Kinetic effect of thermal force on impurity transport: Simulation of JT-60SA divertor with integrated divertor code SONIC

Shimizu, K.; Takizuka, T.; Kawashima, H.

doi:10.1016/j.jnucmat.2009.01.135

Cited by 11 publications

(9 citation statements)

References 15 publications

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“…Hence the C 3þ production flux is higher by two orders of magnitude than C 3þ loss flux, suggesting that the C 3þ population around the X-point is diminished due to effects not included in the present model yet such as transport related loss channels. The transport loss mechanism will be investigated with an improved impurity transport code such as IMPMC [9].…”

Section: Discussion and Summarymentioning

confidence: 99%

Radiation process of carbon ions in JT-60U detached divertor plasmas

Nakano

Kubo

Asakura

et al. 2009

Journal of Nuclear Materials

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Section: Discussion and Summarymentioning

confidence: 99%

Radiation process of carbon ions in JT-60U detached divertor plasmas

Nakano

Kubo

Asakura

et al. 2009

Journal of Nuclear Materials

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“…which is obtained from (17) under the circular flux surface assumption, is added to the total heat flux density q i heat .…”

Section: Psmentioning

confidence: 99%

“…For example, B2.5 [12] and UEDGE [13,14] are multifluid SOL plasma simulation codes which can solve impurity transport within the fluid approximation. DIVIMP [15], DORIS [16], IMPMC [17], ASCOT [18] and IMPGYRO [19][20][21] are wellused kinetic impurity transport codes. Fluid models treat impurities as a fluid element, while most of the kinetic models solve trajectories of each test impurity particle.…”

Section: Introductionmentioning

confidence: 99%

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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“…In contrast to the fluid thermal force which is averaged over a Maxwellian velocity distribution of impurity ions, the kinetic thermal force was found to have the opposite direction (towards the colder region) for impurity ions with high speeds. We independently derived an expression for the kinetic thermal force [14]. The entire ion thermal force acting on the impurity ions is defined by…”

Section: Kinetic Thermal Forcementioning

confidence: 99%

“…Simulations of He transport were carried out with the IMPMC code for the detached divertor plasma of JT-60SA [14]. In this paper, the effect of kinetic thermal force on He transport is further investigated.…”

Section: Kinetic Effect Of Thermal Force On Helium Retentionmentioning

confidence: 99%

Kinetic modelling of impurity transport in detached plasma for integrated divertor simulation with SONIC (SOLDOR/NEUT2D/IMPMC/EDDY)

et al. 2009

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An integrated divertor simulation code SONIC has been developed. The self-consistent coupling of an MC impurity code IMPMC to a divertor code SOLDOR/NEUT2D is succeeded by overcoming the intrinsic problems of Monte Carlo (MC) modelling for impurity transport. MC modelling for impurity transport is required in order to take into account the kinetic effect and the complex dissociation processes of hydrocarbons. The integrated divertor code SONIC enables us to investigate the details of impurity transport including erosion/redeposition processes on the divertor plates by further coupling of an MC code EDDY. The dynamic evolution of X-point MARFE observed in JT-60U is investigated. The simulation results indicate that the hydrocarbons sputtered from the dome contribute directly to the enhanced radiation near the X-point. Without the recycling, the kinetic effect of the thermal force improves the helium compression, compared with the conventional (fluid) evaluation. This effect is, however, masked by the recycling at the divertor targets.

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Kinetic effect of thermal force on impurity transport: Simulation of JT-60SA divertor with integrated divertor code SONIC

Cited by 11 publications

References 15 publications

Radiation process of carbon ions in JT-60U detached divertor plasmas

Radiation process of carbon ions in JT-60U detached divertor plasmas

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

Kinetic modelling of impurity transport in detached plasma for integrated divertor simulation with SONIC (SOLDOR/NEUT2D/IMPMC/EDDY)

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