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22 May 2007 Assembling x-ray sources by carbon nanotubes
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Abstract
By the use of a chemical vapour deposition technique a series of metal wires (W, Ta, Steel ) with differently shaped tips have been coated by arrays of single wall carbon nanotubes (SWNT). The field emission properties of the SWNT deposits have been measured by a home made apparatus working in medium vacuum (10-6- 10-7 mbar) and the SWNT-coated wires have been used to fabricate tiny electron sources for X-ray tubes. To check the efficiency of the nanotube coated wires for X-ray generation has, a prototype X-ray tube has been designed and fabricated. The X-ray tube works at pressures about 10-6 mbar. The target ( Al film) is disposed on a hole in the stainless steel sheath: this configuration makes unnecessary the usual Be window and moreover allows us to use low accelerating potentials (< 6 kV).
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V. Sessa, M. Lucci, F. Toschi, S. Orlanducci, E. Tamburri, M. L. Terranova, A. Ciorba, M. Rossi, D. Hampai, and G. Cappuccio "Assembling x-ray sources by carbon nanotubes", Proc. SPIE 6591, Nanotechnology III, 65910M (22 May 2007); doi: 10.1117/12.721961; https://doi.org/10.1117/12.721961
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