Vol.2, No 5, 2003 pp. 259 - 267
UDC 537.52; 533.9
THE GLOW DURATION TIME INFLUENCE
ON THE IONIZATION RATE DETECTED IN THE DIODES
FILLED WITH NOBLE GASES ON mbar PRESSURES
Olivera M. Stepanović, Miodrag K. Radović1,
Čedomir A. Maluckov2
Institute of Experimental Physics II, Ruhr-University Bochum, 44780
Bochum, Germany
1Faculty of Science and Mathematics,
P.O. Box 224, 18001 Niš, Serbia and Montenegro
2Technical Faculty in Bor, University
of Belgrade, Vojske Jugoslavije 12, 19210 Bor, Serbia and Montenegro
Abstract. The results of the glow current duration time (glowing-time)
influence on the ionization rate detected in the gas filled diodes are
presented. The electrical breakdown was detected as the minimal current
impulse. After that diode glow from the minimal glowing-time (10-3
s), up to the maximal 103 s, which overlap
the time of the stationary regime formation in the gas diode tube. The
diodes were with volumes of 300 cm3, but
with a diode gap volume of about 1 cm3 and filled with helium,
neon, argon or krypton, at the pressures of the order of mbar. The ionization
rates were detected as the residual ionization after the glowing was interrupted,
using the electrical breakdown time delay measuring method. The influence
of the gap distance, stationary current values and the relaxation period
were also investigated. The result shows that the stationary regime in
such a gas diode is established after the glowing time of 1-3 s, although
the breakdown formative times were smaller then 1 ms.
Key words: gas discharges,ionization rate, time delay
ISPITIVANJE UTICAJA VREMENA GORENJA
NA DETEKTOVANU BRZINU JONIZACIJE U DIODAMA
PUNJENIM PLEMENITIM GASOVIMA
NA PRITISCIMA REDA mbar
U ovom radu su prikazani rezultati ispitivanja uticaja vremena gorenja
na detektovanu brzinu jonizacije u gasnim diodama punjenim plemenitim gasovima.
Električni proboj je detektovan na osnovu minimalnog strujnog impulsa kroz
diodu. Vreme gorenja je varirano od 10-3
s do vrednosti od 103 s. Gasne diode su
punjene helijumom, neonom, argonom i kriptonom, na pritiscima reda mbar.
Njihove zapremine su iznosile oko 300 cm3,
sa zapreminom međuelektrodnog prostora oko 1 cm3. Brzina jonizacije
u cevi je bila detektovana merenjem vremena kašnjenja električnog proboja.
Ispitivan je uticaj međuelektrodnog rastojanja, vrednosti stacionarne struje
i vremena relaksacije na brzinu jonizacije. Rezultati pokazuju da se stacionarni
režim rada gasne diode ostvaruje nakon vremena gorenja od 1 do 3 sekunde,
dok je vreme formiranja pražnjenja bilo manje od 1 ms.
