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Title: Using AORSA to simulate helicon waves in DIII-D

Recent efforts have shown that helicon waves (fast waves at >20 omega(ci)) may be an attractive option for driving efficient off-axis current drive during non-inductive tokamak operation for DIII-D, ITER and DEMO. For DIII-D scenarios, the ray tracing code, GENRAY, has been extensively used to study helicon current drive efficiency and location as a function of many plasma parameters. The full wave code, AORSA, which is applicable to arbitrary Larmor radius and can resolve arbitrary ion cyclotron harmonic order, has been recently used to validate the ray tracing technique at these high cyclotron harmonics. If the SOL is ignored, it will be shown that the GENRAY and AORSA calculated current drive profiles are comparable for the envisioned high beta advanced scenarios for DIII-D, where there is high single pass absorption due to electron Landau damping and minimal ion damping. AORSA is also been used to estimate possible SOL effects on helicon current drive coupling and SOL absorption due to collisional and slow wave effects.
 [1] ;  [2] ;  [3] ;  [2] ;  [4] ;  [1] ;  [1] ;  [4] ;  [5] ;  [6]
  1. ORNL
  2. XCEL Engineering Inc., Oak Ridge
  3. Princeton Plasma Physics Laboratory (PPPL)
  4. Oak Ridge National Laboratory (ORNL)
  5. General Atomics, San Diego
  6. General Atomics
Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Resource Relation:
Journal Volume: 1689; Conference: Radio Frequency Power in Plasma, Lakewood, CA, USA, 20150427, 20150429
Research Org:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Org:
USDOE Office of Science (SC)
Country of Publication:
United States