др Стефан Мијин

17. јуна 2022.

У оквиру семинара Центра за неравнотежне процесе Института за физику у Београду, у четвртак, 23. јуна 2022. године у 14 часова у читаоници „др Драган Поповић“ путем Zoom платформе, др Стефан Мијин (Tokamak Science, Управа за атомску енергију Уједињеног Краљевства, Кулам научни центар), одржаће предавање:

Fluid and kinetic modelling of transport in the tokamak Scrape-Off Layer


As the JET tokamak nears the end of its lifetime and machines like JT-60SA and ITER slowly step onto the stage, we enter into the last planned generation of experimental machines before demonstration fusion plants, such as the EU’s DEMO and UK’s STEP. On that road there are still many unanswered physics questions, with a significant number of
them being part of the so-called exhaust problem. This problem stems from the transport of plasma out of the core and towards various material surfaces, where it interacts with neutral particles and impurities. The hot plasma carries immense amounts of heat to the surfaces, and these heat loads must be mitigated. To that end, the understanding of plasma and impurity transport in the boundary region of tokamaks is important for future reactor design and operations.

In this talk I will endeavour to give a broad overview of the exhaust problem, including theoretical and computational approaches to tackling various aspects of the problem. In that context I will present work done at UKAEA and Imperial College London on 1D fluid and kinetic modelling of electron transport in the tokamak Scrape-Off Layer (i.e. boundary region). I will show where kinetic effects can come into play and compare kinetic to fluid simulations both in steady state and during transient heating pulses. Finally, I will put the presented work into the broader context of ongoing and planned exhaust code development at UKAEA and discuss some important aspects of boundary plasma physics on
our minds.

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Meeting ID: 952 8120 0484
Passcode: 927407