公开(公告)号：US20200161109A1

公开(公告)日：2020-05-21

申请号：US16664389

申请日：2019-10-25

Applicant: SRI International

Inventor： Ashish Chaudhary ,  Robert Timothy Short

IPC: H01J41/02 ,  G01N27/64 ,  G01L21/30

Abstract: The disclosure includes an ionization chamber, a first electron multiplier, and a second electron multiplier. The ionization chamber is configured to receive gas molecules from an environment at a pressure. The first electron multiplier is configured to receive a plurality of photons from a photon source, generate a first plurality of electrons from the plurality of photons, and discharge the first plurality of electrons into the ionization chamber to generate a plurality of gas ions from at least a portion of the gas molecules. The second electron multiplier is configured to receive the plurality of gas ions from the ionization chamber and generate a second plurality of electrons from the plurality of gas ions that is proportional to a quantity of the plurality of gas ions. A quantity of electrons of the second plurality of electrons is indicative of the pressure.

公开(公告)号：US11101120B2

公开(公告)日：2021-08-24

申请号：US16664389

申请日：2019-10-25

Applicant: SRI International

Inventor： Ashish Chaudhary ,  Robert Timothy Short

IPC: G01L21/30 ,  H01J41/02 ,  G01N27/64 ,  G01L21/34 ,  G01L21/32 ,  G01L21/12 ,  G01L9/00 ,  G01L19/00 ,  H01J41/06 ,  H01J41/04

Abstract: The disclosure includes an ionization chamber, a first electron multiplier, and a second electron multiplier. The ionization chamber is configured to receive gas molecules from an environment at a pressure. The first electron multiplier is configured to receive a plurality of photons from a photon source, generate a first plurality of electrons from the plurality of photons, and discharge the first plurality of electrons into the ionization chamber to generate a plurality of gas ions from at least a portion of the gas molecules. The second electron multiplier is configured to receive the plurality of gas ions from the ionization chamber and generate a second plurality of electrons from the plurality of gas ions that is proportional to a quantity of the plurality of gas ions. A quantity of electrons of the second plurality of electrons is indicative of the pressure.

公开(公告)号：US20200343081A1

公开(公告)日：2020-10-29

申请号：US16629528

申请日：2018-07-11

Applicant: SRI International

Inventor： Sterling Eduardo McBride ,  Joey J. Michalchuk ,  Christopher E. Holland ,  Ashish Chaudhary ,  Winston K. Chan

IPC: H01J41/20 ,  F04B37/14

Abstract: The disclosure includes an outer electrode and an inner electrode. The outer electrode defines an inner volume and is configured to receive injected electrons through at least one aperture. The inner electrode positioned in the inner volume. The outer electrode and inner electrode are configured to confine the received electrons in orbits around the inner electrode in response to an electric potential between the outer electrode and the inner electrode. The apparatus does not include a component configured to generate an electron-confining magnetic field.

公开(公告)号：US09589776B2

公开(公告)日：2017-03-07

申请号：US15070433

申请日：2016-03-15

Applicant: SRI INTERNATIONAL

Inventor： Ashish Chaudhary ,  Friso Van Amerom ,  R. Timothy Short

IPC: H01J49/00 ,  H01J49/24

CPC classification number: H01J49/0027 ,  H01J49/0013 ,  H01J49/004 ,  H01J49/0054 ,  H01J49/0059 ,  H01J49/107 ,  H01J49/24

Abstract: A dual-ionization mass spectrometer includes a first mass spectrometer module forming a hard ionization mass spectrometer, a second mass spectrometer forming a soft ionization mass spectrometer, a vacuum ultraviolet light source positioned between the first and second modules, a housing encompassing the first and second sets of plates and the light source, and an inlet positioned to receive a sample of an analyte and provide it to at least one of the sets of plates. A method of detecting a substance includes receiving a sample of an analyte into a housing through an inlet, performing soft ionization mass spectrometry on the sample with a soft ionization mass spectrometer in the housing, performing hard ionization spectrometry on the sample with a hard ionization spectrometer in the housing if needed, and generating a detection result from at least one of the soft ionization spectrometry and the hard ionization spectrometry.

Abstract translation: 双电离质谱仪包括形成硬电离质谱仪的第一质谱模块，形成软电离质谱仪的第二质谱仪，位于第一和第二模块之间的真空紫外光源，包含第一和第二 一组板和光源，以及定位成接收分析物样品并将其提供给至少一组板的入口。 检测物质的方法包括通过入口将分析物的样品接收到壳体中，通过壳体中的软质电离质谱仪对样品进行软质电离质谱分析，用硬质电离光谱仪对样品进行硬质离子化分光光度法 如果需要，在壳体中，并且从至少一种软电离光谱法和硬质电离光谱法产生检测结果。

公开(公告)号：US09117645B2

公开(公告)日：2015-08-25

申请号：US13673622

申请日：2012-11-09

Applicant: SRI International

Inventor： Friso H. W. van Amerom ,  Ashish Chaudhary ,  R. Timothy Short

IPC: H01T23/00 ,  H01J49/06

CPC classification number: H01J49/066 ,  H01T23/00

Abstract: A planar ion funnel is disclosed that can be used for ion control. In one application, the planar ion funnel can be used for ion control in a mass spectrometer. The planar ion funnel can be formed on a surface of a substantially planar substrate including an orifice. An electrically conductive structure can be formed on a top surface of the substrate that surrounds the orifice. In operation, a power can be applied to the conductive structure that causes an electric field to be generated that draws ions into and through the orifice. In one embodiment, the orifice can be circular and the conductive structure can be a series of nested rings of increasing diameter surrounding the orifice.

Abstract translation: 公开了可用于离子控制的平面离子漏斗。 在一个应用中，平面离子漏斗可用于质谱仪中的离子控制。 平面离子漏斗可以形成在包括孔口的基本上平面的基板的表面上。 导电结构可以形成在围绕孔口的基板的顶表面上。 在操作中，可以向导电结构施加功率，导致产生电场，其将离子吸入并通过孔。 在一个实施例中，孔可以是圆形的，并且导电结构可以是围绕孔的直径增加的一系列嵌套环。

公开(公告)号：US11569077B2

公开(公告)日：2023-01-31

申请号：US16629528

申请日：2018-07-11

Applicant: SRI International

Inventor： Sterling Eduardo McBride ,  Joey J. Michalchuk ,  Christopher E. Holland ,  Ashish Chaudhary ,  Winston K. Chan

IPC: H01J41/20 ,  F04B37/14 ,  H01J41/12 ,  H01J9/02 ,  H01J1/304 ,  H01J41/00 ,  H01J1/30 ,  H01J41/14 ,  H01J41/16 ,  H01J41/04 ,  H02K44/00 ,  B03C3/40 ,  G01L21/34 ,  F04B37/02 ,  B03C3/41

Abstract: The disclosure includes an outer electrode and an inner electrode. The outer electrode defines an inner volume and is configured to receive injected electrons through at least one aperture. The inner electrode positioned in the inner volume. The outer electrode and inner electrode are configured to confine the received electrons in orbits around the inner electrode in response to an electric potential between the outer electrode and the inner electrode. The apparatus does not include a component configured to generate an electron-confining magnetic field.