Simulation of High Power Electromagnetic Wave Heating in the ITER Burning Plasma

Journal Article · Tue Jan 01 04:00:00 EST 2008 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2959128· OSTI ID:958905

Jaeger, Erwin Frederick ^[1]; Berry, Lee A ^[1]; D'Azevedo, Ed F ^[1]; Barrett, Richard F ^[1]; Ahern, Sean ^[1]; Swain, David W ^[1]; Batchelor, Donald B ^[1]; Harvey, R. W. ^[2]; Myra, J. R. ^[3]; D'Ippolito, D. A. ^[3]; Phillips, Cynthia ^[4]; Valeo, Dr Ernest ^[4]; Smithe, D. N. ^[5]; Bonoli, P. T. ^[6]; Wright, J. C. ^[6]; Choi, M. ^[7]

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1. ORNL
2. CompX, Del Mar, CA
3. Lodestar Research Corporation
4. Princeton Plasma Physics Laboratory (PPPL)
5. Tech-X Corporation
6. Massachusetts Institute of Technology (MIT)
7. General Atomics

The next step toward fusion as a practical energy source is the design and construction of ITER [R. Aymar, V. A. Chuyanov, M. Huguet, Y. Shimomura, ITER Joint Central Team, ITER Home Teams, Nucl. Fusion 41, 1301 (2001)], a device capable of producing and controlling the high performance plasma required for self-sustaining fusion reactions, i.e. "burning plasma." ITER relies in part on ion-cyclotron radio frequency power to heat the deuterium and tritium fuel to fusion temperatures. In order to heat effectively, the radio frequency wave fields must couple efficiently to the dense core plasma. Calculations in this paper support the argument that this will be the case. Three dimensional full-wave simulations show that fast magnetosonic waves in ITER propagate radially inward with strong central focusing and little toroidal spreading. Energy deposition, current drive, and plasma flow are all highly localized near the plasma center. Very high resolution, two dimensional calculations reveal the presence of mode conversion layers, where fast waves can be converted to slow ion cyclotron waves. When minority ions such as deuterium or helium-3 are used to damp the launched waves, these ions can be accelerated to high energies, forming supra-thermal tails that significantly affect the wave propagation and absorption. By neglecting the toroidal localization of the waves and the finite radial excursion of the energetic particle orbits, the quasilinear evolution of these supra-thermal ion tails can be simulated self-consistently in one spatial dimension and two velocity dimensions.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 958905
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 7 Vol. 15; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
ELECTROMAGNETIC RADIATION
ENERGY SOURCES
HEATING
HELIUM 3
MAGNETOACOUSTIC WAVES
MODE CONVERSION
PLASMA
SIMULATION
TAIL IONS
TWO-DIMENSIONAL CALCULATIONS
WAVE PROPAGATION