公开(公告)号：US4988869A

公开(公告)日：1991-01-29

申请号：US396888

申请日：1989-08-21

Applicant: William Aberth

Inventor： William Aberth

IPC: H01J37/06 ,  H01J49/26 ,  H01J49/28

CPC classification number: H01J49/0054 ,  H01J37/06 ,  H01J49/26 ,  H01J49/288

Abstract: A tandem mass spectrometer includes an ion source, a first mass analyzer, a second mass analyzer, and a detector. An electron focusing source is provided between the first mass analyzer and the second mass analyzer in order to provide for dissociation of a parent ion beam into a plurality of daughter ion beams. In a first embodiment, the focused electron source comprises a cylindrical cathode having a concentric cylindrical anode in its interior. Control of the cathode temperature and the potential between the cathode and the anode provides a desired electron flux along the axis of the source. The second embodiment, the desired electron flux is provided by a field emission electrode.

Abstract translation: 串联质谱仪包括离子源，第一质量分析器，第二质量分析器和检测器。 在第一质量分析器和第二质量分析器之间提供电子聚焦源，以提供母离子束分解成多个子离子束。 在第一实施例中，聚焦电子源包括在其内部具有同心圆柱形阳极的圆柱形阴极。 阴极温度和阴极和阳极之间的电势的控制提供了沿源的轴线所需的电子通量。 第二实施例中，期望的电子通量由场发射电极提供。

公开(公告)号：US4851669A

公开(公告)日：1989-07-25

申请号：US201668

申请日：1988-06-02

Applicant: William Aberth

Inventor： William Aberth

IPC: H01J49/16 ,  H01J49/32

CPC classification number: H01J49/0068

Abstract: A tandem mass spectrometer includes an ion source, a first mass analyzer, a microchannel collision plate, a second mass analyzer, and a detector. The microchannel collision plate comprises a matrix defining a plurality of microchannels which are disposed in a generally parallel orientation with a beam of parent ions emanating from the first mass analyzer. Collision of the parent ions with the internal surfaces of the microchannels causes the parent ions to dissociate into daughter ions. The second mass analyzer distinguishes between various mass fractions of the daughter ions, allowing the detector to quantitate said fractions and produce a mass spectra of the material being analyzed.

Abstract translation: 串联质谱仪包括离子源，第一质量分析器，微通道碰撞板，第二质量分析器和检测器。 微通道碰撞板包括限定多个微通道的矩阵，该多个微通道以与第一质量分析器发出的母体离子束大致平行的方向设置。 母离子与微通道内表面的碰撞导致母体离子离解成子离子。 第二质谱分析仪区分子离子的各种质量分数，允许检测器定量所述级分并产生被分析材料的质谱。