Effect of boundary conditions on the neutral gas temperatures and densities in the ITER divertor and pump duct

Ruzic, D. N.; Juliano, D. R.

doi:10.1016/s0022-3115(06)80030-9

Cited by 5 publications

(4 citation statements)

References 4 publications

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“…The dash-dotted line shows that the radial neutral hydrogen density profile by switching off the reflection input while solid line contains the contribution from the reflection [26]. It is also noticed that another plasma material interaction process, i.e.…”

Section: Resultsmentioning

confidence: 96%

“…As mentioned earlier, charge exchange and elastic collision processes contribute less to the neutral hydrogen density at plasma edge (see figure 4) and hence their contributions to the H α emissions are smaller. In order to the role of reflection in the observed H α spectrum, we have run the simulations considering no reflection by setting P r = 0 and with reflection by setting P r = reflection yield data [26]. The reflection process also contributes almost 11% in the spectrum.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

et al. 2017

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Neutral particle behavior in Aditya tokamak, which has a circular poloidal ring limiter at one particular toroidal location, has been investigated using DEGAS2 code. The code is based on the calculation using Monte Carlo algorithms and is mainly used in tokamaks with divertor configuration. This code has been successfully implemented in Aditya tokamak with limiter configuration. The penetration of neutral hydrogen atom is studied with various atomic and molecular contributions and it is found that the maximum contribution comes from the dissociation processes. For the same, H α spectrum is also simulated and matched with the experimental one. The dominant contribution around 64% comes from molecular dissociation processes and neutral particle is generated by those processes have energy of ~2.0 eV. Furthermore, the variation of neutral hydrogen density and H α emissivity profile are analysed for various edge temperature profiles and found that there is not much changes in H α emission at the plasma edge with the variation of edge temperature (7-40 eV).

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

et al. 2017

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“…Secondly, a model of recycling at the divertor plate is incorporated into simulations and the total effect of the kinetic thermal force on the He transport is investigated. In the recycling model, a He neutral is emitted with an energy determined from the particle and energy reflection coefficients [14]. The thermalization process of He ion ionized after recycling is simulated by Monte-Carlo method, in contrast to the fluid modelling with the assumption of instantaneous thermalization of impurity ions.…”

Section: Kinetic Effect Of Thermal Force On Impurity 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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“…In the recycling model, a He neutral is emitted with an energy determined from the particle and energy reflection coefficients [16]. The thermalization process of He ion which is ionized after recycling is simulated by MonteCarlo method, in contrast to the fluid modelling with the assumption of instantaneous thermalization of impurity ions.…”

Section: Simulation Of He Transport With Impmcmentioning

confidence: 99%

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

Shimizu

Takizuka

Kawashima

2009

Journal of Nuclear Materials

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Effect of boundary conditions on the neutral gas temperatures and densities in the ITER divertor and pump duct

Cited by 5 publications

References 4 publications

Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

Investigation of neutral particle dynamics in Aditya tokamak plasma with DEGAS2 code

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

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

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