Skip to Main content Skip to Navigation
Journal articles

Validating heat balance models for tungsten dust in cold dense plasmas

Abstract : The first comparison of dust radius and surface temperature estimates, obtained from spectroscopic measurements of thermal radiation, with simulations of dust heating and vaporization by the MIGRAINe dust dynamics code is reported. The measurements were performed during controlled tungsten dust injection experiments in the cold and dense plasmas of Pilot-PSI, reproducing ITER divertor conditions. The comparison has allowed us to single out the dominating role of the work function contribution to the dust heating budget. However, in the plasmas of interest, dust was found to enter the strong vaporization regime, in which its temperature is practically insensitive to plasma properties and the various uncertainties in modelling. This makes the dust temperature a poor figure of merit for model validation purposes. On the other hand, simple numerical scalings obtained from orbital-motion-limited estimates were found to be remarkably robust and sufficient to understand the main physics at play in such cold and dense plasmas. Validating heat balance models for tungsten dust in cold dense plasmas 2
Complete list of metadatas

Cited literature [43 references]  Display  Hide  Download

https://hal.univ-lorraine.fr/hal-02372199
Contributor : Frédéric Brochard <>
Submitted on : Wednesday, November 20, 2019 - 12:34:57 PM
Last modification on : Monday, April 6, 2020 - 2:44:05 PM

Licence


Distributed under a Creative Commons Attribution - NonCommercial - NoDerivatives 4.0 International License

Identifiers

Collections

Citation

Ladislas Vignitchouk, Svetlana Ratynskaia, Mikhail Kantor, P. Tolias, Marco de Angeli, et al.. Validating heat balance models for tungsten dust in cold dense plasmas. Plasma Physics and Controlled Fusion, IOP Publishing, 2018, 60 (11), ⟨10.1088/1361-6587/aadbcb⟩. ⟨hal-02372199⟩

Share

Metrics

Record views

54

Files downloads

98