Time-dependent modeling of dust outburst into tokamak divertor plasma

Smirnov, R. D.; Krasheninnikov, S. I.

doi:10.1063/5.0009767

Title: Time-dependent modeling of dust outburst into tokamak divertor plasma

Journal Article · Thu Aug 27 00:00:00 EDT 2020 · Physics of Plasmas

DOI:https://doi.org/10.1063/5.0009767· OSTI ID:1651182

^[1]; Krasheninnikov, S. I. ^[1]

University of California, San Diego, La Jolla, CA (United States)

The first self-consistent simulation studies of the impact of transient injection of tungsten dust on ITER-like edge plasma are presented. The simulations are performed using DUSTT and UEDGE codes coupled in a fully time-dependent manner. The evolution of the divertor and upstream plasma conditions, following the injection of tungsten dust of various quantities and sizes at the outer strike point, is investigated. The estimates of the core plasma impurity fraction and the core impurity screening factor associated with the dust injection are also obtained. Here, the simulations show that the bursts of even modest amounts of tungsten dust injected into the divertor plasmas can result in large perturbations of the divertor power load and unacceptable levels of the core plasma contamination with tungsten impurities.

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Research Organization:: University of California, San Diego, La Jolla, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-06ER54852

OSTI ID:: 1651182

Alternate ID(s):: OSTI ID: 1651165

Journal Information:: Physics of Plasmas, Vol. 27, Issue 8; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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