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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:5
UID:UW-Physics-Event-4909
DTSTART:20181001T170500Z
DURATION:PT1H0M0S
DTSTAMP:20260315T143131Z
LAST-MODIFIED:20180928T140407Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Understanding Heavy Ion Impurity Transport in Tokamaks\, Plasm
 a Physics (Physics/ECE/NE 922) Seminar\, Dr. Emily Belli\, General Ato
 mics
DESCRIPTION:In a fusion reactor\, the transport of heavy impurities\, 
 such as tungsten from material surfaces\,
\ninto the high-temperature 
 core must be minimized since accumulation can lead to fuel dilution an
 d radiation losses\, ultimately degrading the energy confinement and f
 usion performance. Assessing the level of core accumulation requires s
 ophisticated transport models beyond those typically use for studying 
 the main ions and plasmas with low-Z impurities. In particular\, centr
 ifugal effects due to sonic rotation\, which arises in tokamaks from t
 orque due to neutral beam injection for plasma heating\, can lead to s
 ignificant modifications to the simulated transport of heavy impuritie
 s. The lack of sonic rotation effects in most theoretical models means
  that widely-used reduced models are inadequate for studying heavy imp
 urities and thus computationally-intensive advanced kinetic codes are 
 needed. In this work\, we use state-of-the art gyrokinetic (turbulent)
  and neoclassical (collision) codes to develop an understanding of the
  physical mechanisms driving the particle transport of tungsten in tok
 amaks and how tungsten accumulation can be avoided<br>
\n<br>
\nCospon
 sored by a generous grant from the Women in Science & Engineering Lead
 ership Institute ( WISELI)
URL:https://www.physics.wisc.edu/events/?id=4909
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