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75 条记录 (耗时 0.029 秒)

    Electron source for ionization with leakage current suppression
    6.
    发明授权
    Electron source for ionization with leakage current suppression 失效
    具有泄漏电流抑制的电离源

    公开(公告)号：US07701123B2

    公开(公告)日：2010-04-20

    申请号：US11301588

    申请日：2005-12-13

    申请人： Gregory J. Wells ,  Edward G. Marquette

    发明人： Gregory J. Wells ,  Edward G. Marquette

    IPC分类号： H01J9/02

    CPC分类号： H01J49/14 ,  H01J3/024 ,  H01J49/08

    摘要： An electron source includes a first electrode, a second electrode, a thermionic element interposed between and electrically isolated from the first electrode and the second electrode, and a guard electrode interposed between and electrically isolated from the first electrode and the second electrode. The thermionic element and the guard electrode may be at substantially the same voltage. Another electron source includes a first electrode, a second electrode, a thermionic element interposed between and electrically isolated from the first electrode and the second electrode, and a thermal expansion component interposed between and electrically isolated from the first electrode and the second electrode. The thermal expansion component may be heated to cause expansion. The heating may be cycled to cause alternating expansion and contraction.

    摘要翻译： 电子源包括插入在第一电极和第二电极之间并且与第一电极和第二电极电绝缘的第一电极，第二电极和热电离元件，以及插入在第一电极和第二电极之间并与之电隔离的保护电极。 热电离元件和保护电极可以处于基本上相同的电压。 另一电子源包括介于第一电极和第二电极之间并与之电隔离的第一电极，第二电极和热电离元件，以及介于第一电极和第二电极之间并与之电隔离的热膨胀组件。 热膨胀部件可能被加热以引起膨胀。 可以循环加热以引起交替的膨胀和收缩。

    Compensating for field imperfections in linear ion processing apparatus
    7.
    发明授权
    Compensating for field imperfections in linear ion processing apparatus 有权
    补偿线性离子处理设备中的场缺陷

    公开(公告)号：US07470900B2

    公开(公告)日：2008-12-30

    申请号：US11342895

    申请日：2006-01-30

    申请人： Gregory J. Wells

    发明人： Gregory J. Wells

    IPC分类号： H01J49/42

    CPC分类号： H01J49/423 ,  H01J49/4255

    摘要： An electrode structure for manipulating ions includes a main electrode and a compensation electrode. An outer surface of the main electrode includes a curved section that includes an apex. An aperture is generally disposed at the apex and extends along a radial center line from the outer surface through a thickness of the main electrode. The compensation electrode is disposed at the radial center line and at a tangent line tangent to the apex. Another electrode structure includes a plurality of main electrodes defining an interior space, and one or more compensation electrodes disposed in the interior space. RF signals may be applied to the main electrodes and to the compensation electrode.

    摘要翻译： 用于操作离子的电极结构包括主电极和补偿电极。 主电极的外表面包括包括顶点的弯曲部分。 孔通常设置在顶点处并且沿着径向中心线从外表面延伸通过主电极的厚度。 补偿电极设置在径向中心线和与顶点相切的切线处。 另一电极结构包括限定内部空间的多个主电极和设置在内部空间中的一个或多个补偿电极。 RF信号可以施加到主电极和补偿电极。

    Microwave excited helium plasma photoionization detector
    8.
    发明授权
    Microwave excited helium plasma photoionization detector 失效
    微波激发氦等离子体光电离检测器

    公开(公告)号：US5086254A

    公开(公告)日：1992-02-04

    申请号：US26934

    申请日：1987-03-17

    申请人： Gregory J. Wells

    发明人： Gregory J. Wells

    IPC分类号： G01N27/66 ,  G01N30/64

    CPC分类号： G01N30/64 ,  G01N27/66 ,  G01N2030/642

    摘要： A photoionization detector for detecting effluents from a gas chromatographic column has a microwave induced helium plasma as the photon source. Since the source plasma may be at atmospheric pressure and need not be sealed, energy loss due to transmission of photons through a window can be eliminated. Use of alternating electromagnetic fields instead of a direct current discharge obviates the problems of anode sputtering.

    摘要翻译： 用于检测来自气相色谱柱的流出物的光电离检测器具有微波诱导的氦等离子体作为光子源。 由于源极等离子体可能处于大气压并且不需要密封，所以可以消除由于通过窗口传输光子而导致的能量损失。 使用交变电磁场代替直流放电消除了阳极溅射的问题。

    High temperature flame jet for gas chromatography
    9.
    发明授权
    High temperature flame jet for gas chromatography 失效
    用于气相色谱的高温火焰喷射

    公开(公告)号：US4999162A

    公开(公告)日：1991-03-12

    申请号：US237266

    申请日：1988-08-26

    申请人： Gregory J. Wells ,  John R. Berg

    发明人： Gregory J. Wells ,  John R. Berg

    IPC分类号： G01N27/62 ,  G01N30/68

    CPC分类号： G01N30/68 ,  G01N27/62

    摘要： A flame detector comprising a ceramic flame jet for use in a high temperature gas chromatography system is disclosed. The interior volume of the flame jet is fabricated of a highly inert ceramic material so that sample eluting from the end of a gas chromatography column located within the interior volume of the flame jet does not contact any metallic surface en route to the flame. By avoiding sample contact with metallic surfaces, interferences which are prone to occur at high temperature, such as peak tailing, are avoided. In a further aspect the flame detector is treated with a silylating reagent to further passivate the surfaces which may affect the sample.

    Flow contoured electron capture detector cell
    10.
    发明授权
    Flow contoured electron capture detector cell 失效
    流动轮廓电子捕获检测器单元

    公开(公告)号：US4684807A

    公开(公告)日：1987-08-04

    申请号：US733854

    申请日：1985-05-13

    申请人： Gregory J. Wells

    发明人： Gregory J. Wells

    IPC分类号： G01N27/66 ,  G01N30/64

    CPC分类号： G01N27/66 ,  G01N2030/642

    摘要： A small volume electron capture detector has a cylindrical cell 120 inside which there is provided a generally funnel-shaped insert structure 130 having a cup-shaped section and a cylindrical section. The rims of the cup-shaped section nearly touch the inner walls of the cell 120 so as to separate the active volume from the areas at the top corners of the cell 120 which are not actively swept by the carrier gas, thus reducing the tailing of chromatographic peaks.

    摘要翻译： 小体积电子捕获检测器具有圆柱形单元120，在该圆柱形单元120内设置有具有杯状部分和圆柱形部分的大致漏斗形插入结构130。 杯形部分的边缘几乎接触电池单元120的内壁，以将有效体积与电池120的顶角处的区域分开，这些区域不被载气气动地扫过，因此减少了 色谱峰。