Fast-Wave Heating of Two-Ion Plasmas in the Princeton Large Torus through Minority-Cyclotron-Resonance Damping

Hosea, J.; Bernabei, S.; Colestock, P.; Davis, S.; Efthimion, P. C.; Goldston, Robert James; Hwang, D. Q.; Medley, S. S.; Mueller, D.; Strachan, J.D.; Thompson, H.R.

doi:10.1103/physrevlett.43.1802

Cited by 73 publications

(41 citation statements)

References 5 publications

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“…A by-product of minority ion and second harmonic heating is the production of very energetic ion energy distributions which are in quantitative agreement with the prediction of theory (8). The first evidence that the energetic ion beta could be affecting core plasma stability was the observation of giant sawteeth on PLT (e.g., see Fig.…”

Section: Interaction Of Rf Waves With Fast Particlessupporting

confidence: 84%

The development of RF heating of magnetically confined deuterium-tritium plasmas

Hosea¹,

Bemabei²,

LeBlanc³

et al. 1999

AIP Conference Proceedings

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Abstract. The experimental and theoretical development of ion cyclotron radofrequency heating (ICRF) in toroidal magnetically-confined plasmas recently culminated with the demonstration of ICRF heating of D-T plasmas, first in the Tokamak Fusion Test Reactor (TFTR) and then in the Joint European Torus (JET). Various heating schemes based on the cyclotron resonances between the plasma ions and the applied ICRF waves have been used, including second harmonic tritium, minority deuterium, minority helium-3, mode conversion at the D-T ion-ion hybrid layer, and and ion Bernstein wave heating. Second harmonic tritium heating was first shown to be effective in a reactor-grade plasma in TFTR. D-minority heating on JET has led to the achievement of Q = 0.22, the ratio of fusion power produced to RF power input, sustained over a few energy confinement times. In this paper, some of the key building blocks in the development of rf heating of plasmas are reviewed and prospects for the development of advanced methods of plasma control based on the application of rf waves are discussed.

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Section: Interaction Of Rf Waves With Fast Particlessupporting

confidence: 84%

The development of RF heating of magnetically confined deuterium-tritium plasmas

Hosea¹,

Bemabei²,

LeBlanc³

et al. 1999

AIP Conference Proceedings

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“…The wave is evanescent in the low density region near the plasma periphery both on the low and high field side and as a consequence reflection occurs (hence the necessity of tuning in the transmission line). 4) by solving the Fokker Planck equation in steady state [7], and indeed, there was good fit to this theory with the experimental data obtained by Hosea and co-workers [8] ( see Fig. The remaining power is transmitted partially into the FW on the high field side of the n | | 2 = S resonance layer, and is partially mode converted into the " ion Bernstein" wave (IBW).…”

Section: In the 1970s And 80s The Fast Wave Was Used To Heat The Largsupporting

confidence: 64%

“…Measured distribution of energetic minority ion species in the PLT tokamak and comparison with the Stix theory(Hosea, 1979).…”

mentioning

confidence: 99%

RF Heating and Current Drive in Magnetically Confined Plasma: a Historical Perspective

Porkolab¹

2007

AIP Conference Proceedings

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The history of high power RF waves injected into magnetically confined plasma for the purposes of heating to fusion relevant temperatures spans nearly five decades. The road to success demanded the development of the theory of wave propagation in high temperature plasma in complex magnetic field geometries, development of antenna structures and transmission lines capable of handling high RF powers, and the development of high power RF (microwave) sources. In the early days, progress was hindered by the lack of good confinement of energetic particles formed by high power RF wave-plasma interactions. For example, in the ion cyclotron resonance frequency regime (ICRF) ions with energies in the multi-100keV, or even MeV range may be formed due to the presence of efficient "minority species" absorption. Electrons with similar energies can be formed upon the injection of RF waves in the electron cyclotron resonance (ECRH) or lower hybrid range of frequencies (LHRF) because of quasilinear Landau (cyclotron) interactions between waves and particles. In this paper a summary of four decades of historical evolution of wave heating and current drive results will be given.

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“…This has already been demonstrated at many tokamaks [2,3, and references therein]. Many measurements of the ICRH acceleration have been carried out using neutral particle analyzers [4] or measurement of the neutron rates created by D-D fusion. In addition, neutron spectroscopy has become a valuable tool [5,6], because the neutron energy spectrum yields information about the velocity distribution of the initial fusion reactants (i.e.…”

Section: Introductionmentioning

confidence: 94%

Phase-space resolved measurement of 2nd harmonic ion cyclotron heating using FIDA tomography at the ASDEX Upgrade tokamak

et al. 2017

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Fast-Wave Heating of Two-Ion Plasmas in the Princeton Large Torus through Minority-Cyclotron-Resonance Damping

Cited by 73 publications

References 5 publications

The development of RF heating of magnetically confined deuterium-tritium plasmas

The development of RF heating of magnetically confined deuterium-tritium plasmas

RF Heating and Current Drive in Magnetically Confined Plasma: a Historical Perspective

Phase-space resolved measurement of 2nd harmonic ion cyclotron heating using FIDA tomography at the ASDEX Upgrade tokamak

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