公开(公告)号：US20140183349A1

公开(公告)日：2014-07-03

申请号：US13728967

申请日：2012-12-27

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Jonna Flores ,  Luke Perkins

IPC: H01J27/20

CPC classification number: H01J27/205

Abstract: An ion source for use in a radiation generator tube includes a back passive cathode electrode, a passive anode electrode downstream of the back passive cathode electrode, a magnet adjacent the passive anode electrode, and a front passive cathode electrode downstream of the passive anode electrode. The front passive cathode electrode and the back passive cathode electrode define an ionization region therebetween. At least one Spindt cathode is configured to emit electrons into the ionization region. The back passive electrode electrode and the passive anode electrode, and the front passive cathode electrode and the passive anode electrode, have respective voltage differences therebetween, and the magnet generates a magnetic field, such that a Penning-type trap is produced to confine the electrons to the ionization region. At least some of the electrons in the ionization region interact with an ionizable gas to create ions.

Abstract translation: 用于辐射发生器管的离子源包括后无源阴极电极，位于后无源阴极电极下游的无源阳极电极，与被动阳极电极相邻的磁体和在被动阳极电极下游的前被动阴极电极。 前无源阴极电极和后无源阴极电极在其间限定电离区域。 至少一个Spindt阴极被配置为向电离区域发射电子。 后无源电极电极和被动阳极电极以及前被动阴极电极和被动阳极电极之间具有各自的电压差，并且磁体产生磁场，使得产生Penning型阱以限制电子 到电离区域。 电离区域中的至少一些电子与可电离气体相互作用以产生离子。