Ion Thermal Conductivity in a Helical Toroid

Potok, R.E.; Politzer, Peter; Lidsky, L.M.

doi:10.1103/physrevlett.45.1328

Cited by 34 publications

(14 citation statements)

References 3 publications

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“…The earliest numerical tools for investigating neoclassical transport in stellarators evolved from codes written to follow particle orbits in magnetic and electric fields [27,28]. Mathematically, such orbits represent solutions of the Vlasov equation obtained by the method of characteristics; an extension of this approach to treat the drift kinetic equation is thus largely a matter of developing numerical algorithms to simulate the effects of the collision operator.…”

Section: Transport Coefficientsmentioning

confidence: 99%

Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS)

et al. 2011

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Numerical results for the three mono-energetic transport coefficients required for a complete neoclassical description of stellarator plasmas have been benchmarked within an international collaboration. These transport coefficients are flux-surface-averaged moments of solutions to the linearised drift kinetic equation which have been determined using field-line-integration techniques, Monte Carlo simulations, a variational method employing Fourier-Legendre test functions and a finite difference scheme. The benchmarking has been successfully carried out for past, present and future devices which represent different optimisation strategies within the extensive configuration space available to stellarators.A qualitative comparison of the results with theoretical expectations for simple model fields is provided. The behaviour of the results for the mono-energetic radial and parallel transport coefficients can be largely understood from such theoretical considerations but the mono-energetic bootstrap current coefficient exhibits characteristics which have not been predicted.

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Section: Transport Coefficientsmentioning

confidence: 99%

Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS)

et al. 2011

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“…(1). As it was first found numerically via the Monte Carlo simulations [25], additional helical harmonics can For low-aspect-ratio stellarators in general, and especially for S S configurations where both Et and &h are significant and of the order of 1, neoclassical transport can be. in principle, very poor and requires careful optimization.…”

Section: Introductionmentioning

confidence: 73%

Helical post stellarator. Part 1: Vacuum configuration

Moroz¹

1997

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“…Because we compete the flux for each energy shell, g(E) is just a multiplicative parameter, so we shall set g = 1 henceforth, AV = (2ir) 2 rRAa is the volume of a toroidal shell, centered at the radius r of interest, and of thickness Aa, small compared with the minor radius a, and the scale lengths L a ~ a over which macroscopic quantities (such as temperature T or density n) vary appreciably. "AV" in /^v confines the phase space integral to that volume.…”

Section: Introductionmentioning

confidence: 99%

Bounce-averaged Fokker-Planck code for stellarator transport

Mynick¹,

Hitchon²

1985

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A computer code for solving the bounce-averaged Fokker-Pianck equation appropriate to stellarator transport has been developed, and its Eirst applications made. The code is much faster than the bounce-averaged MonteCarlo codes, which up to now have provided the most efficient numerical means for studying stellarator transport.Moreover, because the connection to analytic kinetic theory of the Fokker-Planck approach is more direct than cor the Monte-Carlo approach, a comparison of theory and numerical experiment is now possible at a considerably more detailed level than previously.

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Ion Thermal Conductivity in a Helical Toroid

Cited by 34 publications

References 3 publications

Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS)

Benchmarking of the mono-energetic transport coefficients—results from the International Collaboration on Neoclassical Transport in Stellarators (ICNTS)

Helical post stellarator. Part 1: Vacuum configuration

Bounce-averaged Fokker-Planck code for stellarator transport

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