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A vacuum-sealed miniature X-ray tube based on carbon nanotube field emitters

Sung Hwan Heo12, Hyun Jin Kim1, Jun Mok Ha1 and Sung Oh Cho1*

Author Affiliations

1 Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea

2 Particla Co., Ltd, Daejeon, 305-701, Republic of Korea

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Nanoscale Research Letters 2012, 7:258  doi:10.1186/1556-276X-7-258

Published: 17 May 2012


A vacuum-sealed miniature X-ray tube based on a carbon nanotube field-emission electron source has been demonstrated. The diameter of the X-ray tube is 10 mm; the total length of the tube is 50 mm, and no external vacuum pump is required for the operation. The maximum tube voltage reaches up to 70 kV, and the X-ray tube generates intense X-rays with the air kerma strength of 108 Gy·cm2 min−1. In addition, X-rays produced from the miniature X-ray tube have a comparatively uniform spatial dose distribution.