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Information × Registration Number 0225U004601, (0124U004242) , R & D reports Title Key aspects of the interaction of plasma with surfaces in the development of thermonuclear energy popup.stage_title Дослідження фізичних процесів плазмово-поверхневої взаємодії і механізмів утворення пилу під дією газової плазми. Head Harkusha Ihor Ye., Доктор фізико-математичних наук Registration Date 13-12-2025 Organization National Science Center "Kharkiv Institute of Physics and Technology" popup.description1 Experimental simulation studies of the main regularities of the interaction of high-power plasma with surfaces in controlled thermonuclear fusion installations and the development of effective methods of processing and cleaning the walls of the vacuum chamber of thermonuclear reactors. popup.description2 The extreme sequential thermal steady-state and transient energy deposition on the DEMO Plasma-Facing Components (PFCs) causes significant damage to tungsten armor materials. To evaluate their performance under reactor-relevant conditions, ITER-grade tungsten samples (PLANSEE) were exposed to high heat and particle fluxes. Steady-state pre-loading of samples was performed in the Magnum-PSI facilities. Temperature scans (400 K; 500 K; 600 K; 700 K) were performed during successive D - H - D plasma exposures at a fluence of 1027 m−2. The energy of particles reached 40 eV under steady-state plasma loading. After these exposures, high heat flux transient plasma impacts were applied using the quasi-stationary plasma accelerator QSPA Kh-50. The surface heat loads exceeded the melting threshold of tungsten (energy density up to 0.9 MJ/m2, pulse duration of 0.25 ms). The samples were initially at approximately room temperature before the plasma pulse. Surface analysis was conducted using optical microscopy and SEM. Surface melting, the formation of re-solidified layers, and cracking of the sample surface were identified as the main features of the QSPA pulsed hydrogen plasma exposure. Surface modification and crack development led to an increase in the roughness of the exposed surfaces up to 5 times.The erosion behavior of selective laser melting (SLM) tungsten (W) Capillary Porous Structure (CPS) targets filled with lithium (Li) was examined under transient plasma loads in the QSPA Kh-50. Plasma pulses were applied to two CPS targets, one oriented normally and the other inclined relative to the incident plasma stream. Observations of plasma-surface interactions revealed particle ejection from the exposed target, which depended on the energy density of the incoming plasma stream. Post-mortem analysis of the CPS target under oblique plasma exposure revealed erosion at the leading edge, pointing to this region as a critical factor in target resilience. Product Description popup.authors Stanislav S. Herashchenko Yuliia Y. Volkova Yurii V. Kovtun Rostislav O. Pavlichenko Vadim O. Mahlay Serhii M. Maznichenko Mykola B. Dreval Yurii P. Martseniuk Yuliia S. Kulyk popup.nrat_date 2025-12-13 Close