Damaging of pure tungsten with different microstructure under sequential QSPA and LHD plasma loads

• Дата: 2020
• Автори: Herashchenko, S.S., Byrka, O.V., Makhlaj, V.A., Wirtz, M., Aksenov, N.N., Garkusha, I.E., Petrov, Yu.V., Malykhin, S.V., Surovitskiy, S.V., Masuzaki, S., Tokitani, M., Lebedev, S.I., Shevchuk, P.B.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2020
• Назва видання: Вопросы атомной науки и техники
• Теми: Plasma dynamics and plasma-wall interaction
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/194648
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Damaging of pure tungsten with different microstructure under sequential QSPA and LHD plasma loads / S.S. Herashchenko, O.V. Byrka, V.A. Makhlaj, M. Wirtz, N.N. Aksenov, I.E. Garkusha, Yu.V. Petrov, S.V. Malykhin, S.V. Surovitskiy, S. Masuzaki, M. Tokitani, S.I. Lebedev, P.B. Shevchuk // Problems of atomic science and tecnology. — 2020. — № 6. — С. 78-82. — Бібліогр.: 17 назв. — англ.

The cracking thresholds were evaluated for tungsten samples with different microstructure in the course of QSPA Kh – 50 repetitive plasma loads. No damage has been observed on the exposed surfaces under 0.1 MJ/m². Nevertheless, cracks were detected in the bulk of irradiated tungsten (with longitudinal grain orientation). Increasing heat load up to 0.2 MJ/m² caused the damaging of all types of tungsten targets. The observed cracks propagate to the bulk mainly transversely and parallel to the irradiated surface. The effect of the subsequent exposure with LHD divertor plasma on the tungsten samples was analyzed. The obtained results are discussed.