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).
Assembling x-ray sources by carbon nanotubes - art. no. 65910M / V., Sessa; M., Lucci; F., Toschi; S., Orlanducci; E., Tamburri; A. L., Terranova; Ciorba, Alessandro; Rossi, Marco; Hampai, Dariush; G., Cappuccio. - STAMPA. - 6591:(2007), pp. 65910M/1-65910M/8. (Intervento presentato al convegno Conference on Nanotechnology III tenutosi a Maspalomas, SPAIN nel MAY 02-04, 2007) [10.1117/12.721961].
Assembling x-ray sources by carbon nanotubes - art. no. 65910M
CIORBA, ALESSANDRO;ROSSI, Marco;HAMPAI, DARIUSH;
2007
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).I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.