Effects of nonequilibrium particle distributions in deuterium-tritium burning

Michta, David; Graziani, Frank; Luu, Thomas; Pruet, Jason
January 2010
Physics of Plasmas;Jan2010, Vol. 17 Issue 1, p012707
Academic Journal
The effects of nonequilibrium particle distributions resulting from rapid deuterium-tritium burning in plasmas are investigated using a Fokker–Planck code that incorporates small-angle Coulomb scattering, bremsstrahlung, Compton scattering, and light-ion fusion. For inertial confinement fusion environments, it is found that deviations away from Maxwellian distributions for either deuterium or tritium ions are small and result in 1% changes in the energy production rates. The deuterium and tritium effective temperatures are not equal, but differ by only about 2.5% near the time of peak burn rate. Simulations with high Z (Xe) dopants show that the dopant temperature closely tracks that of the fuel. On the other hand, fusion product ion distributions are highly non-Maxwellian, and careful treatments of energy-exchange between these ions and other particles is important for determining burn rates.


Related Articles

  • Implosion and core heating requirements in subignition experiments FIREX-I. Johzaki, Tomoyuki; Nakao, Yasuyuki; Mima, Kunioki // Physics of Plasmas;Jun2008, Vol. 15 Issue 6, p062702 

    In the fast ignition realization experiment project phase-I (FIREX-I) [H. Azechi and the FIREX Project, Plasma Phys. Control. Fusion 48, B267 (2006)], core heating up to an ion temperature of 5 keV is expected for subignition-class carbon-deuterium (CD) and deuterium-tritium (DT) fuels. The...

  • ICRF Heating for the Non-Activated Phase of ITER: From Inverted Minority to Mode Conversion Regime. Mayoral, M.-L.; Lamalle, P. U.; Van Eester, D.; Beaumont, P.; De La Luna, E.; De Vries, P.; Gowers, C.; Felton, R.; Harling, J.; Kiptily, V.; Lawson, K.; Laxåback, M.; Lerche, E.; Lomas, P.; Mantsinen, M. J.; Meo, F.; Noterdaeme, J.-M.; Nunes, I.; Piazza, G.; Santala, M. // AIP Conference Proceedings;2005, Vol. 787 Issue 1, p122 

    In the initial phase of ITER H plasmas will be used in order to avoid activating the machine. The reference ICRF healing scenarios rely on minority species such as Helium (3He) or deuterium (D). These schemes’ distinctive feature comes from the presence of the fast magnetosonic wave...

  • Relativistic particle dynamics in a steepening magnetosonic wave. Lembege, B.; Dawson, J. M. // Physics of Fluids B: Plasma Physics;May89, Vol. 1 Issue 5, p1001 

    Acceleration of both electrons and ions to relativistic energy by large amplitude magnetosonic waves is investigated by use of numerical simulation. Nonlinear effects are shown to form the saturation mechanism and limit the amplitude below the level where a particle specie can undergo unlimited...

  • Symmetry and Conservation Laws for a Dirac Equation in a Riemannian Space. Shapovalova, O. V. // Russian Physics Journal;Mar2003, Vol. 46 Issue 3, p249 

    The linkage of the linear symmetry operators of the Dirac–Fock equation for electrons and massless particles with the differential conservation laws and the symmetry of equations in conformal spaces are studied.

  • Two-dimensional particle simulation of the current flow to a flush-mounted Langmuir probe in a strong oblique magnetic field. Bergmann, A. // Physics of Plasmas;Aug2002, Vol. 9 Issue 8, p3413 

    The current flow to flat Langmuir probes mounted flush into divertor target plates or limiter in a tokamak is studied with particle-in-cell simulations. The simulation model is two-dimensional in real space and three-dimensional in velocity space resolving the gyration of electrons and ions. The...

  • High-brightness source for ion and electron beams (invited). Kalbitzer, S.; Knoblauch, A. // Review of Scientific Instruments;Feb1998, Vol. 69 Issue 2, p1026 

    Investigates the emission of ion and electron beams from tungsten and iridium. Comparison of the brightness values between high-brightness sources and other sources of charged particle emission; Estimation of the limiting image size using the source properties; Consideration of ion beam...

  • Escaping fast ion diagnostics in compact helical system heliotron/torsatron. Isobe, M.; Darrow, D.S.; Kondo, T.; Sasao, M.; Toi, K.; Osakabe, M.; Shimizu, H.; Yoshimura, Y.; Takahashi, C.; Murakami, S.; Okamura, S.; Matsuoka, K. // Review of Scientific Instruments;Jan1999, Vol. 70 Issue 1, p827 

    Explains the classical single particle behavior in the probe of the compact helical system heliotron/torsatron. Description of the probe hardware; Various features of the detected escaping fast ions; Loss process of the detected fast ions; Comparison of the pitch angle variation of computed...

  • Temperature ratio dependence of ion temperature gradient and trapped electron mode instability thresholds. Casati, Alessandro; Bourdelle, C.; Garbet, X.; Imbeaux, F. // Physics of Plasmas;Apr2008, Vol. 15 Issue 4, p042310 

    The impact of ion to electron temperature ratio Ti/Te on the instability thresholds of ion temperature gradient (ITG) and trapped electron modes (TEMs) is both analytically and numerically addressed. An analytical kinetic approach is developed accounting for the ion (electron, respectively)...

  • Development of exchange-correlation functionals with minimal many-electron self-interaction error. Cohen, Aron J.; Mori-Sánchez, Paula; Weitao Yang // Journal of Chemical Physics;5/21/2007, Vol. 126 Issue 19, p191109 

    New exchange-correlation functionals that address the important issue of many-electron self-interaction are developed. This is carried out by considering the performance of the functional on systems with fractional numbers of electrons at the same time as more standard thermochemical tests. The...


Read the Article


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

Try another library?
Sign out of this library

Other Topics