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

Abstract

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.

Authors:
 [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:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1263867
DOE Contract Number:
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 1689; Conference: Radio Frequency Power in Plasma, Lakewood, CA, USA, 20150427, 20150429
Country of Publication:
United States
Language:
English

Citation Formats

Lau, Cornwall H, Jaeger, E. F., Bertelli, Nicola, Berry, Lee Alan, Blazevski, Dan, Green, David L, Murakami, Masanori, Park, J. M., Pinsker, R. I., and Prater, R. Using AORSA to simulate helicon waves in DIII-D. United States: N. p., 2015. Web. doi:10.1063/1.4936534.
Lau, Cornwall H, Jaeger, E. F., Bertelli, Nicola, Berry, Lee Alan, Blazevski, Dan, Green, David L, Murakami, Masanori, Park, J. M., Pinsker, R. I., & Prater, R. Using AORSA to simulate helicon waves in DIII-D. United States. doi:10.1063/1.4936534.
Lau, Cornwall H, Jaeger, E. F., Bertelli, Nicola, Berry, Lee Alan, Blazevski, Dan, Green, David L, Murakami, Masanori, Park, J. M., Pinsker, R. I., and Prater, R. Thu . "Using AORSA to simulate helicon waves in DIII-D". United States. doi:10.1063/1.4936534.
@article{osti_1263867,
title = {Using AORSA to simulate helicon waves in DIII-D},
author = {Lau, Cornwall H and Jaeger, E. F. and Bertelli, Nicola and Berry, Lee Alan and Blazevski, Dan and Green, David L and Murakami, Masanori and Park, J. M. and Pinsker, R. I. and Prater, R.},
abstractNote = {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.},
doi = {10.1063/1.4936534},
journal = {},
number = ,
volume = 1689,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 2015},
month = {Thu Jan 01 00:00:00 EST 2015}
}

Conference:
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