Dissertation defence (Space Physics): MSc Edin Husidic
MSc Edin Husidic defends the dissertation in Space Physics titled “Multi-scale modelling of energetic particle dynamics and radio signatures in coronal and heliospheric plasmas” at the University of Turku on 10 November 2025 at 13.00 (University of Turku, Quantum, Auditorium, Turku).
The audience can participate in the defence by remote access: https://utu.zoom.us/j/64627216271
Opponent: Dr Frederic Effenberger (Chair for Theoretical Physics IV, Ruhr-University Bochum, Germany)
Custos: Professor Rami Vainio (University of Turku)
Doctoral Dissertation at UTUPub: https://www.utupub.fi/handle/10024/194346
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Summary of the Doctoral Dissertation:
Space weather refers to the changing conditions in our solar system caused by the Sun’s magnetic activity.
Sudden releases of magnetic energy can produce intense bursts of radiation, known as solar flares, or expulsions of plasma, called coronal mass ejections (CME).
During these eruptions, solar energetic particles (SEPs) consisting of electrons, protons, and heavier ions can accelerate to high energies.
As they travel through interplanetary space, these particles can pose serious risks to astronauts, spacecraft, and satellites used for communication and navigation.
As society becomes increasingly reliant on space and ground-based technologies that are vulnerable to such harsh space weather, improving our understanding of these processes is essential for better forecasting and protection of humans and technology. Computer models based on physical principles offer a powerful approach.
This thesis advances these efforts by developing a new modelling framework for simulating SEP acceleration, transport, and radio emission in realistic representations of the corona and the inner heliosphere.
In the first stage, SEP dynamics in interplanetary space were improved by using an advanced heliospheric model capable of resolving shocks with much higher precision.
Second, the simulation domain was extended into the lower corona to capture key processes such as CME evolution, shock formation, and SEP acceleration.
Finally, a numerical code was integrated to compute radio emission from SEP electrons, which often provides early warning of CME and SEP events affecting near-Earth environment.
Applications of the model demonstrate major progress in modelling particle dynamics near the Sun and in space. The new framework enables realistic simulations of acceleration and transport at finely resolved shocks, improving the deion of shock-related effects.
The model shows great potential as a valuable tool for diagnosing CME magnetic fields near the Sun, which are otherwise extremely difficult to obtain from observations alone.
The integration of coronal and heliospheric models is a crucial step towards simulations of CME and SEP events from the solar surface to Earth’s orbit and beyond.
The audience can participate in the defence by remote access: https://utu.zoom.us/j/64627216271
Opponent: Dr Frederic Effenberger (Chair for Theoretical Physics IV, Ruhr-University Bochum, Germany)
Custos: Professor Rami Vainio (University of Turku)
Doctoral Dissertation at UTUPub: https://www.utupub.fi/handle/10024/194346
***
Summary of the Doctoral Dissertation:
Space weather refers to the changing conditions in our solar system caused by the Sun’s magnetic activity.
Sudden releases of magnetic energy can produce intense bursts of radiation, known as solar flares, or expulsions of plasma, called coronal mass ejections (CME).
During these eruptions, solar energetic particles (SEPs) consisting of electrons, protons, and heavier ions can accelerate to high energies.
As they travel through interplanetary space, these particles can pose serious risks to astronauts, spacecraft, and satellites used for communication and navigation.
As society becomes increasingly reliant on space and ground-based technologies that are vulnerable to such harsh space weather, improving our understanding of these processes is essential for better forecasting and protection of humans and technology. Computer models based on physical principles offer a powerful approach.
This thesis advances these efforts by developing a new modelling framework for simulating SEP acceleration, transport, and radio emission in realistic representations of the corona and the inner heliosphere.
In the first stage, SEP dynamics in interplanetary space were improved by using an advanced heliospheric model capable of resolving shocks with much higher precision.
Second, the simulation domain was extended into the lower corona to capture key processes such as CME evolution, shock formation, and SEP acceleration.
Finally, a numerical code was integrated to compute radio emission from SEP electrons, which often provides early warning of CME and SEP events affecting near-Earth environment.
Applications of the model demonstrate major progress in modelling particle dynamics near the Sun and in space. The new framework enables realistic simulations of acceleration and transport at finely resolved shocks, improving the deion of shock-related effects.
The model shows great potential as a valuable tool for diagnosing CME magnetic fields near the Sun, which are otherwise extremely difficult to obtain from observations alone.
The integration of coronal and heliospheric models is a crucial step towards simulations of CME and SEP events from the solar surface to Earth’s orbit and beyond.
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