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Modelling of the soft X-ray tungsten spectra expected to be registered by GEM detection system for WEST

Syrocki Ł., Szymańska E., Słabkowska K., Polasik M., Pestka G.

Nukleonika

2016

Vol. 61, No. 4

433--436

In the future International Thermonuclear Experimental Reactor (ITER), the interaction between the plasma and the tungsten chosen as the plasma-facing wall material imposes that the hot central plasma loses energy by X-ray emission from tungsten ions. On the other hand, the registered X-ray spectra provide alternative diagnostics of the plasma itself. Highly ionized tungsten emits extremely complex X-ray spectra that can be understood only after exhaustive theoretical studies. The detailed analyses will be useful for proper interpretation of soft X-ray plasma radiation expected to be registered on ITER-like machines, that is, Tungsten (W) Environment in Steady-state Tokamak (WEST). The simulations of the soft X-ray spectra structures for tungsten ions have been performed using the flexible atomic code (FAC) package within the framework of collisional-radiative (CR) model approach for electron temperatures and densities relevant to WEST tokamak.

Tribological electretization of polymer fibers during pneumoextrusion

Sviridenok A.I., Kovalevskaja T.I., Kravtsov A.G.

Tribologia

2003

nr 6

97-106

Physico-chemical nature and mechanism of triboelectret charge formation in polymeric materials obtained by melt-blowing method are investigated. It has been established, that during external friction surface electretization take place due to generation of capture centers C=0, C-O-C, C=C. The process of stretching is accompanied by reorganization of permolecular structure, appearance of internal friction and formation of volume charged defects.

Badano właściwości fizykochemiczne oraz mechanizm powstawania ładunku triboelektretycznego w materiałach polimerycznych, otrzymywanych metodą razdmuchiwania. Stwierdzono, że podczas tarcia zewnętrznego następuje elektretyzacja powierzchni spowodowana powstawaniem centrów C=0, C-O-C, C=C. Procesowi rozciągania towarzyszy powstawanie tarcia wewnętrznego i defektów.