LASER PROBING OF AIR GAPS UNDER AC CONDITIONS

Autor:	A.-R. M. Zaghloul, M. Elshazly-Zaghloul, E. Aboul Zahab
Rok vydání:	1987
Předmět:	Amplitude Optics Materials science Ellipsometry business.industry Phase (waves) High voltage Laser probing Dielectric Air gap (plumbing) business Voltage
DOI:	10.1016/b978-0-08-034693-9.50036-8
Popis:	We introduce a novel method to probe an air gap under ac conditions. A laser beam is passed through the gap and amplitude and phase changes of the electric vector of the laser beam is measured by ellipsometry. The measuring circuit is completely independent of the high voltage energizing circuit. Expressions to obtain the dielectric constant of the gas within the gap are presented. Experimental results on two gap geometries at different gap lengths are presented. Temporal development of the gap is continuously monitored and obtained results are given. The reported measurements are highly accurate. Discussion of the results provides a brief explanation of the gap changes at different energizing high voltages.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::780a0339501e7874c915293f90fac1dc https://doi.org/10.1016/b978-0-08-034693-9.50036-8 Zobrazit plný text záznamu