Title of article
Development of alloy-film coated dispenser cathode for terahertz vacuum electron devices application
Author/Authors
R.K. Barik، نويسنده , , A. Bera، نويسنده , , R.S. Raju، نويسنده , , A.K. Tanwar، نويسنده , , I.K. Baek، نويسنده , , S.H. Min، نويسنده , , O.J. Kwon، نويسنده , , M.A. Sattorov، نويسنده , , K.W. Lee، نويسنده , , G.-S. Park، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2013
Pages
6
From page
817
To page
822
Abstract
High power terahertz vacuum electron devices demand high current density and uniform emission dispenser cathode. It was found that the coating of noble metals e.g., Os, Ir, and Re on the surface of tungsten dispenser cathodes enhances the emission capabilities and uniformity. Hence metal coated cathode might be the best candidate for terahertz devices applications. In this study, ternary-alloy-film cathode (2Os:2Re:1 W) and Os coated cathode have been developed and the results are presented. The cathodes made out of this alloy coating showed 1.5 times higher emission and 0.02 eV emission uniformity as compared to those of simply Os coated cathodes which can be used in terahertz devices application.
Keywords
Thermionic emission microscope (THEM) , Auger electron spectroscopy (AES) , Dispenser cathode , Os coated cathode , Ternary-alloy coated cathode
Journal title
Applied Surface Science
Serial Year
2013
Journal title
Applied Surface Science
Record number
1007279
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