skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: AORSA full wave calculations of helicon waves in DIII-D and ITER

Abstract

Helicon waves have been recently proposed as an off-axis current drive actuator for DIII-D, FNSF, and DEMO tokamaks. Previous ray tracing modeling using GENRAY predicts strong single pass absorption and current drive in the mid-radius region on DIII-D in high beta tokamak discharges. The full wave code AORSA, which is valid to all order of Larmor radius and can resolve arbitrary ion cyclotron harmonics, has been used to validate the ray tracing technique. If the scrape-off-layer (SOL) is ignored in the modeling, AORSA agrees with GENRAY in both the amplitude and location of driven current for DIII-D and ITER cases. These models also show that helicon current drive can possibly be an efficient current drive actuator for ITER. Previous GENRAY analysis did not include the SOL. AORSA has also been used to extend the simulations to include the SOL and to estimate possible power losses of helicon waves in the SOL. AORSA calculations show that another mode can propagate in the SOL and lead to significant (~10-20%) SOL losses at high SOL densities. Optimizing the SOL density profile can reduce these SOL losses to a few percent.

Authors:
ORCiD logo [1];  [2];  [3];  [2];  [1];  [1];  [1];  [4];  [4]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  2. XCEL Engineering, Inc., Oak Ridge, TN (United States)
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. General Atomics, San Diego, CA (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); General Atomics, San Diego, CA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Nuclear Energy (NE)
OSTI Identifier:
1432839
Alternate Identifier(s):
OSTI ID: 1432710; OSTI ID: 1435208
Grant/Contract Number:  
AC05-00OR22725; AC02-09CH11466; FC02-04ER54698
Resource Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 58; Journal Issue: 6; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; helicon; current drive; AORSA; electromagnetic simulation; DIII-D; ITER; tokamak

Citation Formats

Lau, C., Jaeger, E. F., Bertelli, N., Berry, L. A., Green, D. L., Murakami, M., Park, J. M., Pinsker, R. I., and Prater, R. AORSA full wave calculations of helicon waves in DIII-D and ITER. United States: N. p., 2018. Web. https://doi.org/10.1088/1741-4326/aab96d.
Lau, C., Jaeger, E. F., Bertelli, N., Berry, L. A., Green, D. L., Murakami, M., Park, J. M., Pinsker, R. I., & Prater, R. AORSA full wave calculations of helicon waves in DIII-D and ITER. United States. https://doi.org/10.1088/1741-4326/aab96d
Lau, C., Jaeger, E. F., Bertelli, N., Berry, L. A., Green, D. L., Murakami, M., Park, J. M., Pinsker, R. I., and Prater, R. Wed . "AORSA full wave calculations of helicon waves in DIII-D and ITER". United States. https://doi.org/10.1088/1741-4326/aab96d. https://www.osti.gov/servlets/purl/1432839.
@article{osti_1432839,
title = {AORSA full wave calculations of helicon waves in DIII-D and ITER},
author = {Lau, C. and Jaeger, E. F. and Bertelli, N. and Berry, L. A. and Green, D. L. and Murakami, M. and Park, J. M. and Pinsker, R. I. and Prater, R.},
abstractNote = {Helicon waves have been recently proposed as an off-axis current drive actuator for DIII-D, FNSF, and DEMO tokamaks. Previous ray tracing modeling using GENRAY predicts strong single pass absorption and current drive in the mid-radius region on DIII-D in high beta tokamak discharges. The full wave code AORSA, which is valid to all order of Larmor radius and can resolve arbitrary ion cyclotron harmonics, has been used to validate the ray tracing technique. If the scrape-off-layer (SOL) is ignored in the modeling, AORSA agrees with GENRAY in both the amplitude and location of driven current for DIII-D and ITER cases. These models also show that helicon current drive can possibly be an efficient current drive actuator for ITER. Previous GENRAY analysis did not include the SOL. AORSA has also been used to extend the simulations to include the SOL and to estimate possible power losses of helicon waves in the SOL. AORSA calculations show that another mode can propagate in the SOL and lead to significant (~10-20%) SOL losses at high SOL densities. Optimizing the SOL density profile can reduce these SOL losses to a few percent.},
doi = {10.1088/1741-4326/aab96d},
journal = {Nuclear Fusion},
number = 6,
volume = 58,
place = {United States},
year = {2018},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Lower hybrid current drive at high density in Alcator C-Mod
journal, July 2011


