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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-2591
DTSTART:20120208T180000Z
DURATION:PT1H0M0S
DTSTAMP:20260420T062711Z
LAST-MODIFIED:20120202T150622Z
LOCATION:2241 Chamberlin
SUMMARY:The evolution of the edge pedestal structure and turbulence du
 ring the edge localized mode (ELM) cycle on NSTX\, Plasma Physics (Phy
 sics/ECE/NE 922) Seminar\, Dr. Ahmed Diallo\, Princeton Plasma Physics
  Laboatory
DESCRIPTION:Fusion performance of the International Thermonuclear Expe
 riment Reactor (ITER) is predicted to be proportional to the square of
  the pedestal pressure height. The reference scenario for the ITER hig
 h confinement mode is projected to be in the Type I edge localized mod
 e (ELMy) regime where the maximum pedestal (edge) pressure is reached 
 leading to an enahcement of the fusion gain. It is also well known tha
 t ELMs pose a threat to the plasma facing components. Controlling ELMs
  is necessary and hence it is vital to understand the underlying physi
 cs. In recent years\, substantial progress has been made in pedestal r
 esearch on the National Spherical Torus Experiment (NSTX). Characteriz
 ations of the pedestal parameter dynamics and microturbulence in the p
 edestal region throughout the edge localized modes (ELM) cycles are pe
 rformed. More specifically\, this talk will be describing the current 
 understanding of the inter-ELM evolution\, approach to instability of 
 the edge pedestal\, and summarize ongoing work aimed at identifying th
 e microturbulence limiting the pedestal gradient. Finally\, transition
  to ELM-free operations enabled by lithiumcoated walls will be discuss
 ed as such regime provides larger pedestal pressure than in ELMy cases
 .
URL:https://www.physics.wisc.edu/events/?id=2591
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