公开(公告)号：US20230197427A1

公开(公告)日：2023-06-22

申请号：US17918375

申请日：2020-04-17

Applicant: SHIMADZU CORPORATION

Inventor： Yuta MIYAZAKI ,  Shiro MIZUTANI ,  Wataru FUKUI

IPC: H01J49/02 ,  H01J49/16

CPC classification number: H01J49/022 ,  H01J49/167

Abstract: An ion analyzer 2 including: a power feeding circuit 26 in which a power supply connection part 261, a first electrode connection part 262, a first resistance element 263, a second electrode connection part 264, a second resistance element 265, and a grounding part are provided in series; a power supply P connected to the power supply connection part 261 and configured to output both a DC positive voltage and a DC negative voltage; a first voltage supply electrode 23 connected to the first electrode connection part 262; and a second voltage supply electrode 24 connected to the second electrode connection part 264. In particular, it can be suitably used as a device for applying a voltage to a push electrode 23 and a convergence electrode 24 disposed in an ionization chamber 20 of a mass spectrometer including an ESI source 21.

公开(公告)号：US20170323773A1

公开(公告)日：2017-11-09

申请号：US15520112

申请日：2014-10-20

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/10 ,  H01J49/06 ,  H01J49/00 ,  H01J49/42 ,  H01J3/40

CPC classification number: H01J49/10 ,  H01J3/40 ,  H01J49/0036 ,  H01J49/0095 ,  H01J49/022 ,  H01J49/063 ,  H01J49/165 ,  H01J49/4245 ,  H02M7/10 ,  H02M7/103

Abstract: A high-voltage power source for applying high voltage to a nozzle of an ESI ion source includes a charge release assistant section (26) including switch circuits (62 and 65) and other elements for forcing electric charges accumulated at output terminals to be discharged in a polarity-switching operation, whereby the positive/negative switching of the polarity of the output voltage can be quickly performed. In the mass spectrometer according to the present invention, for example, when the voltage applied to the nozzle needs to be changed from Vi to V2 (where V1 and V2 are positive, and V1>V2), a voltage control section (20) under the command of a main controller (9) operates a positive voltage generation section (21) and negative voltage generation section (23) so as to temporarily provide a negative output voltage. After a predetermined period of time, the voltage control section operates the positive voltage generation section (21) and negative voltage generation section (23) so as to provide voltage V2. If the voltage was simply changed from V1 to V2, the voltage would decrease slowly and require considerable time for the change. The positive/negative switching of the polarity induces the discharging of the electric charges accumulated at the output terminals, and consequently, the voltage-switching operation from V1 to V2 is quickly performed.

公开(公告)号：US20240112899A1

公开(公告)日：2024-04-04

申请号：US18447640

申请日：2023-08-10

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/00 ,  H01J49/02 ,  H01J49/42

CPC classification number: H01J49/0009 ,  H01J49/022 ,  H01J49/4215

Abstract: A power supply device applies a voltage to a quadrupole mass filter. The power supply device has a main substrate and a wave-detection substrate. The main substrate includes a detector. The wave-detection substrate includes a wave detector and an identifier. The wave detector detects an AC component of a voltage to be applied to the quadrupole mass filter as a wave-detection voltage. The identifier outputs identification information of the wave detector defined in correspondence with the configuration of a rectifying device of the wave detector. The detector detects identification information output by the identifier, and supplies the detected identification information to a corrector that corrects a deviation of voltage caused by a leakage current of the rectifying device.

公开(公告)号：US20210202229A1

公开(公告)日：2021-07-01

申请号：US16755729

申请日：2017-11-02

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/40 ,  H01J49/02

Abstract: An acceleration voltage generator (7) generates a high-voltage pulse to be applied to an electrode in an orthogonal accelerator by turning on/off a high DC voltage generated by a high-voltage power source through MOSFETs (741) in a switch circuit (74). A controller (6) sends driving pulse signals to the switch circuit (74) through a primary-side driver section (71), transformer (72) and secondary driver section (73). An adjustment circuit (742) formed by a gate resistor (742a) and gate capacitor (742b) is provided between the secondary-side driver section (73) and the MOSFET (741). The resistance value of the resistor (742a) and the capacitance value of the capacitor (742b) are determined so as to suppress an overshoot of the gate voltage due to the resonance while preventing a decrease in steepness of the waveform in its rising and falling phases.

公开(公告)号：US20210233762A1

公开(公告)日：2021-07-29

申请号：US17053397

申请日：2018-05-31

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/40

Abstract: An acceleration voltage generator is configured to cause a power MOSFET to turn on or off to switch a high direct-current voltage, so as to generate a high-voltage pulse for an ejection of ions from an ion ejector. A drive signal is used to cause the power MOSFET to turn on, and further includes a secondary drive signal to recharge a gate capacitance to cause the power MOSFET to stay in an on-state. In a drive signal generator, edge detection circuits generate an edge detection signal based on a start signal; selection circuits generate a primary drive signal by adjusting the edge detection signal in its signal width; and a secondary drive signal generator includes multiple circuit elements such as a semiconductor element, and generates the secondary drive signal.

