Vpliv vključkov v materialu elektrod na njihovo vedenje v močnem električnem polju

slovenian

1995

volume 29, issue 1/2

Electronika 

Inštitut za kovinske materiale in tehnologije

Stable operation of electro-optical system in high vacuum is mainly dependent on electrode surface condition. In strong electric field, several surface phenomena can arise: field emission, surface charging of dielectric particles, ionization and finally break down or arching. The most important step in electrode's surface preparation before switching on the high voltage is called conditioning, when surface defects, which are responsible for undesired phenomena, are destroyed. All other manufacturing steps are nearly of same importance, starting from material selection, mechanical treatment and cleaning. Edges of electrodes, from which field emission have arised, were inspected by scanning electron microscope and electron microanalyzer after chemical etching. Microinclusions of titanium carbide were found which could be responsible for fied emission and inefficient high voltage conditioning. Some test electrodes were prepared with golden layer in order to diminish influence of carbide inclusions. Improved characteristics of high voltage gap were observed.

22.07.2011