Details

Autor(en) / Beteiligte

• Cheng, Yuan
• Zhang, J
• Lu, J P
• Gao, B
• Lee, Y Z
• Lin, W
• Dike, S
• Zhou, Otto

Titel

Dynamic x-ray radiography using a carbon-nanotube(CNT) based field-emission micro-focus x-ray source

Ist Teil von

• Bulletin of the American Physical Society, 2004-03, Vol.49 (1)

Erscheinungsjahr

2004

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Dynamic x-ray radiography can provide time-resolved structural information which is important for understanding materials processing and chemical reactions. Here we report a dynamic radiography system using a triode-type field-emission x-ray source with the CNTs as the cathode. The system can readily generate x-ray radiation with continuously variation of the pulse-width ( > 60 nanosecond) and repetition rate up to 100 kHz. A spatial resolution of 50 um was achieved. We presents the field-emission characteristics of the CNT cathode, which demonstrates a high current-density and low threshold electric field. The potential applications of the dynamic radiography system in biological processes and for non-destructive evaluation are also discussed.