particle Scattering in the Solar Wind
  04 April 2018, European Week of Astronomy and Space Science, Liverpool, UK
• Space plasma physics with ALPS: The Arbitrary Linear Plasma Solver
  27 March 2018, Spring MIST, University of Southampton, Southampton, UK
• Plasma-Astrophysics: The Connection Between Global Dynamics and Kinetic Plasma Physics
  15 February 2018, Astrophysics Group Seminar, Mullard Space Science Laboratory, University College London, Dorking, UK
• Cutting-edge Kinetic Physics with Parker Solar Probe and Solar Orbiter: The Arbitrary Linear Plasma Solver (ALPS)
  12 December 2017, AGU Fall Meeting, New Orleans, LA, USA
• Do we even need kinetic physics to describe the solar wind?
  22 November 2017, Solar System Group Meeting, Mullard Space Science Laboratory, University College London, Dorking, UK
• Using ALPS with Solar Orbiter to Understand Waves and Instabilities in the Solar Wind
  10 November 2017, RAS Specialist Discussion Meeting “Solar Orbiter: Synergy Between Theory and Observations”, Royal Astronomical Society, London, UK
• Polarisation Properties of Kinetic and MHD Slow Modes in the Solar Wind
  26 October 2017, 2017 Arcetri Workshop on Plasma Astrophysics, Arcetri, Italy
• Fluctuations in the Collisionless Solar Wind: MHD or Kinetic?
  19 October 2017, Plasma Seminar, University of Oxford, Oxford, UK
• The Polarization of Compressive Fluctuations in the Solar Wind: MHD, Kinetic Theory, and In-situ Observations
  24 August 2017, Parker Solar Probe Theory Telecon
• The Applicability of MHD to Describe a Collisionless Plasma Like the Solar Wind
  16 August 2017, Numerical Techniques in MHD Simulations Workshop, University of Cologne, Cologne, Germany
• Using WIND to Study Compressive Fluctuations in the Solar Wind
  20 July 2017, WIND SWG Telecon
• The Fluid-like Behavior of Compressive Fluctuations in the Collisionless Solar Wind
  19 June 2017, IPELS Workshop, San Diego, CA, USA
• Compressive Turbulence in the Solar Wind – Kinetic vs. Fluid Models
  07 June 2017, Astroplasmas Seminar, Princeton University, Princeton, NJ, USA
• Fluid and Kinetic Plasma Modes in the Collisionless Solar Wind
  01 May 2017, Space Physics Seminar, University of California at Berkeley, Berkeley, CA, USA
• How Fluid-like are the Compressive Fluctuations in the Solar Wind
  21 February 2017, Seminar, Imperial College, London, UK
• Compressive Turbulence and Its Effects on Kinetic Instabilities in the Solar Wind
  14 February 2017, Extra-Seminar, University of Bonn, Bonn, Germany
• ALPS: The Arbitrary Linear Plasma Solver
  17 December 2016, Wind Team Meeting, Berkeley, CA, USA
• Collisionless Isotropization of the Solar-Wind Protons by Compressive Fluctuations and Plasma Instabilities
  15 December 2016, AGU Fall Meeting, San Francisco, CA, USA
• Regulation of the Electron Strahl by Kinetic Instabilities in the Solar Wind
  11 December 2016, FIELDS Science Team Meeting, Berkeley, CA, USA
• Fluctuating-Moment Effects in the Solar Wind: A Kinetic Response to Compressive Plasma Turbulence
  09 November 2016, Space Science Center Seminar, University of New Hampshire, Durham, NH, USA
• Fluctuating-Moment Effects due to Compressive Plasma Turbulence in the Solar Wind
  12 September 2016, Imperial College, London, UK
• Compressive Fluctuations and their Effects on Particle Kinetics in the Solar Wind
  05 September 2016, Mullard Space Science Laboratory, University College London, Dorking, UK
• Isotropization of the Solar Wind through Plasma Instabilities Induced by Compressive Fluctuations
  07 April 2016, 15th Annual International Astrophysics Conference, Cape Coral, FL, USA
• Electron-Driven Instabilities and their Implications for Turbulence in the Solar Wind
  06 July 2015, SHINE Workshop, Stowe, VT, USA
• Alpha-Particle/Proton Differential Flow in the Solar Wind: Implications for Plasma Heating, Azimuthal Flow, and the Parker Spiral Magnetic Field
  17 December 2014, AGU Fall Meeting, San Francisco, CA, USA
• Alpha-Particle Energetics in the Solar Wind: Instabilities, the Rotational Force, and Particle Heating
  14 December 2014, FIELDS Science Team Meeting, Berkeley, CA, USA
• Deceleration of Alpha Particles in the Solar Wind by Instabilities and the Rotational Force
  29 October 2014, Space Science Center Seminar, University of New Hampshire, Durham, NH, USA
• Dissipation of Plasma Turbulence by Stochastic Heating
  23 June 2014, SHINE Workshop, Telluride, CO, USA
• Alpha Particles in the Solar Wind: Instabilities Driven by Beams and Temperature Anisotropies
  13 June 2014, Institute for Geophysics and Meteorology, University of Cologne, Germany
• Resonant Instabilities Driven by Anisotropic Alpha-Particle Beams in Collisionless Plasmas
  13 March 2014, 13th Annual International Astrophysics Conference, Myrtle Beach, SC, USA
• Kinetic Instabilities Driven by Alpha Particles and Their Contribution to Solar-Wind Heating
  10 December 2013, SWEAP Science Team Meeting, Berkeley, CA, USA
• Stochastic Heating at Beta of Order Unity
