Bogdan Barwinski - Academia.edu (original) (raw)
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Universidade Federal de Santa Catarina - UFSC (Federal University of Santa Catarina)
Massachusetts Institute of Technology (MIT)
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Papers by Bogdan Barwinski
Applied Surface Science, 1998
The paper describes a procedure of shaping of the surface of tungsten field emitters, which produ... more The paper describes a procedure of shaping of the surface of tungsten field emitters, which produces tips with decreased both extraction voltage and the emitting area in comparison with analogous factors for tungsten tips cleaned by the standard flash heating up to 2300 K. It has been shown, that for prepared in the proposed way tips, field emission occurs mainly from ² : ² : a few spots, which we have found as related to 111 and 100 directions of tungsten crystal. Scanning field emission Ž . microscopy SFEM was proposed as the method testing quality of field emitters. q 1998 Elsevier Science B.V. All rights reserved.
Applied Surface Science, 1998
The paper describes a procedure of shaping of the surface of tungsten field emitters, which produ... more The paper describes a procedure of shaping of the surface of tungsten field emitters, which produces tips with decreased both extraction voltage and the emitting area in comparison with analogous factors for tungsten tips cleaned by the standard flash heating up to 2300 K. It has been shown, that for prepared in the proposed way tips, field emission occurs mainly from ² : ² : a few spots, which we have found as related to 111 and 100 directions of tungsten crystal. Scanning field emission Ž . microscopy SFEM was proposed as the method testing quality of field emitters. q 1998 Elsevier Science B.V. All rights reserved.