Investigation of carbon cathode surface before and after the passage of combined DC vacuum arc with superimposed high-current arc pulses

• Дата: 2016
• Автори: Zavaleyev, V., Walkowicz, J., Moszyński, D.
• Формат: Стаття
• Мова: English
• Опубліковано: Національний науковий центр «Харківський фізико-технічний інститут» НАН України 2016
• Назва видання: Вопросы атомной науки и техники
• Теми: Физика радиационных и ионно-плазменных технологий
• Онлайн доступ: http://dspace.nbuv.gov.ua/handle/123456789/115408
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Investigation of carbon cathode surface before and after the passage of combined DC vacuum arc with superimposed high-current arc pulses / V. Zavaleyev, J. Walkowicz, D. Moszyński// Вопросы атомной науки и техники. — 2016. — № 4. — С. 76-83. — Бібліогр.: 24 назв. — англ.

The paper presents the results of studies of carbon cathode surface before and after the passage of the combined DC vacuum-arc with superimposed high-current arc pulses. Investigations of surface morphology of carbon cathode showed, that secondary nuclei of high-density are formed after passing of the combined DC-pulse vacuum-arc, which results in the formation of a globular structures. The phase structure analysis by Raman spectroscopy showed that even at a minimum operation time (5 s) of the combined DC-pulse vacuum-arc broadening of the peaks 1355 and 1583 cm⁻¹ occurs, which means that the carbon cathode surface undergo phase transformation. Results obtained by XPS spectroscopy demonstrate that the globular structures formed on the cathode surface are composed of sp³-bonded carbon atoms and carbon-oxygen bonds.