Dynamic processes on a surface of iridium field emitters produced by the actions of high temperature and electric field

O. L. Golubev; Vladimir N. Shrednik

doi:10.1117/12.174563

1 May 1994 Dynamic processes on a surface of iridium field emitters produced by the actions of high temperature and electric field

O. L. Golubev, Vladimir N. Shrednik

Author Affiliations +

Proceedings Volume 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum; (1994) https://doi.org/10.1117/12.174563
Event: XVI International Symposium on Discharges and Electrical Insulation in Vacuum, 1994, Moscow-St. Petersburg, Russian Federation

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'.

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O. L. Golubev and Vladimir N. Shrednik "Dynamic processes on a surface of iridium field emitters produced by the actions of high temperature and electric field", Proc. SPIE 2259, XVI International Symposium on Discharges and Electrical Insulation in Vacuum, (1 May 1994); https://doi.org/10.1117/12.174563

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