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Suprathermal deuter...
Suprathermal deuterium ions produced by nuclear elastic scattering of ICRH driven He-3 ions in JET plasmas
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Zaitsev, F. S. (författare)
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Gondhalekar, A. (författare)
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- Johnson, Thomas J. (författare)
- KTH,Fusionsplasmafysik
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Sharapov, S. E. (författare)
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Testa, D. S. (författare)
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Kurbet, I. I. (författare)
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(creator_code:org_t)
- 2007-09-24
- 2007
- Engelska.
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Ingår i: Plasma Physics and Controlled Fusion. - : IOP Publishing. - 0741-3335 .- 1361-6587. ; 49:11, s. 1747-1766
- Relaterad länk:
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https://infoscience....
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Measurements of the suprathermal tail of the energy distribution function of deuterium ions, in plasmas containing MeV energy ICRH driven minority He-3 ions and majority deuterium ions, revealed that the suprathermal tail ion density exceeded by nearly an order of magnitude that expected due to nuclear elastic scattering (NES) of He-3 projectile ions on deuterium target ions. The experiments were performed on the Joint European Torus (JET), measurements of the line-of-sight integrated energy distribution functions of He-3 and suprathermal deuterium ions were made using a high energy neutral particle analyzer. The NES or 'knock-on' deuterium ion energy distribution function was simulated using the FPP-3D Fokker-Plank code (Zaitsev et al 2002 Nucl. Fusion 42 1340) which solves the 3D trajectory averaged kinetic equations in JET tokamak geometry while taking into account NES of He-3 ions on the deuterium ions. The required input energy distribution function of ICRH driven He-3 ions was simulated using the SELFO code (Hedin et al 2002 Nucl. Fusion 42 527). The comparison between measurement and simulation in the He-3 ICRH experiments is contrasted with an analogous previous comparison between measurements and simulation of JET plasmas in which 3.5MeV DT fusion alpha-particles were the projectile ions, where measurement and simulation roughly agreed. Possible explanations for the observed excess knock-on deuterium tail in the experiments with He-3 minority
Nyckelord
- joint european torus
- fusion alpha-particles
- close collisions
- tokamak plasmas
- distributions
- equations
- protons
- tftr
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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