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.