Low frequency oscillations in U-2M conditioning RF discharges
MHD oscillations were studied in low magnetic field (B₀ = 0.01 T) radio frequency discharges of the URAGAN-2M (U-2M) stellarator. Coherent oscillations are observed by bolometers, triple Langmuir probe microwave interferometer (140 GHz) and magnetic pick-up coils in different toroidal cross-sectio...
Збережено в:
| Дата: | 2018 |
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| Автори: | , , , , , |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Національний науковий центр «Харківський фізико-технічний інститут» НАН України
2018
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| Назва видання: | Вопросы атомной науки и техники |
| Теми: | |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/148825 |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Low frequency oscillations in U-2M conditioning RF discharges / M.B. Dreval, A.M. Shapoval, A.A. Beletskii, R.O. Pavlichenko, F.I. Ozherel’yev, M.M. Makhov // Вопросы атомной науки и техники. — 2018. — № 6. — С. 42-45. — Бібліогр.: 6 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | MHD oscillations were studied in low magnetic field (B₀ = 0.01 T) radio frequency discharges of the
URAGAN-2M (U-2M) stellarator. Coherent oscillations are observed by bolometers, triple Langmuir probe
microwave interferometer (140 GHz) and magnetic pick-up coils in different toroidal cross-sections of U-2M.
Modified diagnostics show, that the plasma beta (β = nT/(μ₀B²
)) is rather high in these discharges in spite of the low
temperature (Te = 10…50 eV) and density (ne = (0.5…1)∙10¹² cm⁻³
) due to very low magnetic field. Variation of the
magnetic configuration of U-2M substantially modifies fluctuations amplitude, oscillating modes type and
frequency. Rotated m = 2 mode is transformed into the Sawtooth-like oscillations in different magnetic
configurations. Strong dependence on the magnetic configuration indicates that observed in U-2M phenomena can
have similar nature as in stellarator high temperature plasmas. |
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