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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
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SEQUENCE:0
UID:UW-Physics-Event-8599
DTSTART:20240205T180000Z
DTEND:20240205T191500Z
DTSTAMP:20260413T223251Z
LAST-MODIFIED:20240130T173942Z
LOCATION:1227 Engineering Hall
SUMMARY:Magnetohydrodynamics of tokamak disruptions\, Plasma Physics (
 Physics/ECE/NE 922) Seminar\, Prof. Carl Sovinec\, UW-Madison
DESCRIPTION:Full-scale operation of the ITER experiment will produce p
 lasma thermal energy and releasable magnetic energy on the order of hu
 ndreds of mega-Joules.  Unplanned disruptions to these discharges will
  be capable of causing significant material damage to plasma-facing co
 mponents and electrically conducting structures.  As such\, the suscep
 tibility to disruptions poses the greatest challenge for the tokamak a
 s a fusion reactor concept.  In this presentation\, operational limits
  and the typical sequence of dynamics during disruptions are reviewed\
 , as is the physics behind localized heat deposition\, electromechanic
 al forcing\, and runaway electron (RE) generation.  Extended-magnetohy
 drodynamic (MHD) numerical simulations provide insight into the physic
 s of tokamak disruptions.  Results computed with the NIMROD code (nimr
 odteam.org) describe profile relaxation and surface-force densities du
 ring asymmetric vertical displacement.  Other simulations show the imp
 ortance of MHD for mitigation with massive gas injection and shattered
  pellet injection.  The confinement of REs and their influence on MHD 
 is also considered.
URL:https://www.physics.wisc.edu/events/?id=8599
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