title: A vacuum-sealed miniature X-ray tube based on carbon nanotube field emitters.
abstract: 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.
authors.affiliation: Department of Nuclear and Quantum Engineering, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea. socho@kaist.ac.kr.
authors.forename: Sung Hwan
authors.initials: SH
authors.lastname: Heo
authors.forename: Hyun Jin
authors.initials: HJ
authors.lastname: Kim
authors.forename: Jun Mok
authors.initials: JM
authors.lastname: Ha
authors.forename: Sung Oh
authors.initials: SO
authors.lastname: Cho