Open AccessInvestigation of the Arc-Anode Attachment Area by Utilizing a High-Speed Camera
Author(s) -
Peter Ondáč,
A. Mašláni,
Milan Hrabovský
Publication year - 2016
Publication title -
plasma physics and technology
Language(s) - English
Resource type - Journals
eISSN - 2336-2634
pISSN - 2336-2626
DOI - 10.14311/ppt.2016.1.1
Subject(s) - anode , arc (geometry) , plasma , cathode , dwell time , materials science , plasma arc welding , optics , high speed camera , electric arc , plasma torch , voltage , mechanics , acoustics , electrical engineering , physics , electrode , engineering , mechanical engineering , quantum mechanics , medicine , clinical psychology
The arc-anode attachment in the DC plasma arc influences power distribution in the plasma, a lifespan of anode and flow structure of plasma jet. A movement of the attachment and the surrounding plasma was directly observed by using a high-speed camera (max. 1,080,000 fps). The observations were compared with cathode-anode voltage measurements (sample rate 80 MHz). We have directly measured the average velocity of the attachments and hydrodynamic waves above them, as well as the characteristic dwell times and dwell frequencies of the attachments.