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UID:UW-Physics-Event-6673
DTSTART:20210913T170000Z
DURATION:PT1H0M0S
DTSTAMP:20260414T192200Z
LAST-MODIFIED:20210912T233312Z
LOCATION:2241 Chamberlin Hall
SUMMARY:Applying Fast-Ion Transport Control Methods and Predictive Mod
 eling in a Steady-State Tokamak Scenario\, Plasma Physics (Physics/ECE
 /NE 922) Seminar\, Cami Collins \, ORNL
DESCRIPTION:The viability of steady-state scenarios in ITER and future
  tokamak reactors relies on effective heating by energetic particles (
 EPs) to achieve high beta and bootstrap current. Experiments in the DI
 II-D tokamak show that a broadened fast-ion pressure profile and q-pro
 file manipulation enables better control of performance-degrading Alfv
 én Eigenmodes (AEs)\, improves EP confinement\, and allows access to 
 new regimes with 15% higher normalized plasma beta than previously ach
 ieved in steady state scenarios with negative central shear and qmin>2
 . To clarify the impact of EP transport on thermal profiles\, the TGLF
 -EP+Alpha critical-gradient model is used to calculate AE-induced EP t
 ransport. The model diffusion is used in TRANSP\, reproduces the measu
 red neutron rate within 5% in a wide range of evolving plasma conditio
 ns\, and enables better thermal profile predictions. This has exciting
  applications in integrated modeling for scenario development and reac
 tor scoping studies.
URL:https://www.physics.wisc.edu/events/?id=6673
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