| Autor: |
S.S. Herashchenko, V.A. Makhlai, I.E. Garkusha, Yu.V. Petrov, N.N. Aksenov, O.V. Byrka, V.V. Cheboratev, N.V. Kulik, V.V. Staltsov, P.B. Shevchuk, T.W. Morgan |
| Rok vydání: |
2023 |
| Předmět: |
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| Zdroj: |
Fusion Engineering and Design. 190:113527 |
| ISSN: |
0920-3796 |
| Popis: |
This work presents experimental studies of plasma surface interactions (PSIs) during QSPA plasma impacts on the Sn Capillary Porous Structures (CPSs) in conditions, simulating disruption and ELM-like loads. The 3D tungsten target filled by Sn was exposed to the plasma streams with an energy density of up to 3 MJ/m2 which resulted in tungsten melting and evaporation. The initial temperature of a sample between plasma pulses had two options: remained at a room value for one sample, and reached 300 C which is close to Sn melting point for another one. The number of plasma irradiations reached 100 pulses. It is shown that the particle ejection was observed during PSI for pre-heated as well as cold CPS targets. The difference in values of the number of particles ejected from the targets, their velocities, and the start-time during exposition is discussed. Particles leave the target surface during all expositional pulses for both CPS targets. The threshold character of the ejection is more pronounced for the cold target. After the 100 pulses reduced Sn pool is observed. Moreover, areas without Sn occur on the exposed targets. Nevertheless, the severe damage of the W base of the CPS targets is not revealed during high-cycle powerful plasma loads. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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