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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-9144
DTSTART:20250307T211500Z
DTEND:20250307T215500Z
DTSTAMP:20260407T175825Z
LAST-MODIFIED:20250305T160339Z
LOCATION:106 Engineering Research Bldg
SUMMARY:"Status of design activity of QA-QI flexible stellarator at NI
 FS"\, HXS Group Meeting\, Prof. Hiroyuki Yamaguchi\, National Institut
 e for Fusion Studies
DESCRIPTION:As a candidate for the post-Large Helical Device at Nation
 al Institute for Fusion Science (NIFS)\, Japan\, our research group ha
 s been designing a new stellarator-type experiment device\, Variable S
 ymmetry Torus (VAST). To study the effect of particle motion on the co
 llective phenomena in plasma\, such as micro-turbulences\, magnetic fl
 exibility is emphasized in designing VAST: both quasi-axisymmetric (QA
 ) and quasi-isodynamic (QI)-like magnetic configurations can be realiz
 ed in a single device. With the basic design for modular and auxiliary
  coils being almost fixed\, the physics design of VAST has made substa
 ntial progress in the last year. Both QA and QI-like modes have been c
 onfirmed to have finite-beta MHD equilibria with good magnetic surface
 s. Gyrokinetic simulations have shown clear differences in ion-tempera
 ture-gradient driven turbulence and associated zonal flows between the
 se configurations. Recent attempts to predict plasma performances and 
 heating scenarios by integrated simulation will also be presented.
URL:https://www.physics.wisc.edu/events/?id=9144
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