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Proceedings Paper

Dynamic processes on a surface of iridium field emitters produced by the actions of high temperature and electric field
Author(s): O. L. Golubev; Vladimir N. Shrednik
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Paper Abstract

Field evaporation of Ir field emitters at high temperatures T and electric fields F was studied by means of field electron, ion and desorption microscopy. An initial emission of Ir-ions was observed only from the angles of build up emitters at relatively low F. The rise of F in 1.5 times in comparison with build up stage led to formation of microprotrusions. These microprotrusions moved along the edges between the angles of Ir-single crystal and played role of the centers of nucleation of new crystal layers. The macrooutgrowths on the close- packed planes were produced by field crystal growth and there were microprotrusions always on the corners of macrooutgrowths. Field evaporation of macrooutgrowths took place at definite T and F. This evaporation was observed as `effect of collapsing rings'.

Paper Details

Date Published: 1 May 1994
PDF: 4 pages
Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); doi: 10.1117/12.174563
Show Author Affiliations
O. L. Golubev, A.F. Ioffe Physical-Technical Institute (Russia)
Vladimir N. Shrednik, A.F. Ioffe Physical-Technical Institute (Russia)


Published in SPIE Proceedings Vol. 2259:
XVI International Symposium on Discharges and Electrical Insulation in Vacuum
Gennady A. Mesyats, Editor(s)

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