TITLE

Simulation of high-power electromagnetic wave heating in the ITER burning plasma

AUTHOR(S)
Jaeger, E. F.; Berry, L. A.; D’Azevedo, E. F.; Barrett, R. F.; Ahern, S. D.; Swain, D. W.; Batchelor, D. B.; Harvey, R. W.; Myra, J. R.; D’Ippolito, D. A.; Phillips, C. K.; Valeo, E.; Smithe, D. N.; Bonoli, P. T.; Wright, J. C.; Choi, M.
PUB. DATE
July 2008
SOURCE
Physics of Plasmas;Jul2008, Vol. 15 Issue 7, p072513
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The next step toward fusion as a practical energy source is the design and construction of ITER [R. Aymar et al., 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 suprathermal 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 suprathermal ion tails can be simulated self-consistently in one spatial dimension and two velocity dimensions.
ACCESSION #
34360761

 

Related Articles

  • Propagation and Ion Dynamics of Waves in Amplitude Modulated Helicon Plasmas. Stark, A.; Grulke, O.; Klinger, T. // AIP Conference Proceedings;2006, Vol. 812 Issue 1, p141 

    A helicon source is driven with amplitude modulated RF at modulation frequencies near the ion cyclotron frequency in the VINETA device. In response to the modulation propagating electromagnetic waves are found, whose dispersion differs significantly from linear wave dispersion theory. This...

  • Power absorption of high-frequency electromagnetic waves in a partially ionized magnetized plasma. Bin Guo; Xiaogang Wang // Physics of Plasmas;Aug2005, Vol. 12 Issue 8, p084506 

    Power absorption of high-frequency electromagnetic waves in a uniformly magnetized plasma layer covering a highly conducting surface is studied under atmosphere conditions. It is assumed that the system consists of not only electrons and positive ions but negative ions as well. By a general...

  • Electron temperature and fluctuation correlation measurements using dual analyzers with a heavy ion beam probe. Michael, J. D.; Saravia, E.; Hickok, R. L.; Jennings, W. C. // Review of Scientific Instruments;Aug1986, Vol. 57 Issue 8, p1828 

    A heavy ion beam probe has been operated with two separate electrostatic energy analyzers to allow simultaneous detection of 2[sup +] and 3[sup +] secondary ions coming from a singly charged probing beam. This configuration provides rapid, spatially resolved measurements of the electron...

  • Ion- and electron-acoustic solitons in two-electron temperature space plasmas. Lakhina, G. S.; Kakad, A. P.; Singh, S. V.; Verheest, F. // Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p062903 

    Properties of ion- and electron-acoustic solitons are investigated in an unmagnetized multicomponent plasma system consisting of cold and hot electrons and hot ions using the Sagdeev pseudopotential technique. The analysis is based on fluid equations and the Poisson equation. Solitary wave...

  • Free-bound electron exchange contribution to l-split atomic structure in dense plasmas. Bennadji, K.; Rosmej, F.; Lisitsa, V. S. // EPJ Web of Conferences;2013, Issue 59, p1 

    An analytical expression for the exchange energy between the bound electron in hydrogen-like ions and the free electrons of plasma is proposed. Two limiting cases are identified: 1) the low temperature limit where the energy depends linearly on density and on the ion charge as 1/Z² but does...

  • Excitation of electromagnetic waves by relativistic electron beam in a plasma filled rippled wall... Choyal, Y.; Maheshwari, K.P. // Physics of Plasmas;Jan1994, Vol. 1 Issue 1, p171 

    Examines the excitation of electromagnetic waves by relativistic electron beam in a plasma filled rippled wall waveguide. Dispersion relation of a plasma filled rippled wall waveguide; Expression for the minimum frequency of electromagnetic waves excited in plasma filled backward wave...

  • Weibel instability associated with inverse bremsstrahlung absorption of intense electromagnetic radiation. Romanov, A. Yu.; Silin, V. P.; Uryupin, S. A. // Journal of Experimental & Theoretical Physics; 

    We investigate the Weibel instability in a plasma with a nonstationary three-temperature electron distribution generated by inverse bremsstrahlung of an intense elliptically polarized electromagnetic wave. We show that electron-ion collisions in this strong high frequency field are...

  • Two-frequency heating technique at the 18 GHz electron cyclotron resonance ion source of the National Institute of Radiological Sciences. Biri, S.; Kitagawa, A.; Muramatsu, M.; Drentje, A. G.; Rácz, R.; Yano, K.; Kato, Y.; Sasaki, N.; Takasugi, W. // Review of Scientific Instruments;2014, Vol. 85 Issue 2, p1 

    The two-frequency heating technique was studied to increase the beam intensities of highly charged ions provided by the high-voltage extraction configuration (HEC) ion source at the National Institute of Radiological Sciences (NIRS). The observed dependences on microwave power and frequency...

  • Nonlinear evolution of electromagnetic ion cyclotron waves. Silin, I.; Sydora, R. D.; Mann, I. R.; Sauer, K.; Mace, R. L. // Physics of Plasmas;Apr2011, Vol. 18 Issue 4, p042108 

    Hybrid Vlasov-Fourier modeling is used to investigate the nonlinear evolution of electromagnetic ion cyclotron (EMIC) waves driven by proton temperature anisotropy in plasmas with a population of He+ ions and a cold proton background. In the pure proton-electron plasma, most of the free energy...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics