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    Surface ion trap having a trapping location whose position is controllable in three dimensions with high precision
    31.
    发明授权
    Surface ion trap having a trapping location whose position is controllable in three dimensions with high precision 有权

    公开(公告)号：US10510523B2

    公开(公告)日：2019-12-17

    申请号：US16037988

    申请日：2018-07-17

    申请人： Duke University

    发明人： Jungsang Kim ,  Andre Van Rynbach ,  Peter Maunz

    IPC分类号： H01J49/42 ,  H01J49/14 ,  G06N10/00

    摘要： An ion-trap system having a trapping location that is controllable with nanometer-scale precision in three dimensions is disclosed. The ion-trap system includes an ion trap that includes a pair of RF driver electrodes, a pair of tuning electrodes operably coupled with the RF driver electrodes to collectively generate an RF field having an RF null that defines the trapping location, as well as a plurality of DC electrodes that are operably coupled with the RF driver electrodes and the tuning electrodes. Each tuning electrode is driven with an RF signal whose amplitude and phase is independently controllable. By controlling the amplitudes of the RF signals applied to the tuning electrodes, the height of the trapping location above the mirror is controlled. The position of the tuning location along two orthogonal lateral directions is controlled by controlling a plurality of DC voltages applied to the plurality of DC electrode pads.

    Soft ionization based on conditioned glow discharge for quantitative analysis
    36.
    发明授权
    Soft ionization based on conditioned glow discharge for quantitative analysis 有权

    公开(公告)号：US10373814B2

    公开(公告)日：2019-08-06

    申请号：US16259769

    申请日：2019-01-28

    申请人： LECO Corporation

    发明人： Anatoly N. Verenchikov ,  Alexander Kolosov

    IPC分类号： H01J49/04 ,  H01J49/10 ,  H01J49/14 ,  H01J49/00 ,  G01N30/84

    摘要： One aspect of the disclosure provides a method of mass spectrometric analysis that includes producing either glow discharge within a noble gas between 3-100 mBar pressure, sampling and conditioning glow discharge products within a gas flow through a conductive channel, removing charged particles while transferring excited Ridberg atoms, and mixing conditioned discharge products with analyte flow within an enclosed chamber at elevated temperatures above 150° Celsius for producing a Penning reaction between analyte molecules and Ridberg atoms. The method further includes sampling, by a gas flow, said analyte ions for mass spectrometric analysis, and at least one of the following steps: (i) removing charge within said conditioning channel; (ii) coaxially mixing of analyte flow with the flow of conditioned plasma; and (iii) cooling of the mixed flow within a sonic or supersonic jet for reducing the region of Penning ionization to cold jet.

    METHODS, APPARATUS, AND SYSTEM FOR MASS SPECTROMETRY
    37.
    发明申请
    METHODS, APPARATUS, AND SYSTEM FOR MASS SPECTROMETRY 审中-公开

    公开(公告)号：US20190214243A1

    公开(公告)日：2019-07-11

    申请号：US16351700

    申请日：2019-03-13

    申请人： Massachusetts Institute of Technology

    发明人： Ian W. HUNTER ,  Brian D. HEMOND ,  Harold F. HEMOND

    IPC分类号： H01J49/30 ,  H01J49/02 ,  H01J49/24 ,  H01J49/00 ,  H01J49/14

    CPC分类号： H01J49/30 ,  H01J49/0013 ,  H01J49/0031 ,  H01J49/022 ,  H01J49/147 ,  H01J49/24

    摘要： A miniature, low cost mass spectrometer capable of unit resolution over a mass range of 10 to 50 AMU. The mass spectrometer incorporates several features that enhance the performance of the design over comparable instruments. An efficient ion source enables relatively low power consumption without sacrificing measurement resolution. Variable geometry mechanical filters allow for variable resolution. An onboard ion pump removes the need for an external pumping source. A magnet and magnetic yoke produce magnetic field regions with different flux densities to run the ion pump and a magnetic sector mass analyzer. An onboard digital controller and power conversion circuit inside the vacuum chamber allows a large degree of flexibility over the operation of the mass spectrometer while eliminating the need for high-voltage electrical feedthroughs. The miniature mass spectrometer senses fractions of a percentage of inlet gas and returns mass spectra data to a computer.

    Methods, apparatus, and system for mass spectrometry
    40.
    发明授权
    Methods, apparatus, and system for mass spectrometry 有权

    公开(公告)号：US10236172B2

    公开(公告)日：2019-03-19

    申请号：US15645147

    申请日：2017-07-10

    申请人： Massachusetts Institute of Technology

    发明人： Ian W. Hunter ,  Brian D. Hemond ,  Harold F. Hemond

    IPC分类号： H01J49/30 ,  H01J49/00 ,  H01J49/14 ,  H01J49/02 ,  H01J49/24

    摘要： A miniature, low cost mass spectrometer capable of unit resolution over a mass range of 10 to 50 AMU. The mass spectrometer incorporates several features that enhance the performance of the design over comparable instruments. An efficient ion source enables relatively low power consumption without sacrificing measurement resolution. Variable geometry mechanical filters allow for variable resolution. An onboard ion pump removes the need for an external pumping source. A magnet and magnetic yoke produce magnetic field regions with different flux densities to run the ion pump and a magnetic sector mass analyzer. An onboard digital controller and power conversion circuit inside the vacuum chamber allows a large degree of flexibility over the operation of the mass spectrometer while eliminating the need for high-voltage electrical feedthroughs. The miniature mass spectrometer senses fractions of a percentage of inlet gas and returns mass spectra data to a computer.