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SUMMARY:Magnetic field line chaos and fusion power
DTSTART;VALUE=DATE-TIME:20221208T130000
DTEND;VALUE=DATE-TIME:20221208T143000
UID:96a0122b1804972611a235e36473646a04a0eeb88390591d4d986bb3
CATEGORIES:Conferences - Seminars
DESCRIPTION:Joaquim Loizu\nFusion power may be generated in steady-state b
y confining hot plasmas using only external magnetic fields. These can be
tailored in such a way that magnetic field lines foliate toroidally nested
surfaces that act as energy barriers for the plasma. This is the idea beh
ind the stellarator concept\, which has experienced a renaissance in recen
t years\, and has brought up new mathematical and physical questions. Of p
articular importance is the calculation of equilibrium pressure limits. In
deed\, at sufficiently high pressure a plasma generates currents that prom
ote the destruction of magnetic surfaces and the emergence magnetic chaos\
, thereby degrading plasma confinement. These phenomena can be modeled wit
h three-dimensional magneto-hydrodynamics\, which is a fantastic numerical
challenge. In this talk I will illustrate how we can predict and characte
rize the emergence of magnetic chaos at high plasma pressures in toroidall
y confined plasmas\, and how we can attempt at optimizing the external mag
netic field to increase the pressure limit.
LOCATION:GA 3 21 https://plan.epfl.ch/?room==GA%203%2021
STATUS:CONFIRMED
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