Detailed Information on Publication Record
2014
On periodic oscillations observed on cathode voltage and discharge current during HIPIMS process
KLEIN, Peter, Jaroslav HNILICA and Petr VAŠINABasic information
Original name
On periodic oscillations observed on cathode voltage and discharge current during HIPIMS process
Authors
KLEIN, Peter (703 Slovakia, belonging to the institution), Jaroslav HNILICA (203 Czech Republic, belonging to the institution) and Petr VAŠINA (203 Czech Republic, guarantor, belonging to the institution)
Edition
Fifth International Conference on HIPIMS, 2014
Other information
Language
English
Type of outcome
Konferenční abstrakt
Field of Study
10305 Fluids and plasma physics
Country of publisher
United Kingdom of Great Britain and Northern Ireland
Confidentiality degree
není předmětem státního či obchodního tajemství
RIV identification code
RIV/00216224:14310/14:00074183
Organization unit
Faculty of Science
Keywords in English
HIPIMS; oscillations; cathode voltage; discharge current
Tags
International impact
Změněno: 12/12/2014 13:14, doc. Mgr. Jaroslav Hnilica, Ph.D.
Abstract
V originále
HiPIMS is promising technique for depositing thin layers. Instabilities accompanying HiPIMS also known as spokes were firstly observed independently by Anders et al and Kozyrev et al. Since then, OES and Langmuir probes are usually used for spoke diagnostics. In our research, periodic oscillations were not only observed on OES, but also on cathode voltage and discharge current. Alcatel SCM 650 sputtering system equipped with 20 cm titanium target and balanced magnetic field configuration was employed. Melec SIPP 2000 HiPIMS generator with maximum allowed voltage of 1000 V and maximum allowed current of 500 A was used. The generator was operated in constant voltage mode; discharge duration was 200 us with repetition frequency of 50 Hz. When the discharge current overreached typically 250 A, the periodic oscillations of discharge current and cathode voltage with frequency around 350 kHz were observed. Amplitude of the current oscillations was around 25 A, amplitude of the voltage oscillations was around 400 V. Varying discharge voltage different current time evolutions were obtained. However, the actual frequency of oscillations depended always on actual discharge current. This behavior is in contrary with behavior observed by Winter et al. With the increasing pressure the frequency of oscillations also increases. This result agrees with observations of Ehiasarian et al. Aforementioned results lead us to conclusion that observed oscillations of electrical quantities are another, yet not described manifests of the spoke phenomenon.
Links
| ED2.1.00/03.0086, research and development project |
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| GAP205/12/0407, research and development project |
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