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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-3773
DTSTART:20150928T170000Z
DTEND:20150928T180000Z
DTSTAMP:20260315T234001Z
LAST-MODIFIED:20150918T204306Z
LOCATION:2241 Physics Bldg 
SUMMARY:Linear and non-linear 3D plasma response for tokamak control\,
  Plasma Physics (Physics/ECE/NE 922) Seminar\, Carlos Paz Soldan\, Gen
 eral Atomics
DESCRIPTION:A recent upgrade of the DIII-D tokamak magnetic diagnostic
  is providing new insights to our understanding of the plasma response
  to external non-axisymmetric (3D) perturbations   This talk will high
 light two challenges for 3D control in tokamaks: 1) correction of long
  wavelength fields for error field (EF) control\, and 2) application o
 f short wavelength fields for edge-localized mode (ELM) control.  Corr
 elation of optimal control with 3D response measurements identifies th
 e underlying tokamak linear instabilities mediating EF and ELM control
  - and reveals their dissimilarity.  While linear physics governs whic
 h responses are important\, at their extreme both EF and ELM control f
 ields trigger similar non-linear bifurcations.  This highlights the po
 tential of driven reconnection (3D field penetration) to provide a com
 mon physical framework for both effects.
URL:https://www.physics.wisc.edu/events/?id=3773
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