公开(公告)号：US12119214B2

公开(公告)日：2024-10-15

申请号：US17975493

申请日：2022-10-27

Applicant: AGILENT TECHNOLOGIES, INC.

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

IPC: H01J49/06

CPC classification number: H01J49/063 ,  H01J49/065

Abstract: An ion guide includes electrodes elongated along an axis from an entrance end to an exit end and spaced around the axis to surround an interior. The electrodes have polygonal shapes with inside surfaces disposed at a radius from the axis and having an electrode width tangential to a circle inscribed by the electrodes. An aspect ratio of the electrode width to the radius varies along the axis. The electrodes are configured to generate a two-dimensional RF electrical field in the interior having a multipole composition comprising one or more lower-order multipole components and one or more higher-order multipole components and varying along the axis in accordance with the varying aspect ratio, and having an RF voltage amplitude that varies along the axis.

公开(公告)号：US20220336199A1

公开(公告)日：2022-10-20

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

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.

公开(公告)号：US20210407784A1

公开(公告)日：2021-12-30

申请号：US17242040

申请日：2021-04-27

Applicant: Agilent Technologies, Inc.

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

IPC: H01J49/06

Abstract: An ion guide includes electrodes elongated along an axis from an entrance end to an exit end and spaced around the axis to surround an interior. The electrodes have polygonal shapes with inside surfaces disposed at a radius from the axis and having an electrode width tangential to a circle inscribed by the electrodes. An aspect ratio of the electrode width to the radius varies along the axis. The electrodes are configured to generate a two-dimensional RF electrical field in the interior having a multipole composition comprising one or more lower-order multipole components and one or more higher-order multipole components and varying along the axis in accordance with the varying aspect ratio, and having an RF voltage amplitude that varies along the axis.

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.

公开(公告)号：US11515137B2

公开(公告)日：2022-11-29

申请号：US17242040

申请日：2021-04-27

Applicant: Agilent Technologies, Inc.

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

IPC: H01J49/06

Abstract: An ion guide includes electrodes elongated along an axis from an entrance end to an exit end and spaced around the axis to surround an interior. The electrodes have polygonal shapes with inside surfaces disposed at a radius from the axis and having an electrode width tangential to a circle inscribed by the electrodes. An aspect ratio of the electrode width to the radius varies along the axis. The electrodes are configured to generate a two-dimensional RF electrical field in the interior having a multipole composition comprising one or more lower-order multipole components and one or more higher-order multipole components and varying along the axis in accordance with the varying aspect ratio, and having an RF voltage amplitude that varies along the axis.