EFFICIENCY OF COPPER AND GOLD CATHODE IN INITIATION OF SECONDARY-EMISSION IN NITROGEN-FILLED TUBE

Authors
PEJOVIC MM MARKOVIC VL RISTIC GS MEKIC SI
Citation
Mm. Pejovic et al., EFFICIENCY OF COPPER AND GOLD CATHODE IN INITIATION OF SECONDARY-EMISSION IN NITROGEN-FILLED TUBE, Vacuum, 48(6), 1997, pp. 531-534
Citations number
23
Categorie Soggetti
Physics, Applied
Journal title
Vacuum → ACNP
ISSN journal
0042207X
Volume
48
Issue
6
Year of publication
1997
Pages
531 - 534
Database
ISI
SICI code
0042-207X(1997)48:6<531:EOCAGC>2.0.ZU;2-C
Abstract
The efficiency of secondary electron emission induced by ions and atom s remaining from previous discharge during the initiation of electrica l breakdown in a nitrogen-filled tube with bulk copper and gold plated electrodes has been investigated. This investigation was done by meas uring the electrical breakdown time delay as a function of afterglow p eriod tau, glow current i(g) and electrode gap d. The results show tha t the gold plated cathode is more efficient in secondary electron emis sion caused by nitrogen atom impact on its surface than that of bulk c opper. This phenomenon can be explained by different adsorption abilit y of nitrogen atoms on the copper and gold surface. (C) 1997 Published by Elsevier Science Ltd. All rights reserved.