1. Comparison of Tungsten Modification After Irradiation at Different Facilities for PSI Studies.
- Author
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A. A., Shoshin, A. S., Arakcheev, Bataev, I. A., Bataev, V. A., A. V., Burdakov, I. A., Ivanov, A. A., Kasatov, S. V., Polosatkin, V. V., Postupaev, A. A., Vasilyev, and L. N., Vyacheslavov
- Subjects
PLASMA-wall interactions ,ELECTRON beams ,TUNGSTEN ,PLASMA accelerators ,TOKAMAKS - Abstract
Results from different facilities for plasma-surface interaction (PSI) studies are compared and their relevance to each other and conditions of ITER transient events are discussed. For PSI studies different types of devices were used including open traps, tokamaks, linear plasma machines including quasi-stationary plasma accelerators, electron beams and lasers. The same damage thresholds were demonstrated with different techniques. At energy loads corresponding to ITER transient events (edge localized modes (ELMs), disruptions, etc.) only macroscopic erosion mechanisms are important. They are cracking, droplet formation and macroscopic mass losses of the target. Cracking occurs during cooling stage after irradiations. Details of plasma stream parameters are of secondary importance for cracks formation; only target temperature plays a role. Macroscopic mass losses strongly correspond with melting of a thin surface layer and heat loads play a key role for melting. Heat flux defines the targets surface erosion. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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