公开(公告)号：US20190157058A1

公开(公告)日：2019-05-23

申请号：US16315883

申请日：2016-08-22

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/02 ,  H01J49/40

CPC classification number: H01J49/022 ,  H01J49/40 ,  H01J49/403

Abstract: An acceleration voltage generator generates a high-voltage pulse applied to a push-out electrode, by operating a switch section to turn on and off a high direct-current voltage generated by a high-voltage power supply. A drive pulse signal is supplied from a controller to the switch section through a primary-side drive section, transformer, and secondary-side drive section. A primary-voltage controller receives a measurement result of ambient temperature of the acceleration voltage generator from a temperature sensor, and controls a primary-side power supply to change a primary-side voltage according to the temperature, thereby adjusting the voltage applied between the two ends of a primary winding of the transformer. The adjustment made on the primary-side voltage changes a slope angle of rise of a gate voltage in the MOSFET, and enables a correction to a discrepancy in the timing of the rise/fall of the high-voltage pulse caused by change in ambient temperature.

公开(公告)号：US20150228469A1

公开(公告)日：2015-08-13

申请号：US14178404

申请日：2014-02-12

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/42 ,  H01J49/02

CPC classification number: H01J49/4215

Abstract: A quadrupole mass spectrometry apparatus including a quadrupole power supply unit, in which the frequency of the high frequency voltage produced by a high frequency power supply is made switchable, and variable capacitors are provided in parallel with the floating capacitance of a quadrupole mass filter. In a high sensitivity mode which prioritizes sensitivity, the frequency of the high frequency voltage is made higher than in a high mass mode which prioritizes width of mass range, and the capacitance values of variable capacitors are increased. Increasing the capacitance value forming an LC resonant circuit causes the frequency based on the LC resonance conditions to rise, making it possible to cause LC resonance of the high frequency voltage with a higher frequency and to increase the amplitude thereof.

Abstract translation: 包括四极电源单元的四极质谱仪器，其中由高频电源产生的高频电压的频率可切换，并且可变电容器与四极质量滤波器的浮置电容并联设置。 在灵敏度优先的高灵敏度模式中，高频电压的频率高于质量范围优先的高质量模式，并且可变电容器的电容值增加。 增加形成LC谐振电路的电容值使得基于LC谐振条件的频率升高，使得可能导致具有较高频率的高频电压的LC谐振并且增加其振幅。

公开(公告)号：US20210217604A1

公开(公告)日：2021-07-15

申请号：US17058179

申请日：2018-05-28

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI ,  Tomoyuki OSHIRO ,  Yuta MIYAZAKI

IPC: H01J49/40 ,  H01J49/00 ,  G01N30/72

Abstract: An analytical device includes: a first acceleration unit including a first acceleration electrode to which a pulse voltage for accelerating ions is applied; a flight tube; a second acceleration unit that is arranged between the first acceleration unit and the flight tube, and includes a second acceleration electrode to which a voltage for accelerating the ions is applied; an ion detector that detects the ions; and a capacitance adjustment unit that causes adjustment of a capacitance between at least one set of electrodes among a plurality of electrodes arranged in the first acceleration unit, the second acceleration unit, and a flight tube.

公开(公告)号：US20210210326A1

公开(公告)日：2021-07-08

申请号：US17058321

申请日：2018-05-28

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI

IPC: H01J49/40 ,  H01J49/10 ,  H01J49/02

Abstract: An analytical device includes: a first electrode to which a pulse voltage for accelerating ions is applied; at least one switching element that controls application of the pulse voltage to the first electrode; a second electrode that defines a space in which the ions fly; an ion detector that detects the ions; and a vacuum vessel that has the second electrode inside, wherein: the switching element is in contact with an insulator, and the insulator is in contact with the vacuum vessel.

公开(公告)号：US20170125233A1

公开(公告)日：2017-05-04

申请号：US15300478

申请日：2014-03-31

Applicant: SHIMADZU CORPORATION

Inventor： Shiro MIZUTANI ,  Shigenobu NAKANO

IPC: H01J49/42 ,  H01J49/00

CPC classification number: H01J49/421 ,  H01J49/0027 ,  H01J49/0031 ,  H01J49/40

Abstract: The present invention is a mass spectrometer (1) for sequentially performing a measurement for a plurality of target ions, characterized by a storage section (41) for holding ion time-of-flight information concerning the time required for each of target ions to fly through each of the sections constituting the mass spectrometer, and a voltage controller (42) for changing, based on the ion time-of-flight information, the voltage applied to each of those sections to a voltage suited for each target ion, with a time lag corresponding to the difference in the timing of the arrival of the target ion at the section concerned.