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Author

C. Gordon

Bio: C. Gordon is an academic researcher from Max Planck Society. The author has an hindex of 1, co-authored 1 publications receiving 4 citations.

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Journal ArticleDOI
TL;DR: A physical model for dust transport simulation and a newly developed code DUSTT are discussed in this article, which incorporates both dust dynamics due to comprehensive dust-plasma interactions as well as the effects of dust heating, charging, and evaporation.
Abstract: Dust particulates in the size range of 10nm–100μm are found in all fusion devices. Such dust can be generated during tokamak operation due to strong plasma∕material-surface interactions. Some recent experiments and theoretical estimates indicate that dust particles can provide an important source of impurities in the tokamak plasma. Moreover, dust can be a serious threat to the safety of next-step fusion devices. In this paper, recent experimental observations on dust in fusion devices are reviewed. A physical model for dust transport simulation and a newly developed code DUSTT are discussed. The DUSTT code incorporates both dust dynamics due to comprehensive dust-plasma interactions as well as the effects of dust heating, charging, and evaporation. The code tracks test dust particles in realistic plasma backgrounds as provided by edge-plasma transport codes. The results are presented for dust transport in current and next-step tokamaks. The effect of dust on divertor plasma profiles and core plasma conta...

143 citations

Journal ArticleDOI
TL;DR: In this article, a physical model for dust transport in tokamak devices is presented, as well as modeling results on dynamics of dust particles in plasma and conditions necessary for particle growth in plasma.

34 citations

Journal ArticleDOI
TL;DR: In this paper, the authors studied the transport of charges, mass and heat of dust particles in a weakly ionized plasma, and the dependence of electric conductivity, diffusion coefficient and heat conduction coefficient of the dust particles on total number of particles, number of neutrals, and collision cross section area between dust particles and neutrals.
Abstract: Transportation of charges, mass and heat of dust particles in a weakly ionized plasma is studied in the present paper. The dependence of electric conductivity, diffusion coefficient and heat conduction coefficient of dust particles on total number density and temperature of dust particles, number density and mass of neutrals, as well as collision cross section area between dust particles and neutrals are given. Effects of dust size distribution on electric conductivity, diffusion coefficient and heat conduction coefficient of dust particles have also been investigated. It is noted that they increase as the mean value of radius of dust particles increases. They increase as difference between maximum and minimum values of dust particles increases when density of the small grains is smaller than that of large grains. However, they decrease as difference between maximum and minimum values of dust particles increases when density of the small grains is larger than that of large grains.

5 citations

01 Jan 2003
TL;DR: In this paper, the results of the ITER safety assessments during the course of the Engineering Design Activities (EDA) are summarized, including effluents and emissions from normal operation, including planned maintenance activities; occupational safety for workers at the facility; radioactive materials and wastes generated during operation and from decommissioning; and potential incidents and accidents and the resulting transients.
Abstract: This paper summarises the results of the ITER safety assessments during the course of the Engineering Design Activities (EDA). The key aspects of ITER safety are effluents and emissions from normal operation, including planned maintenance activities; occupational safety for workers at the facility; radioactive materials and wastes generated during operation and from decommissioning; and potential incidents and accidents and the resulting transients. The implementation of a generic safety approach, the safety aspects of the design, and the assessments of effluents, occupational safety, waste, and accidents are documented in the Generic Site Safety Report (GSSR). The analyses and assessments completed in collaboration with the Home Team experts and documented in the GSSR offer a well-developed technical basis for regulatory applications in potential host countries.

3 citations