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This content will become publicly available on January 10, 2019

Title: Integrated modeling of high βN steady state scenario on DIII-D

Theory-based integrated modeling validated against DIII-D experiments predicts that fully non-inductive DIII-D operation with β N > 4.5 is possible with certain upgrades. IPS-FASTRAN is a new iterative numerical procedure that integrates models of core transport, edge pedestal, equilibrium, stability, heating, and current drive self-consistently to find steady-state ( d/dt = 0) solutions and reproduces most features of DIII-D high β N discharges with a stationary current profile. Projecting forward to scenarios possible on DIII-D with future upgrades, the high q min > 2 scenario achieves stable operation at β N as high as 5 by using a very broad current density profile to improve the ideal-wall stabilization of low- n instabilities along with confinement enhancement from low magnetic shear. This modeling guides the necessary upgrades of the heating and current drive system to realize reactor-relevant high β N steady-state scenarios on DIII-D by simultaneous optimization of the current and pressure profiles.
Authors:
 [1] ;  [2] ;  [3] ;  [2] ; ORCiD logo [2] ;  [1] ; ORCiD logo [1] ; ORCiD logo [1] ;  [4] ;  [2] ;  [1] ;  [2]
  1. Oak Ridge National Lab., Oak Ridge, TN (United States)
  2. General Atomics, San Diego, CA (United States)
  3. Lawrence Livermore National Lab., Livermore, CA (United States)
  4. Seoul National Univ., Seoul (South Korea)
Publication Date:
Grant/Contract Number:
FC02-04ER54698; AC02-05CH11231; AC05-00OR22725; FG02- 95ER54309; FG02-95ER54698
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 25; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
General Atomics, San Diego, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1420378
Alternate Identifier(s):
OSTI ID: 1416464