THEORETICAL STUDY OF SMALL GAPS ELECTRICAL DISCHARGE BEHAVIOUR
Abstract
THEORETICAL PREDICTIONS ARE GIVEN OF THE DEVELOPMENT OF THE BREAKDOWN MECHANISMS AND OF THE FORMATION OF CATHODE AND ANODE REGIONS IN SMALL GAPS AT HIGH (760 TORRS) AND LOW (50 TORRS) PRESSURE. THE APPLIED FIELD IS DETERMINED BY THE ELECTRODE GEOMETRY AND THE EVOLUTION OF POSITIVE AND NEGATIVE IONS AND ELECTRONS ISDESCRIBED BY ONE-DIMENSIONAL CONTINUITY EQUATION IN CONJUCTION WITH THE POISSON'S EQUATIONS WHICH ARE RESOLVED BY AN ACCURATE NUMERICAL METHOD. THE EFFECTS OF IONIZATION, RECOMBINATION, ATTACHMENT AND ION SECONDARY-ELECTRON EMISSION FROM THE CATHODE ARE ALL INCLUDED. THE RESULTS OBTAINED AGREE SATISFACTORILY WITH EXPERIMENTAL VALUES. THE MAIN MECHANISM OF BREAKDOWN IS THAT OF THE STREAMER AND THE FEATURES OF HIS FORMATION CAN BE UNDERSTOOD BY NOTING THAT ANY CHANGE IN THE ELECTRIC FIELD IN N2 AND IN ATMOSPHERIC AIR CAUSES ABRUPT CHANGES IN THE ELECTRON DENSITY DUE TO EITHER STRONG NET ATTACHMENT OR STRONG NETIONIZATION WHICH BALANCE AT THE CRITICAL ELECTRIC FIELD . IN THE STR ...
show more
Download full text in PDF format (5.05 MB)
(Available only to registered users)
|
All items in National Archive of Phd theses are protected by copyright.
|
Usage statistics
VIEWS
Concern the unique Ph.D. Thesis' views for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
ONLINE READER
Concern the online reader's opening for the period 07/2018 - 07/2023.
Source: Google Analytics.
Source: Google Analytics.
DOWNLOADS
Concern all downloads of this Ph.D. Thesis' digital file.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.
USERS
Concern all registered users of National Archive of Ph.D. Theses who have interacted with this Ph.D. Thesis. Mostly, it concerns downloads.
Source: National Archive of Ph.D. Theses.
Source: National Archive of Ph.D. Theses.