公开(公告)号：US20230028580A1

公开(公告)日：2023-01-26

申请号：US17868916

申请日：2022-07-20

Applicant: ISOTOPX LTD.

Inventor： Damian Paul TOOTELL ,  Anthony Michael JONES

IPC: H01J27/20 ,  H01J1/22 ,  H01J1/28

Abstract: An electron source in a gas-source mass spectrometer the electron source comprising: an electron emitter cathode presenting a thermionic electron emitter surface in communication with a gas-source chamber of the gas-source mass spectrometer for providing electrons there to; a heater element electrically isolated from the electron emitter cathode and arranged to be heated by an electrical current therein and to radiate heat to the electron emitter cathode sufficient to liberate electrons thermionically from said electron emitter surface, therewith to provide a source of electrons for use in ionising a gas the gas-source chamber.

公开(公告)号：US20240014022A1

公开(公告)日：2024-01-11

申请号：US18255837

申请日：2021-12-03

Applicant: ISOTOPX LTD

Inventor： Damian Paul TOOTELL ,  Anthony Michael JONES

IPC: H01J49/02 ,  H01J49/04 ,  H01J49/28

CPC classification number: H01J49/022 ,  H01J49/0422 ,  H01J49/28 ,  H01J49/08

Abstract: An ion source (30) for a static gas mass spectrometer is described. The ion source (30) comprises: a source block (310) defining a volume V to receive a sample gas G; an electron source (320) in fluid communication with the source block (310) and configured to provide a flux of electrons E therein for ionising the sample gas G; a set of electrodes (330), including a first electrode (330A), disposed between the electron source (320) and the source block (310); and a controller (not shown) configured to control a voltage applied to the first electrode (330A) to attenuate the flux of the electrons E into the source block (310) during a first time period following receiving of the sample gas G in the source block (310) and to permit the flux of the electrons E into the source block (310) during a second time period following the first time period.

公开(公告)号：US20200294751A1

公开(公告)日：2020-09-17

申请号：US16759400

申请日：2018-10-26

Applicant: ISOTOPX LTD.

Inventor： Damian Paul TOOTELL ,  Anthony Michael JONES

IPC: H01J27/20 ,  H01J1/22 ,  H01J1/28

Abstract: An electron source in a gas-source mass spectrometer the electron source comprising: an electron emitter cathode presenting a thermionic electron emitter surface in communication with a gas-source chamber of the gas-source mass spectrometer for providing electrons there to; a heater element electrically isolated from the electron emitter cathode and arranged to be heated by an electrical current therein and to radiate heat to the electron emitter cathode sufficient to liberate electrons thermionically from said electron emitter surface, therewith to provide a source of electrons for use in ionising a gas the gas-source chamber.