公开(公告)号：US6044129A

公开(公告)日：2000-03-28

申请号：US975727

申请日：1997-11-21

Applicant: Lester D. Miller ,  James E. Burke ,  Donald F. Decou, Jr.

Inventor： Lester D. Miller ,  James E. Burke ,  Donald F. Decou, Jr.

IPC: H01J35/04 ,  H01J35/20

CPC classification number: H01J35/20 ,  H01J35/04

Abstract: An x-ray tube includes an anode, a cathode, and an electrode disposed in an evacuated envelope. The electrode is positioned such that the electrode is remote from an area in immediate proximity to the envelope. An electric field defined by electrode is of sufficient strength such that arcing preferentially occurs between the electrode and the anode as opposed to occurring between the cathode and anode. The electrode is further situated such that metal sputtered from the electrode substantially falls in a define region on the anode and serves as an active getter for pumping gas from the envelope. The electrode is composed of an active metal which, upon being passively heated by the anode, also acts as a getter material to aid in pumping gas from the envelope.

Abstract translation: X射线管包括阳极，阴极和设置在抽真空的外壳中的电极。 电极被定位成使得电极远离紧邻信封的区域。 由电极限定的电场具有足够的强度，使得在电极和阳极之间优先发生电弧，而不是发生在阴极和阳极之间。 电极进一步定位成使得从电极溅射的金属基本上落在阳极上的限定区域中，并且用作用于从封套泵送气体的主动吸气剂。 电极由活性金属组成，其在被阳极被动加热时也用作吸气剂材料以有助于从封套泵送气体。

公开(公告)号：US4017757A

公开(公告)日：1977-04-12

申请号：US646091

申请日：1976-01-02

Applicant: Donald F. DeCou, Jr.

Inventor： Donald F. DeCou, Jr.

IPC: H01J35/04 ,  H01J35/18 ,  H01J35/32 ,  H01J35/00

CPC classification number: H01J35/04 ,  H01J35/18 ,  H01J35/32

Abstract: An X-ray tube comprising an evacuated envelope having therein a plurality of anode target materials suitably disposed for bombardment by respective electron beams, either simultaneously or alternatively, each of the electron beams being independently variable with respect to one another.

Abstract translation: 一种包括真空外壳的X射线管，其中具有适当地设置用于通过各个电子束轰击的多个阳极靶材料，或者同时或可替换地，每个电子束可相对于彼此独立地变化。