公开(公告)号：US20030002627A1

公开(公告)日：2003-01-02

申请号：US10224008

申请日：2002-08-20

Applicant: Oxford Instruments, Inc.

Inventor： Robert J. Espinosa ,  Bradley W. Boyer ,  Scott Snyder ,  Majorie L. Munson ,  Ken G. Gorman

IPC: H01J035/06

CPC classification number: B82Y10/00 ,  H01J35/065

Abstract: A cold emitter x-ray tube is provided comprised of a cathode which is a carbon nanotube or nanostructured carbon film which serves as the electron emission source in an x-ray tube, and is positioned on a suitable substrate. The nanostructured carbon film is selected from a group consisting of nanocyrstalline graphite, carbon nanotubes, diamond, diamond like carbon, or a composite of two or more of members of the group. An extraction/suppression grid may be utilized. A metal anode which functions as the x-ray generating target is positioned within the x-ray tube. A high voltage source with negative contact is connected to the emitter and the positive contact connected to the anode target. This single source of high potential serves to provide the electric field, between the emitter and anode, for extraction of electrons from the emitter and to accelerate the electrons to the target for generation of x-rays. X-rays pass through a beryllium window that is an integral part of the vacuum envelope. The x-ray tube may be used for various applications such as portable x-ray spectrometry, portable fluoroscopy, radiation treatment, and the like.

Abstract translation: 提供了一种冷发射器X射线管，其由作为X射线管中的电子发射源的碳纳米管或纳米结构碳膜的阴极组成，并且位于合适的衬底上。 纳米结构碳膜选自由纳米结构石墨，碳纳米管，金刚石，类金刚石碳组成的组，或组中两个或多个成员的组合。 可以使用提取/抑制网格。 用作X射线产生靶的金属阳极位于X射线管内。 具有负触点的高电压源连接到发射极，正极触点连接到阳极靶。 该单一高电位源用于提供发射极和阳极之间的电场，用于从发射极提取电子，并将电子加速到目标以产生X射线。 X射线通过作为真空外壳的组成部分的铍窗。 X射线管可以用于各种应用，例如便携式x射线光谱法，便携式荧光透视法，放射治疗法等。