Sawtooth period changes with mode conversion current drive on Alcator C-Mod
journal, January 2007


Long-Pulse Improved Central Electron Confinement in the TCV Tokamak with Electron Cyclotron Heating and Current Drive
journal, February 2001


Reactor relevant current drive and heating by N-NBI on JT-60U
journal, November 2001


Observation of Parametric Instabilities in Lower-Hybrid Radio-Frequency Heating of Tokamaks
journal, January 1977


Absorption of lower hybrid waves in the scrape off layer of a diverted tokamak
journal, August 2010

  • Wallace, G. M.; Parker, R. R.; Bonoli, P. T.
  • Physics of Plasmas, Vol. 17, Issue 8
  • DOI: 10.1063/1.3465662

Full-wave calculation of sheared poloidal flow driven by high-harmonic ion Bernstein waves in tokamak plasmas
journal, August 2000

  • Jaeger, E. F.; Berry, L. A.; Batchelor, D. B.
  • Physics of Plasmas, Vol. 7, Issue 8
  • DOI: 10.1063/1.874197

High harmonic fast waves in high beta plasmas
journal, November 1995


Detailed measurements of the electron cyclotron current drive efficiency on DIII-D
journal, November 2002


Fast wave current drive at high ion cyclotron harmonics on DIII-D
journal, November 2001

  • Petty, C. C.; Baity, F. W.; deGrassie, J. S.
  • Plasma Physics and Controlled Fusion, Vol. 43, Issue 12
  • DOI: 10.1088/0741-3335/43/12/308

Progress toward fully noninductive discharge operation in DIII-D using off-axis neutral beam injection
journal, September 2013

  • Ferron, J. R.; Holcomb, C. T.; Luce, T. C.
  • Physics of Plasmas, Vol. 20, Issue 9
  • DOI: 10.1063/1.4821072

High-Harmonic Fast-Wave Power Flow along Magnetic Field Lines in the Scrape-Off Layer of NSTX
journal, July 2012


Lower-Hybrid Current Drive in the PLT Tokamak
journal, October 1982


Lower hybrid current drive at high density in the multi-pass regime
journal, June 2012

  • Wallace, G. M.; Faust, I. C.; Meneghini, O.
  • Physics of Plasmas, Vol. 19, Issue 6
  • DOI: 10.1063/1.4729734

High harmonic fast wave heating efficiency enhancement and current drive at longer wavelength on the National Spherical Torus Experiment
journal, May 2008

  • Hosea, J.; Bell, R. E.; LeBlanc, B. P.
  • Physics of Plasmas, Vol. 15, Issue 5
  • DOI: 10.1063/1.2837051

Radiofrequency experiments in JFT-2M: Demonstration of innovative applications of a travelling wave antenna
journal, December 2001


Particle transport in the scrape-off layer and its relationship to discharge density limit in Alcator C-Mod
journal, May 2001

  • LaBombard, B.; Boivin, R. L.; Greenwald, M.
  • Physics of Plasmas, Vol. 8, Issue 5
  • DOI: 10.1063/1.1352596

Toroidal and scattering effects on lower-hybrid wave propagation
journal, January 1982


Integrated modelling of steady-state scenarios and heating and current drive mixes for ITER
journal, August 2011


A High Power Helicon Antenna Design for DIII-D
journal, August 2017


Spectral effects on fast wave core heating and current drive
journal, June 2009


Neutral-Beam Current-Driven High-Poloidal-Beta Operation of the DIII-D Tokamak
journal, October 1988


Ray tracing study of the electron cyclotron current drive in DIII-D using 60 GHz
journal, January 1989

  • Matsuda, K.
  • IEEE Transactions on Plasma Science, Vol. 17, Issue 1
  • DOI: 10.1109/27.21664

Lower hybrid current drive experiments on Alcator C-Mod: Comparison with theory and simulation
journal, May 2008

  • Bonoli, P. T.; Ko, J.; Parker, R.
  • Physics of Plasmas, Vol. 15, Issue 5
  • DOI: 10.1063/1.2904569

