Use of ion processing to improve the quality of fullerene-coated field emitters |
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Authors: | T A Tumareva G G Sominskii I A Svetlov I S Panteleev |
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Institution: | 1.St. Petersburg State Polytechnical University,St. Petersburg,Russia |
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Abstract: | The efficiency of tip field emitters covered by activated fullerene coatings is studied in a wide range of emission currents
and residual gas pressures. Main mechanisms behind the influence of the gaseous medium and ion bombardment on the emitter
efficiency are determined. The feasibility of improving the homogeneity of the fullerene coating by potassium ion bombardment
is demonstrated. From data on the emitter performance in a technical vacuum, a previously unknown effect is discovered: the
structure of activated fullerene coatings is reproduced under intense ion bombardment. It is found that intense bombardment
by residual gas ions increases a limiting current extracted from fullerene-coated tip field emitters. |
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