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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-8211
DTSTART:20230227T180000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T054152Z
LAST-MODIFIED:20230220T145254Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Advances in Stellarator Optimization\, Plasma Physics (Physics
 /ECE/NE 922) Seminar\, Sophia Henneberg\, Max Planck Institute for Pla
 sma Physics
DESCRIPTION:Recent improvements in stellarator optimization and new st
 ellarator designs will be presented. Stellarators possess three-dimens
 ional magnetic fields typically solely generated by the coils’ magne
 tic field. This reduces or even eliminates the need for generating tor
 oidal plasma currents\, which can lead to detrimental instabilities su
 ch as disruptions. However\, the three-dimensionality can in general i
 nvolve some drawbacks\, e.g.\, more complicated coils are typically ne
 eded compared to the axisymmetric case. Nonetheless\, with careful exp
 loitation of the large design space via optimization\, the apparent di
 sadvantages can be diminished.  In stellarator optimization studies\, 
 the boundary of the plasma is usually described by Fourier series that
  are not unique: several sets of Fourier coefficients describe approxi
 mately the same boundary shape. A simple method for eliminating this a
 rbitrariness is proposed and shown to work well in practice. Additiona
 lly\, we investigate the mathematical structure of the various inter-r
 elated calculations that underpin the integrated stellarator optimizat
 ion problem to better understand how the equilibrium calculation\, the
  coil calculation\, and the optimization calculation communicate with 
 each other. Furthermore\, new exciting stellarator designs with better
  confinement properties will be presented. Lastly\, I will describe on
 going and future work including ideas for a new university experiment 
 and ways forward for generating simpler coils.
URL:https://www.physics.wisc.edu/events/?id=8211
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