Control of reduced electric field in the positive column of a pulsed discharge in CO₂

• Видавець: Національний науковий центр «Харківський фізико-технічний інститут» НАН України
• Дата: 2023
• Автори: Lisovskiy, V.A., Dudin, S.V., Vusyk, M.M., Osmayev, R.O., Yegorenkov, V.D., Platonov, P.P.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2023
• Назва видання: Problems of Atomic Science and Technology
• Теми: Low temperature plasma and plasma technologies
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/196036
• Цитувати: Control of reduced electric field in the positive column of a pulsed discharge in CO₂ / V.A. Lisovskiy, S.V. Dudin, M.M. Vusyk, R.O. Osmayev, V.D. Yegorenkov, P.P. Platonov // Problems of Atomic Science and Technology. — 2023. — № 1. — С. 86-91. — Бібліогр.: 19 назв. — англ.

The electric field strength in the positive column of dc and bipolar pulsed discharges in carbon dioxide was de-termined by the method of moving electrodes. It is shown that an increase in the frequency of the pulse voltage leads to the electric field strength increase. The following values of the reduced electric field E/p for a gas pressure of 0.5 Torr were obtained: 22.5 V/(cm·Torr) for dc discharge, 30 V/(cm·Torr) for pulsed discharge at 20 kHz for low-current mode and 32 V/(cm·Torr) for high-current mode, and 36.6 V/(cm·Torr) for 75 kHz. We see that in the dc discharge, the reduced electric field is weak, due to which the exchange of vibrational energy between CO₂ mole-cules dominates the conversion process. The increase of the electric field strength in the positive column of a pulsed discharge, especially under conditions of gas heating, allows obtaining E/N > 100 Td when the process of direct dissociation of CO₂ molecules by fast electrons makes the main contribution to the conversion process.