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1.发明授权Method and device for the digital generation of an additional alternating voltage for the resonant excitation of ions in ion traps 失效用于数字生成用于离子阱中的离子的共振激发的附加交流电压的方法和装置
公开(公告)号：US5438195A
公开(公告)日：1995-08-01
申请号：US245956
申请日：1994-05-19
IPC分类号： H01J49/42
CPC分类号： H01J49/424 , H01J49/4285
摘要： A method and a device for the mass selective excitation of the secular oscillations of selected ion types in an RF quadrupole ion trap, including the simultaneous excitation of more than one ion type, is disclosed. The secular oscillation frequency is excited by resonances with specific frequencies of the frequency bands of the additional alternating fields, the frequency bands being generated digitally at a basic pulse rate .OMEGA.. Interfering frequency side bands .OMEGA.-.omega., .OMEGA.+.omega., 2.OMEGA.-.omega., 2.OMEGA.+.omega., etc. arise, however, for each frequency .omega. within the frequency bands. These side bands can excite and eliminate other ions, which are not to be eliminated, in an undesired manner. The invention comprises forming the side bands in such a way that they only excite the selected ions. This is done by making the basic pulse rate for digital generation of the frequency bands for the additional alternating voltage identical with the frequency of the drive voltage of the ion trap or with an integral multiple of it and coupling the basic pulse rate to it in locked phase relation.
摘要翻译： 公开了一种用于在RF四极离子阱中选择性离子类型的长期振荡的质量选择性激发的方法和装置，包括同时激发多于一种的离子型。 通过与附加交变场的频带的特定频率的共振来激发长期振荡频率，频带以基本脉冲速率OMEGA数字地产生。 然而，对于频带内的每个频率ω，出现干扰频率边带OMEGA-ω，OMEGA +ω，2 OMEGA-ω，2 OMEGA +ω等。 这些边带可以以不期望的方式激发和消除不被消除的其它离子。 本发明包括以这样的方式形成侧带，使得它们仅激发所选择的离子。 这是通过使附加交流电压的频带的数字生成的基本脉冲频率与离子阱的驱动电压的频率或其整数倍相同，并将基本脉冲频率与其锁定 相位关系。
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2.发明授权Method and device for in-phase measuring of ions from ion trap mass spectrometers 失效离子阱质谱仪离子同相测量的方法和装置
公开(公告)号：US5386113A
公开(公告)日：1995-01-31
申请号：US996008
申请日：1992-12-23
CPC分类号： H01J49/424 , H01J49/429
摘要： The measuring process for generating mass spectra using a sequentially-scanned quadrupole ion trap mass spectrometer, is improved by controlling the measurement of the ion packages ejected from the ion trap so that measurement takes place starting at the anticipated exit times of the ion packages and measurement continues only as far as possible for a time duration corresponding to the length of the ion packages. Measuring only during ion package ejection enables a measurement for the total number of ejected ions having a selected mass to be obtained by means of digital addition of the individual package measurements. Subsequent processing of the data can be carried out with practically only the fluctuations of normal ion counting statistics.
摘要翻译： 使用顺序扫描的四极离子阱质谱仪产生质谱的测量过程通过控制从离子阱排出的离子组件的测量来改进，以便在离子包装的预计出口时间开始测量和测量 仅在对应于离子包装的长度的持续时间内继续进行。 仅在离子包装喷射期间进行测量，可以通过数字添加单个包装测量值来测量具有所选质量的所排出的离子的总数。 数据的后续处理只能在实际上仅进行正常离子计数统计的波动。
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公开(公告)号：US4882484A
公开(公告)日：1989-11-21
申请号：US265108
申请日：1988-10-31
IPC分类号： H01J49/42
CPC分类号： H01J49/424 , H01J49/429
摘要： In a quadrupole ion store (QUISTOR), a sample is analyzed by increasing themplitude of the harmonic, or "secular", oscillations of selected stably trapped ions so that they leave the trapping field. In a preferred embodiment, deviations from the ideal electrode geometry are incorporated into the QUISTOR to produce resonance phenomena between the r and z secular oscillations, thereby increasing the amplitude of oscillations in the z direction.
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公开(公告)号：US20050269517A1
公开(公告)日：2005-12-08
申请号：US11086994
申请日：2005-03-22
申请人： Gerhard Weiss , Gerhard Heinen
发明人： Gerhard Weiss , Gerhard Heinen
CPC分类号： H01J49/022 , H01J49/062
摘要： The invention relates to ion-optical RF-operated electrode systems such as ion guide systems, ion fragmentation systems, ion filtering systems or ion storage systems which require additional DC potential gradients by means of DC voltages on resistance systems. The invention consists in supplying the DC voltages via center taps between several separate secondary windings of an RF transformer generating the RF voltage.
摘要翻译： 本发明涉及离子导向系统，离子破碎系统，离子过滤系统或离子存储系统等离子光学射频操作电极系统，其通过电阻系统上的直流电压需要额外的直流电位梯度。 本发明包括通过产生RF电压的RF变压器的几个独立的次级绕组之间的中心抽头提供DC电压。
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5.发明授权
公开(公告)号：US5028777A
公开(公告)日：1991-07-02
申请号：US285741
申请日：1988-12-16
CPC分类号： H01J49/424 , H01J49/429
摘要： For mass-spectroscopic examinations of gas mixtures a mass spectrometer is used which comprises a quistor in which ions of the gas mixture whose charge-to-mass ratio is located in a predetermined range are stored by generating an electromagnetic field. By varying the field parameters, the ions are forced successively to leave the ion trap. The intensity of the ion flow leaving the ion trap is measured as a function of the variation of the field parameters. For improving the resolution, one uses a quistor of the type where the distance-related ratio Q of the radii of the inscribed vertex circles of the electrodes comply with the condition Q.ltoreq.3.990, wherein ##EQU1## R.sub.e being the radius of the cross-section of the vertex of the end electrodes (3,5);R.sub.r being the radius of the cross-section of the vertex of the annular electrode (4);z.sub.o being the distance between the vertex of each end electrode (3,5) and the center of the quistor; andr.sub.o being the distance between the vertex of the annular electrode (4) and the center of the quistor.
摘要翻译： 对于气体混合物的质谱检测，使用质谱仪，其包括电容器，其中电荷质量比位于预定范围内的气体混合物的离子通过产生电磁场而被存储。 通过改变场参数，依次迫使离子离开离子阱。 离子离子阱的离子强度作为场参数变化的函数进行测量。 为了提高分辨率，可以使用类型的电阻，其中电极的内接顶点圆的半径的距离相关比Q符合条件Q <= 3.990，其中，
Re是 末端电极顶点的横截面（3,5）; Rr是环形电极（4）的顶点的横截面的半径; zo是每个端电极（3,5）的顶点和电阻的中心之间的距离; 并且ro是环形电极（4）的顶点与电阻器的中心之间的距离。 -
公开(公告)号：US4975577A
公开(公告)日：1990-12-04
申请号：US459156
申请日：1989-12-29
CPC分类号： H01J49/424 , H01J49/429
摘要： A method for the measurement of mass spectra by three dimensional quadrup fields (QUISTORs) is presented, in which the ions are mass-to-charge selectively ejected by a selected nonlinear resonance effect in an inharmonic QUISTOR. In order to enhance scan speed and mass resolution, the ejection of a single kind of ions can be confined to a very small time interval, either by the generation of ions within a small volume outside the field center, or by an excitation of the secular amplitudes by an additional RF voltage across the end electrodes, shortly before the ions encounter the sum resonance condition. An instrument for this method is described.
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