We have developed high-current density field emission sources using arrays of multi-walled carbon nanotube bundles as electron sources required for THz vacuum tube sources. We have found that the arrays of 1-/spl mu/m and 2-/spl mu/m diameter nanotube bundles spaced 5 /spl mu/m apart (edge-to-edge spacing) form the most optimum combination, routinely producing 1.5 to 1.8 A/cm/sup 2/ at low electric fields of approximately 4 V//spl mu/m, rising to > 6 A/cm/sup 2/ at 20 V//spl mu/m over a /spl sim/ 100-/spl mu/m-diameter area. We have found that the field emission performance depends strongly on the bundle diameter and interbundle spacing and such arrays perform significantly better in field emission than other arrangements of nanotubes previously reported in literature.


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    Titel :

    Carbon nanotube bundle-based cold cathodes for THz tube sources


    Beteiligte:
    Manohara, H.M. (Autor:in) / Bronikowski, M.J. (Autor:in) / Hunt, B.D. (Autor:in) / Siegel, P.H. (Autor:in) / Dean, K.A. (Autor:in) / Tisinger, L.H. (Autor:in) / Johnson, S.V. (Autor:in)


    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    2066766 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    MB4-5 KEYNOTE ADDRESS: Carbon Nanotube Bundle-Based Cold Cathodes for THz Tube Sources

    Manohara, H. M. / Bronikowski, M. J. / Hunt, B. D. et al. | British Library Conference Proceedings | 2005


    Testing of Carbon Nanotube Field Emission Cathodes

    Gasdaska, Charles / Falkos, Paul / Robin, Michael et al. | AIAA | 2004


    An Experimental Study on Carbon Nanotube Cathodes ...

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