公开(公告)号：US20170328863A1

公开(公告)日：2017-11-16

申请号：US15527192

申请日：2014-11-17

Applicant: SHIMADZU CORPORATION

Inventor： Motohide YASUNO ,  Ryo FUJITA

IPC: G01N27/62 ,  G01N30/72 ,  H01J49/14 ,  H01J49/04

Abstract: A spray area in which a large number of droplets of a liquid sample sprayed from a spray nozzle is separated from the tip of a needle electrode for corona discharge by a sufficiently large distance, with a grid electrode facing the needle electrode placed in between. Ring electrodes for creating an electric field which drives primary ions that should react with the sample and generate sample-derived ions are provided within an ion chamber between the grid electrode and the spray area. Primary ions generated by corona discharge within the space between the needle electrode and the grid electrode pass through the opening of the grid electrode, reach the spray area under the effect of the electric field, and ionize sample components. Since the droplets are prevented from adhering to the needle electrode, the corona discharge is maintained in a stable state.

公开(公告)号：US20180328886A1

公开(公告)日：2018-11-15

申请号：US15758609

申请日：2015-09-09

Applicant: SHIMADZU CORPORATION

Inventor： Motohide YASUNO ,  Akiko IMAZU

IPC: G01N27/68 ,  H01J49/10 ,  H01J49/40 ,  G01N27/62

CPC classification number: G01N27/68 ,  G01N27/622 ,  H01J49/10 ,  H01J49/40

Abstract: A first shutter gate is disposed at an entrance of a drift region, and a second shutter gate is disposed on the downstream side in an ion-drifting direction. In a high-resolution measurement mode, a controller (9) controls voltage generators to open the second shutter gate to collect ions into a pulsed form at the first shutter gate. In this mode, the controller controls the voltage generators to open the first shutter gate to collect ions into a pulsed form at the second shutter gate. In a zoom-in measurement mode where ions within a specified range of ion mobility are measured with high resolving power, the controller controls the voltage generators to open the first shutter gate for a short period of time, and then to open the second shutter gate for a short period of time after a lapse of a predetermined time period.

公开(公告)号：US20160327516A1

公开(公告)日：2016-11-10

申请号：US15108918

申请日：2014-01-14

Applicant: SHIMADZU CORPORATION

Inventor： Masaru NISHIGUCHI ,  Motohide YASUNO ,  Ryo FUJITA

IPC: G01N27/62 ,  H01J49/42 ,  H01J49/06

CPC classification number: G01N27/622 ,  H01J49/004 ,  H01J49/04 ,  H01J49/062 ,  H01J49/4215

Abstract: A drift voltage generator applies voltages to a plurality of annular electrodes, respectively, so that a potential distribution φ on an ion beam axis of an accelerating electric field created within a drift region satisfies ∂2φ/∂Z2>0. Trailing ions undergo a higher rate of acceleration than preceding ions, so that a compressing force acts on an ion packet in the direction of the ion beam axis. Consequently, the ion packet is constantly confined to a smaller space in the direction of the ion beam axis, and ions having the same ion mobility form a narrower peak in a spectrum with the horizontal axis representing the drift time, so that the resolving power improves. A control unit switches the applied voltages so that a uniform accelerating electric field is created.

Abstract translation: 漂移电压发生器分别对多个环形电极施加电压，使得在漂移区域内产生的加速电场的离子束轴上的电势分布φ满足∂2φ/∂Z2> 0。 跟踪离子经历比先前的离子更高的加速度，使得压缩力在离子束轴线的方向作用于离子包。 因此，离子束在离子束轴的方向上恒定地限制在较小的空间，具有相同离子迁移率的离子在水平轴表示漂移时间的频谱中形成较窄的峰值，从而提高分辨能力 。 控制单元切换所施加的电压，从而产生均匀的加速电场。

公开(公告)号：US20150371839A1

公开(公告)日：2015-12-24

申请号：US14645850

申请日：2015-03-12

Applicant: SHIMADZU CORPORATION

Inventor： Motohide YASUNO

IPC: H01J49/06 ,  H01J49/42

CPC classification number: H01J49/066 ,  H01J49/04 ,  H01J49/063 ,  H01J49/065

Abstract: A first ion transport unit with an ion funnel structure having high acceptance is arranged in the front half and a second ion transport unit with a Q-array structure having low emittance and high gas conductance is arranged in the rear half, and an aperture electrode to which only direct current voltage is applied is provided between them. The inside diameter of the opening of the aperture electrode is made larger than the inside diameter of the opening of the ring electrode at the last stage of the first ion transport unit, and the inscribed circle diameter of the first stage electrode plate of the second ion transport unit is made larger still. As a result, interference of high frequency electric fields between the first ion transport unit and the second ion transport unit 14 is reduced and ions which have exited the first ion transport unit are inputted at low loss into the second ion transport unit.

Abstract translation: 具有高接受度的离子漏斗结构的第一离子传输单元布置在前半部分中，并且具有低发射率和高气体导电性的Q阵列结构的第二离子传输单元布置在后半部分中，孔径电极 在它们之间仅提供直流电压。 孔电极的开口的内径比第一离子传输单元的最后阶段的环状电极的开口的内径大，第二离子的第一级电极板的内接圆直径 运输单位变得更大。 结果，第一离子传输单元和第二离子传递单元14之间的高频电场的干扰减小，离开第一离子传输单元的离子以低损耗输入到第二离子传输单元中。