Approximate formula for radiofrequency current drive efficiency with magnetic trapping
journal, October 1991


The influence of neutral beam optimization for DEMO on injector design
journal, May 2012


Full wave simulations of fast wave heating losses in the scrape-off layer of NSTX and NSTX-U
journal, May 2014


Off-axis neutral beam current drive for advanced scenario development in DIII-D
journal, May 2009


Overview of the ARIES-RS reversed-shear tokamak power plant study
journal, December 1997

  • Najmabadi, Farrokh; Bathke, Charles G.; Billone, Michael C.
  • Fusion Engineering and Design, Vol. 38, Issue 1-2
  • DOI: 10.1016/s0920-3796(97)00110-5

Application of very high harmonic fast waves for off-axis current drive in the DIII-D and FNSF-AT tokamaks
journal, June 2014


Development of a high power Helicon system for DIII-D
journal, November 2017


Using AORSA to simulate helicon waves in DIII-D
conference, January 2015

  • Lau, C.; Jaeger, E. F.; Bertelli, N.
  • RADIO FREQUENCY POWER IN PLASMAS: Proceedings of the 21st Topical Conference, AIP Conference Proceedings
  • DOI: 10.1063/1.4936534

New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks
journal, September 1981


Mode Conversion Heating and Current Drive Experiments in TFTR
journal, January 1996


All-orders spectral calculation of radio-frequency heating in two-dimensional toroidal plasmas
journal, May 2001

  • Jaeger, E. F.; Berry, L. A.; D’Azevedo, E.
  • Physics of Plasmas, Vol. 8, Issue 5
  • DOI: 10.1063/1.1359516

On radio frequency current drive in the ion cyclotron range of frequencies in DEMO and large ignited plasmas
journal, January 2015


Fast-ion transport and neutral beam current drive in ASDEX upgrade
journal, June 2015


Observation of Zero Current Density in the Core of JET Discharges with Lower Hybrid Heating and Current Drive
journal, August 2001


The effects of the scattering by edge plasma density fluctuations on lower hybrid wave propagation
journal, June 2013


A generalized plasma dispersion function for electron damping in tokamak plasmas
journal, October 2016

  • Berry, L. A.; Jaeger, E. F.; Phillips, C. K.
  • Physics of Plasmas, Vol. 23, Issue 10
  • DOI: 10.1063/1.4964766

Particle Pinch with Fully Noninductive Lower Hybrid Current Drive in Tore Supra
journal, April 2003


Neutral-Beam Current-Driven High-Poloidal-Beta Operation of the DIII-D Tokamak
journal, October 1988


Lower-Hybrid Current Drive in the PLT Tokamak
journal, October 1982


Observation of Zero Current Density in the Core of JET Discharges with Lower Hybrid Heating and Current Drive
journal, August 2001


Particle Pinch with Fully Noninductive Lower Hybrid Current Drive in Tore Supra
journal, April 2003


Mode Conversion Heating and Current Drive Experiments in TFTR
journal, January 1996


Long-Pulse Improved Central Electron Confinement in the TCV Tokamak with Electron Cyclotron Heating and Current Drive
journal, February 2001


Observation of Parametric Instabilities in Lower-Hybrid Radio-Frequency Heating of Tokamaks
journal, January 1977


New techniques for calculating heat and particle source rates due to neutral beam injection in axisymmetric tokamaks
journal, September 1981


High-Harmonic Fast-Wave Power Flow along Magnetic Field Lines in the Scrape-Off Layer of NSTX
journal, July 2012


Overview of the ARIES-RS reversed-shear tokamak power plant study
journal, December 1997

  • Najmabadi, Farrokh; Bathke, Charles G.; Billone, Michael C.
  • Fusion Engineering and Design, Vol. 38, Issue 1-2
  • DOI: 10.1016/S0920-3796(97)00110-5

    Works referencing / citing this record:

    Effect of wall boundary on the scrape-off layer losses of high harmonic fast wave in NSTX and NSTX-U
    journal, June 2019

    • Kim, Eun-Hwa; Bertelli, Nicola; Ono, Masayuki
    • Physics of Plasmas, Vol. 26, Issue 6
    • DOI: 10.1063/1.5091579