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    Mass spectrometer with remote ion source
    1.
    发明公开
    Mass spectrometer with remote ion source 失效
    质谱仪具有单独的离子源。

    公开(公告)号：EP0234560A2

    公开(公告)日：1987-09-02

    申请号：EP87102641.5

    申请日：1987-02-25

    申请人： EXTREL FTMS, INC.

    发明人： Ghaderi, Sahba ,  Vorburger, Othmar ,  Littlejohn, Duane P. ,  Shohet, Juda Leon

    IPC分类号： H01J49/38

    CPC分类号： H01J49/38

    摘要： A remote ion source (14) within an ICR mass spectrometer which provides an enhanced trapping (within an analyzer cell (12)) of ions formed within that remote ion source (14). In a preferred embodiment, trapping enhancement is accomplished by means of magnetic perturbations of the magnetic field within the analyzer cell. The perturbations may be established by ferromagnetic means (30) or electromagnetic means (31) or by the use of permanent magnets to form a magnetic bottle. Ions formed within the remote ion source (14) are extracted from that source by an electrostatic lens (16) and directed toward the analyzer cell (12) along the Z axis of the spectrometer magnetic field. Deceleration lenses (37), external to the analyzer cell, may be employed to further enhance the trapping capability of the analyzer cell (12). In some modes of operation, a ramped deceleration potential may be applied to the declaration lens for "grouping" of ions of different masses for analysis. Provision for mass selection is also made within the spectrometer disclosed herein.

    Ion cyclotron resonance spectrometer
    2.
    发明公开
    Ion cyclotron resonance spectrometer 失效
    Ionen-Zyklotronresonanz-光谱仪。

    公开(公告)号：EP0162649A2

    公开(公告)日：1985-11-27

    申请号：EP85303377.7

    申请日：1985-05-14

    申请人： EXTREL FTMS, INC.

    发明人： Littlejohn, Duane P. ,  Ghaderi, Sahba

    IPC分类号： H01J49/38

    CPC分类号： H01J49/38

    摘要： A conductance limit plate 14 divides the vacuum chamber into two portions 30 and 31 which are separately evacuated by pumps 28 and 27, respectively, to maintain molecular flow conditions. Coil 25 generates axial magnetic field B while an ionising electron beam is directed from gun 32 to collector 38. Sample introduced into chamber 31 increases the pressure in this chamber and thus increases the ionization. Orifice 20 of plate 14 is small enough to maintain the pressure differential between the chambers but ions will equilibrate between the chambers, resulting in an increase in the transient decay time in chamber 30 to facilitate excitation and analysis. Trapping plates 10 and 11 trap the ions between the plates by reason of the potential applied to the plates.

    摘要翻译： 电导限制板14将真空室分成两个分别由泵28和27抽真空的部分30和31，以保持分子流动状态。 线圈25产生轴向磁场B，而电离电子束从枪32引导到收集器38.引入腔室31的样品增加了该腔室中的压力，从而增加了电离。 板14的孔20足够小以保持室之间的压力差，但是离子将在室之间平衡，导致室30中的瞬时衰减时间的增加以促进激发和分析。 捕集板10和11由于施加到板上的电位而在板之间捕获离子。