A detailed analysis is performed of the results of numerical simulations of the dynamics of plasma blobs, obtained within the model of the nonlinear interchange mode, including the effects of the dissipation by dust, in tokamak scrape-off layer plasmas. The maximum distances that a plasma blob may travel in the radial direction are calculated under physical conditions characteristic for several large tokamaks that are presently in operation, and it is found that a relatively small amount of 30 nm carbon dust particulates, corresponding to only a few grams of dust in the entire scrape-off layer, may dissipate the blobs and prevent them from reaching the tokamak wall.
Effects of dust particles on the dynamics of blobs in the scrape off layer II / D., Jovanović; DE ANGELIS, Umberto. - In: PHYSICS OF PLASMAS. - ISSN 1070-664X. - STAMPA. - 19:(2012), pp. 22501-1-22501-9. [10.1063/1.3680610]
Effects of dust particles on the dynamics of blobs in the scrape off layer II
DE ANGELIS, UMBERTO
2012
Abstract
A detailed analysis is performed of the results of numerical simulations of the dynamics of plasma blobs, obtained within the model of the nonlinear interchange mode, including the effects of the dissipation by dust, in tokamak scrape-off layer plasmas. The maximum distances that a plasma blob may travel in the radial direction are calculated under physical conditions characteristic for several large tokamaks that are presently in operation, and it is found that a relatively small amount of 30 nm carbon dust particulates, corresponding to only a few grams of dust in the entire scrape-off layer, may dissipate the blobs and prevent them from reaching the tokamak wall.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
