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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
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。
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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
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.
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公开(公告)号：US20190244801A1
公开(公告)日：2019-08-08
申请号：US15891445
申请日：2018-02-08
Applicant: SHIMADZU CORPORATION
Inventor： Ryo FUJITA
CPC classification number: H01J49/403 , H01J49/0086
Abstract: A shielding plate 6 having a forward-side slit opening 61 and return-side slit opening 62 is placed in a free flight space 3 with no electric field. Ions which significantly deviate from a reference path are removed by the shielding plate 6 on both the forward-side and return-side paths. The opening width of the forward-side slit opening 61 is smaller than that of the return-side slit opening 62. Those opening widths and the placement position of the shielding plate 6 are determined based on the result of an ion trajectory calculation by accurate simulation. As compared to a conventional device with a shielding plate placed only on the return side, the present configuration allows for an increase in the opening width of the return-side slit opening while achieving the same level of resolving power. The ion transmission ratio is thereby improved, and the analytical sensitivity is enhanced.
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Patent Agency Ranking
公开(公告)号：US20250037984A1
公开(公告)日：2025-01-30
申请号：US18709488
申请日：2022-08-26
Applicant: SHIMADZU CORPORATION
Inventor： Ryo FUJITA , Tomoyoshi MATSUSHITA
Abstract: When a gas is supplied from a gas supply unit (19) to a collision cell (11) in detection of a first target ion, before detection of the first target ion, a controller (22) applies a voltage having a first adjustment voltage value to an electrode located on a downstream side of the collision cell (11) in an ion traveling direction, the first adjustment voltage value being obtained by adding an adjustment value to a first detection voltage value corresponding to the first target ion, and in detection of the first target ion, the controller (22) applies a voltage having the first detection voltage value to the electrode located on the downstream side of the collision cell (11) in the ion traveling direction. The adjustment value is a value indicating a polarity opposite to a polarity of the first target ion.
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公开(公告)号：US20190025254A1
公开(公告)日：2019-01-24
申请号：US15755672
申请日：2016-05-23
Applicant: SHIMADZU CORPORATION
Inventor： Ryo FUJITA
Abstract: An inner space having a rectangular cross section with the long-side-to-short-side ratio greater than one is formed in a housing (20A, 20B) made of an insulator. The inner space forms a desolvation region (4) and a drift region (5). A shutter gate (22) located within the inner space also has a long-side-to-short-side ratio greater than one. A number of conductive wires are stretched over the opening of the gate to form grid electrodes. This configuration allows the shutter gate (22) to have a large opening area while using short conductive wires to decrease the amount of deflection of the wires due to the potential difference between the wires and thereby prevent the adjacent wires from coming in contact with each other as well as prevent the electric field from being disordered due to an operation for allowing ions to pass through or blocking ions. Since the desolvation region (4) and drift region (5) have a rectangular cross section, the Reynolds number is low, and a diffusion gas forms a laminar flow. Thus, the analysis accuracy and resolving power will also be improved.
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公开(公告)号：US20150108345A1
公开(公告)日：2015-04-23
申请号：US14506967
申请日：2014-10-06
Applicant: SHIMADZU CORPORATION
Inventor： Ryo FUJITA
CPC classification number: H01J49/062 , G01N27/622 , H01J49/04 , H01J49/061
Abstract: Shutter gate grid is a structure wherein first and second disc-shaped members made of metal with an insulation sheet member sandwiched therebetween are integrally joined by means of insulative screws. Gate grids with conductive wires secured to the central openings thereof are fused onto the disc-shaped members; screw insertion holes formed in the second disc-shaped member are fan-shaped and have play in the direction of rotation, making it possible to adjust the parallelism of the conductive wires of the two members by finely adjusting the rotational position when tightening the screws. Moreover, diffusion gas can be made to flow through ventilation holes provided at common locations on each member, thus making it possible to provide uniformity of diffusion gas flow in the drift region.
Abstract translation: 快门栅格是这样的结构，其中由绝缘片构件夹在其间的由金属制成的第一和第二盘状构件通过绝缘螺钉一体地接合。 具有固定到其中心开口的导电线的栅极栅格被熔合到盘形构件上; 形成在第二盘状构件中的螺钉插入孔是扇形的并且在旋转方向上起作用，使得可以通过在拧紧螺钉时精细地调节旋转位置来调节两个构件的导线的平行度。 此外，扩散气体可以通过设置在每个构件上的公共位置处的通气孔流动，从而使得可以在漂移区域中提供扩散气流的均匀性。
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公开(公告)号：US20250014884A1
公开(公告)日：2025-01-09
申请号：US18710286
申请日：2022-06-02
Applicant: SHIMADZU CORPORATION
Inventor： Tomoyoshi MATSUSHITA , Ryo FUJITA , Junichi TANIGUCHI
Abstract: ICP-MS includes: an ion source to ionize a sample component; a vacuum chamber (4-into which generated ions are introduced; a cell inside the vacuum chamber to bring the ions into contact with a predetermined gas; a mass spectrometer unit at a later stage of the vacuum chamber to perform mass spectrometry of ions having passed through the cell or ions derived from the ions; a first gas introduction unit to introduce a predetermined gas into the cell; a second gas introduction unit to introduce a predetermined gas into the vacuum chamber and outside the cell; and controllers to control gas introduction such that a gas is introduced by the first gas introduction unit when analysis is performed while bringing a gas into contact with ions, whereas a gas is introduced by the second gas introduction unit when analysis is performed without bringing a gas into contact with ions.
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公开(公告)号：US20240402096A1
公开(公告)日：2024-12-05
申请号：US18586072
申请日：2024-02-23
Applicant: SHIMADZU CORPORATION
Inventor： Ryo FUJITA , Hiroki MAEDA , Naoki MORIMOTO
Abstract: This X-ray imaging apparatus is equipped with an X-ray tube, a detector for detecting X-rays emitted from the X-ray tube and transmitted through the subject, and an image processing unit for generating an image based on a detection signal output from the detector. The X-ray imaging apparatus is provided with a controller configured to cause X-rays to be emitted such that the distance between the plurality of focal positions of the plurality of electron beams on the inclined surface differs as viewed from the subject's side, depending on the size of the subject, by causing a part of the plurality of electron emitters to emit electron beams.
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