公开(公告)号：US6133568A

公开(公告)日：2000-10-17

申请号：US123337

申请日：1998-07-28

申请人： Gerhard Weiss ,  Alfred Kraffert ,  Michael Schubert ,  Jochen Franzen

发明人： Gerhard Weiss ,  Alfred Kraffert ,  Michael Schubert ,  Jochen Franzen

IPC分类号： H01J49/42 ,  H01J49/00 ,  B01D59/44

CPC分类号： H01J49/424 ,  H01J49/068 ,  H01J49/4255

摘要： The invention relates to high performance ion traps used as mass spectrometers which in spite of a variable thermal load require a high constancy of the mass scale calibrated in. Ion traps consist at least of one ring electrode, two end cap electrodes, and suitable fixing elements which determine the distance between the electrodes. When exposed to a thermal load, the parts of the ion trap are subject to thermal expansion, which leads to a change in field intensities even if the applied RF voltage is constant, and thus to an apparant shift of masses. The invention consists of selecting the thermal expansion of the ion trap parts in such a way that when a constant RF voltage is applied, the field intensity within the trap remains constant by first approximation, in spite of the altering geometric form and expansion with changing operating temperature. In this way, displacement of the mass scale is avoided. To compensate an unavoidable thermal expansion .DELTA.r.sub.0 of the ring electrode with an inscribed radius r.sub.0 by a ratio .DELTA.r.sub.0 /r.sub.0, the distance z.sub.0 of the end cap poles from the center of the trap must become smaller by the proportional ratio .DELTA.z.sub.0 /z.sub.0 =-.DELTA.r.sub.0 /r.sub.0. This compensation can be achieved by a suitable design with suitably selected expansion coefficients for the ion trap electrode material and the material of the fixing elements.

摘要翻译： 本发明涉及用作质谱仪的高性能离子阱，尽管可变热负载需要校准的质量标准的高恒定性。离子阱由至少一个环形电极，两个端盖电极和合适的固定元件组成 其确定电极之间的距离。 当暴露于热负荷时，离子阱的部分经受热膨胀，即使所施加的RF电压恒定，导致电场强度的变化，从而导致质量偏移。 本发明包括选择离子阱部件的热膨胀，使得当施加恒定的RF电压时，尽管通过改变操作来改变几何形状和膨胀，但陷阱内的场强保持恒定。 温度。 以这种方式，避免了质量标度的位移。 为了以内切半径r0的比例DELTA r0 / r0来补偿环形电极的不可避免的热膨胀DELTA r0，端盖极距离陷阱中心的距离z0必须按照比例比DELTA z0 / z0变小 = - DELTA r0 / r0。 这种补偿可以通过合适的设计来实现，该设计具有用于离子阱电极材料和固定元件的材料的适当选择的膨胀系数。

公开(公告)号：US5437203A

公开(公告)日：1995-08-01

申请号：US37934

申请日：1993-03-26

申请人： Dieter Koch ,  Gerd Menne ,  Alfred Kraffert ,  Gerhard Weiss ,  Rainer Spudich

发明人： Dieter Koch ,  Gerd Menne ,  Alfred Kraffert ,  Gerhard Weiss ,  Rainer Spudich

IPC分类号： B60B3/08 ,  G01N1/02 ,  H01J49/04 ,  B60B3/00 ,  B60B21/02 ,  G01N27/62

CPC分类号： H01J49/0022 ,  B60B21/02 ,  B60B25/006 ,  B60B3/08 ,  B60B3/14 ,  F41H7/03 ,  G01N1/02 ,  H01J49/0409 ,  G01N2001/028

摘要： The invention concerns a sampling device for a mobile analysis unit, in particular a mass spectrometer (13), used for the purpose of monitoring chemical substances on ground surfaces. It possesses at least one sampling wheel which revolves around an axle and which consists of a silicone tire (5) for picking up molecules of substances to be monitored and a wheel rim (6) upon which the silicone tire is fitted. The wheel rim (6) is made of metal such as stainless steel or aluminum. This means that on the one hand contamination of the silicone tire (5) by vapors from the wheel rims (6), in the course of long-term storage of the sampling wheels in airtight, closed storage containers, is prevented. On the other hand, the invention facilitates an advantageous construction of the wheel rim (6), involving the mounting of two, thin-walled rim halves (9) with rivet holes.

摘要翻译： 本发明涉及用于移动分析单元的取样装置，特别是质谱仪（13），其用于监测地面上的化学物质。 它具有至少一个围绕车轴旋转的采样轮，该采样轮由用于拾取要监测的物质的分子的硅氧烷轮胎（5）和安装硅树脂轮胎的轮辋（6）组成。 轮辋（6）由不锈钢或铝等金属制成。 这意味着，一方面，通过来自车轮轮缘（6）的蒸气使有机硅轮胎（5）的污染在采样轮长期保存在气密的过程中被封闭的储存容器被阻止。 另一方面，本发明有助于轮辋（6）的有利结构，涉及用铆钉孔安装两个薄壁的半边（9）。

公开(公告)号：US5404765A

公开(公告)日：1995-04-11

申请号：US9793

申请日：1993-01-27

申请人： Gerhard Weiss ,  Alfred Kraffert

发明人： Gerhard Weiss ,  Alfred Kraffert

IPC分类号： G01N30/20 ,  G01N30/60 ,  G01N30/72 ,  H01J49/04 ,  F16K51/02 ,  G01N37/00

CPC分类号： H01J49/04 ,  G01N2030/6013 ,  G01N30/20 ,  G01N30/7206

摘要： An ultra-high vacuum valve for the admission of substance mixtures into an analytical measuring instrument limits the flow path of the substances to as small a flow chamber as possible with controllable chamber wall adsorption properties. The elastic wall sections necessary for movement of the valve piston are located in a mechanical chamber separated from the flow chamber by a wall. The mechanical chamber is evacuated by means of a separate vacuum duct and a seal is used to seal the valve piston where it passes through the wall.

摘要翻译： 用于将物质混合物进入分析测量仪器的超高真空阀将物质的流动路径限制为尽可能小的流动室，并具有可控的室壁吸附性能。 阀活塞运动所需的弹性壁部分位于通过壁与流动室分离的机械室中。 通过单独的真空管道将机械室抽真空，并且使用密封件来密封阀活塞，其中它穿过壁。