Test Simulations of Temperature Screening Effect by using Kinetic Monte Carlo Model

Homma, Y.; Hatayama, A.; Sawada, Yukimasa; Yamoto, S.

doi:10.1585/pfr.9.1403095

Cited by 1 publication

(13 citation statements)

References 9 publications

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“…The numerical coefficients of NC IWP and NC TSE in (26), which are 0.9 and −0.59, respectively, are close to those presented in the preceding studies [6,7], i.e. approximately 1 for NC IWP and −0.5 for NC TSE.…”

Section: Estimation Of the Nc Iwp And Nc Tsesupporting

confidence: 86%

“…The sign of the coefficients in (26) indicates that the NC IWP and NC TSE are acting opposite to each other, when…”

Section: Estimation Of the Nc Iwp And Nc Tsementioning

confidence: 99%

“…We will use (26) as a reference for checking our NC transport model in section 4. It is important to recall that, although we have chosen appropriate numerical coefficients C 1 and C 2 , the theoretical formula (26) was still derived using other idealised assumptions (especially assumptions 8 and 9 in this section). From these assumptions, a difference can occur between theory and simulation.…”

Section: Estimation Of the Nc Iwp And Nc Tsementioning

confidence: 99%

“…[10,11,25] • For the classical temperature screening effect, the diamagnetic heat flux density ∧ q i, heat in ( 14) is included in the total heat flux density q i heat . [8,26] • For the NC IWP, the PS ion flow ∥ V i,…”

Section: Psmentioning

confidence: 99%

“…A series of test simulations are performed to check the model. Simulated results on the impurity transport behaviour are compared with neoclassical theory (26).…”

Section: Test Simulations Of Neoclassical Impurity Transportmentioning

confidence: 99%

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Kinetic modelling for neoclassical transport of high-Z impurity particles using a binary collision method

et al. 2016

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A new kinetic model for neoclassical impurity particle transport simulation has been developed. Our model is able to simulate the following two effects, which have been theoretically predicted, but neglected in most of the existing kinetic impurity transport simulations in the SOL (scrape-off layer)/Divertor plasmas of tokamak; (1) the neoclassical inward pinch (NC IWP) due to the density gradient of background plasmas and (2) the neoclassical temperature screening effect (NC TSE, outward transport) caused by the plasma temperature gradient. The IWP and TSE, both proportional to the impurity charge number Z, become especially important for higher-Z impurities such as tungsten. In this paper we focus on the case where background plasmas are in the Pfirsch–Schlüter regime. The velocity distribution of background plasma ions is modelled by a distorted Maxwellian distribution, which includes the Pfirsch–Schlüter flow velocity and the Pfirsch–Schlüter heat flux density, in order to reproduce the NC IWP and NC TSE. A series of test simulations have been performed for a toroidal magnetic field geometry. Characteristics of the neoclassical transport, such as dependencies on the safety factor and on the impurity charge number, have been confirmed.

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Section: Estimation Of the Nc Iwp And Nc Tsesupporting

confidence: 86%

“…The sign of the coefficients in (26) indicates that the NC IWP and NC TSE are acting opposite to each other, when…”

Section: Estimation Of the Nc Iwp And Nc Tsementioning

confidence: 99%

Section: Estimation Of the Nc Iwp And Nc Tsementioning

confidence: 99%

Section: Psmentioning

confidence: 99%

“…A series of test simulations are performed to check the model. Simulated results on the impurity transport behaviour are compared with neoclassical theory (26).…”

Section: Test Simulations Of Neoclassical Impurity Transportmentioning

confidence: 99%

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