  08 December 2013, HTP Team Meeting, Berkeley, CA, USA
• Kinetic Instabilities Driven by Anisotropic Ion and Electron Beams in the Solar Wind
  29 October 2013, SPRG Seminar, University of California at Berkeley, Berkeley, CA, USA
• Preferential Ion Heating by Waves and Turbulence in the Solar Wind
  25 June 2013, SHINE Workshop, Buford, GA, USA
• Cascade on Kinetic Scales in Two-Dimensional Hybrid Simulations
  05 June 2013, Meeting on Solar Wind Turbulence, Kennebunkport, ME, USA
• Wave Generation by Alpha-Particle Driven Instabilities in the Solar Wind
  16 April 2013, Institut für Weltraumforschung, Österreichische Akademie der Wissenschaften, Graz, Austria
• Beam Instabilities Driven by Alpha Particles with Temperature Anisotropies in the Fast Solar Wind
  27 March 2013, First Solar Probe Plus Workshop, Pasadena, CA, USA
• Kinetic Instabilities Driven by Alpha Particles in the Solar Wind
  14 March 2013, The 42nd UK Fusion Theory Seminar, Culham, UK
• Resonant Instabilities and Scattering of the Electron Strahl
  04 December 2012, HTP Team Meeting, Berkeley, CA, USA
• A parallel-propagating Alfvénic ion-beam instability in magnetized high-beta space plasmas
  04 December 2012, HTP Team Meeting, Berkeley, CA, USA
• On the generation of oblique high-frequency waves by ion beams in the solar wind
  19 September 2012, Workshop “Turbulent cascade in the solar wind: anisotropy and dissipation”, Paris, France
• The anisotropic cascade of solar wind turbulence beyond MHD scales in two-dimensional hybrid simulations
  01 February 2012, 511. WE-Heraeus-Seminar “From the Heliosphere into the Sun — Sailing against the Wind”, Bad Honnef, Germany
• Über konvektierte Wellenstrukturen und spektralen Transfer in Weltraumplasmen — Anwendungen auf Sonnenkorona und Sonnenwind
  11 January 2012, Disputation, TU Braunschweig, Germany
• Hybrid simulations of the two-dimensional cascade of weak solar wind turbulence beyond MHD scales
  09 December 2011, AGU Fall Meeting, San Francisco, CA, USA
• Parametrischer Zerfall und kinetische Kaskade — spektraler Transfer in Weltraumplasmen
  27 October 2011, Oberseminar Theoretische Physik, TU Braunschweig
• Parametric decay and kinetic cascade — spectral transfer in space plasmas
  26 October 2011, Solar System Seminar, MPS Lindau, Germany
• Compressive wave structures on kinetic scales resulting from a two-dimensional turbulent cascade in the solar wind
  16. September 2011, Workshop “Cosmic Rays and the Heliospheric Plasma Environment”, Bochum, Germany
• Apparent temperature anisotropies due to wave activity in the solar wind
  19. April 2011, 478. WE-Heraeus-Seminar “Fusion and Astrophysical Plasmas”, Bad Honnef, Germany
• Schwach kompressive, hochfrequente Wellen im inhomogenen Multifluid-Plasma
  22. February 2011, DGG-Jahrestagung, Köln, Germany
• Compressive high-frequency waves riding on an Alfvén-cyclotron wave in a multi-fluid plasma
  26. January 2011, Oberseminar Theoretische Physik, TU Braunschweig, Germany
• Compressive high-frequency waves riding on an Alfvén-cyclotron wave in a multi-fluid plasma
  15. December 2010, Solar System Seminar, MPS Lindau, Germany
• Mikroturbulenz und Energiekaskade in Weltraumplasmen — Multifluid- und kinetische Betrachtungen
  03. June 2010, Oberseminar Theoretische Physik, TU Braunschweig, Germany
• Kinetics of non-Maxwellian distribution functions in the turbulent solar wind
  23. March 2010, Workshop “New perspectives on cosmic rays in the heliosphere”, Parys, South Africa
• Kinetik nicht-maxwellscher Verteilungsfunktionen des turbulenten Sonnenwindplasmas
  16. March 2010, DPG-Frühjahrstagung, Bonn, Germany
• Kinetics of solar wind turbulence — feedback on the proton distribution function
  27. January 2010, Solar System Seminar, MPS Lindau, Germany
• Kinetik der Abbremsung und Dissipation des Sonnenwindplasmas am heliosphärischen Schock
  02. April 2009, DPG-Frühjahrstagung, Greifswald, Germany
• IBEX: Theoretische Grundlagen
  20. January 2009, Extra-Seminar bei Hans Fahr, AIfA Bonn, Germany
• Solar wind proton reflection and induced injection to the ACR regime at the quasi-parallel termination shock
  11. November 2008, 2nd International Heliophysical Year Conference, ISSI Bern, Switzerland
• Ionen-Injektion in den Fermi-1-Prozeß
  06. May 2008, Extra-Seminar bei Hans Fahr, AIfA Bonn, Germany
• Kinetische Betrachtung des parallelen magnetohydrodynamischen Schocks
  05. March 2008, DPG-Frühjahrstagung, Freiburg, Germany
• Das Feldlinienkonzept: Sinn oder Unsinn
  10. July 2007, Extra-Seminar bei Hans Fahr, AIfA Bonn, Germany
• Beziehungen des Mondes zur Erde
  im “Bonner Sternenhimmel”, Bonn, Germany
• Temperaturmessung
  16. June 2006, Meteorologisches Instrumentenpraktikum, Universität Bonn, Germany
• Das Nilssonmodell
  11. January 2006, Seminar “Kernmodelle und ihre experimentelle Überprüfung”, Universität Bonn, Germany
• Microquasars as counterparts of unidentified EGRET sources
  Astrophysikalisches Seminar, Universität Bonn, Germany