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    Increased dynamic range for the attenuation of an ion beam
    2.
    发明授权
    Increased dynamic range for the attenuation of an ion beam 有权

    公开(公告)号：US12027357B2

    公开(公告)日：2024-07-02

    申请号：US17622568

    申请日：2020-07-22

    Applicant: DH Technologies Development PTE. LTD.

    Inventor： Bruce Collings ,  Pascal Martin

    IPC: H01J49/00 ,  H01J49/02 ,  H01J49/06

    CPC classification number: H01J49/0031 ,  H01J49/0036 ,  H01J49/022 ,  H01J49/067

    Abstract: In one aspect, a method of modulating transmission of ions in a mass spectrometer is disclosed, which comprises generating an ion beam comprising a plurality of ions, directing the ion beam to an ion optic positioned in the path of the ion beam, wherein the ion optic includes at least one opening through which the ions can pass, and applying one or more voltage pulses at a selected duty cycle to said ion optic so as to obtain a desired attenuation of brightness of the ion beam passing through the ion optic, where a pulse width of said voltage pulses at said selected duty cycle is determined by identifying a pulse width on a calibration normalized ion intensity versus pulse width relation for said ions that corresponds to said desired attenuation on an ideal normalized ion intensity versus pulse width relation for said ions.

    Process for producing hydrogen and carbon products
    7.
    发明授权
    Process for producing hydrogen and carbon products 有权

    公开(公告)号：US11873219B2

    公开(公告)日：2024-01-16

    申请号：US17045961

    申请日：2019-04-04

    Applicant: SHELL OIL COMPANY

    Inventor： Leonardo Spanu ,  Carolus Matthias Anna Maria Mesters

    IPC: C01B3/30 ,  C01B32/162 ,  B01J23/755 ,  C01B3/56 ,  H01J49/06 ,  H01J49/10 ,  H01J49/24

    CPC classification number: C01B3/30 ,  B01J23/755 ,  C01B3/56 ,  C01B32/162 ,  H01J49/067 ,  H01J49/105 ,  H01J49/24 ,  C01B2203/0277

    Abstract: A method of operating a mass spectrometer vacuum interface, the vacuum interface comprising an evacuated expansion chamber downstream of a plasma ion source at atmospheric or relatively high pressure, the expansion chamber having a first aperture that interfaces with the plasma ion source to form an expanding plasma downstream of the first aperture and a second aperture downstream of the first aperture from the plasma for skimming the expanding plasma to form a skimmed expanding plasma; wherein the expansion chamber is pumped by an interface vacuum pump to provide an interface pressure in the chamber; the method comprising using a controller to automatically, or according to user input, control the throughput of the interface vacuum pump to control the interface pressure dependent on one or more operating modes of the spectrometer. A pressure gauge can be located in the expansion chamber and a feedback loop provided between the pressure gauge and controller.

    Axially progressive lens for transporting charged particles
    8.
    发明授权
    Axially progressive lens for transporting charged particles 有权

    公开(公告)号：US11791149B2

    公开(公告)日：2023-10-17

    申请号：US17631393

    申请日：2020-07-16

    Applicant: Agilent Technologies, Inc.

    Inventor： Tong Chen ,  Curt A. Flory ,  Gershon Perelman

    IPC: H01J49/06 ,  H01J37/12

    CPC classification number: H01J49/067 ,  H01J37/12 ,  H01J2237/1215 ,  H01J2237/1534

    Abstract: An electrostatic lens for transporting charged particles in an axial direction includes a first group of first electrodes configured to receive a first DC potential from a DC voltage source, and a second group of second electrodes configured to receive a second DC potential from the DC voltage source different from the first DC potential. The first electrodes are interdigitated with the second electrodes. The first group and/or the second group has a geometric feature that progressively varies along the axial direction. The lens generates an axial potential profile that progressively changes along the axial direction, and thereby reduces geometrical aberrations. The lens may be part of a charged particle processing apparatus such as, for example, a mass spectrometer or an electron microscope.

    DALY DETECTOR OPERABLE IN NEGATIVE ION AND POSITIVE ION DETECTION MODES
    9.
    发明公开
    DALY DETECTOR OPERABLE IN NEGATIVE ION AND POSITIVE ION DETECTION MODES 审中-公开

    公开(公告)号：US20230243986A1

    公开(公告)日：2023-08-03

    申请号：US18190483

    申请日：2023-03-27

    Applicant: Thermo Finnigan LLC

    Inventor： Linfan LI ,  Jae C. SCHWARTZ ,  Oleg SILIVRA

    IPC: G01T1/28 ,  H01J49/00 ,  H01J49/06 ,  H01J49/02

    CPC classification number: G01T1/28 ,  H01J49/0095 ,  H01J49/067 ,  H01J49/025

    Abstract: A method of ion detection comprises: (a) setting electrical potentials of a dynode and a scintillator electrode of a Daly detector and of a focusing lens disposed at an ion inlet of the Daly detector so as to detect negatively charged ions received from a mass analyzer or mass filter; (b) transferring the negatively charged ions from the mass analyzer or mass filter to the Daly detector through the lens and detecting said negatively charged ions by a photodetector of the Daly detector; (c) setting electrical potentials of the dynode, the scintillator electrode and the focusing lens of the Daly detector so as to detect positively charged ions received from the mass analyzer or mass filter; and (d) transferring the positively charged ions from the mass analyzer or mass filter to the Daly detector through the lens and detecting said positively charged ions by the photodetector.

    Apparatuses for optical and mass spectrometry detection
    10.
    发明授权
    Apparatuses for optical and mass spectrometry detection 有权

    公开(公告)号：US11676807B2

    公开(公告)日：2023-06-13

    申请号：US17545804

    申请日：2021-12-08

    Applicant: GMJ Technologies, Inc.

    Inventor： Oluwatosin O. Dada

    IPC: H01J49/16 ,  G01N27/447 ,  H01J49/02 ,  H01J49/06

    CPC classification number: H01J49/167 ,  G01N27/44721 ,  H01J49/022 ,  H01J49/025 ,  H01J49/067

    Abstract: Presented herein are apparatuses for use in capillary separations. An apparatus includes a coupling that integrates a capillary with a voltage source, a sheath liquid system, a fluid exit port, and a manifold. The coupling may be an elbow connector or equivalent. The manifold receives incident light from an incident light input, and emitted light is collected by a collected light output. The capillary enters the manifold at an input for the capillary, traverses the coupling, and terminates at the fluid exit port, for example an electrospray emitter. The capillary may also enter the manifold at an input for the capillary and terminates inside the manifold.

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