Systems and methods for improved contraband detection

A detector and spectrometry technology, applied in the system field of differential mobility spectrometry, which can solve problems such as interference measurement, influence on ionization chemistry, etc.

Pending Publication Date: 2020-07-28
RAPISCAN SYST INC (US)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Modifiers are added throughout the gas, including the ion source, affecting ionization chemistry and sometimes interfering with measurements

Method used

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  • Systems and methods for improved contraband detection
  • Systems and methods for improved contraband detection
  • Systems and methods for improved contraband detection

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Embodiment Construction

[0048] This specification is directed to several implementations. The following disclosure is provided to enable those of ordinary skill in the art to practice the invention. Language used in this specification should not be construed as a general disavowal of any one specific embodiment or used to limit the claims beyond the meaning of the terms used therein. The general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present invention. Additionally, the terms and phrases used are for the purpose of describing the exemplary embodiments and should not be regarded as limiting. Accordingly, this description is to be accorded the widest scope encompassing numerous alternatives, modifications and equivalents consistent with the principles and features disclosed. For the purpose of clarity, details related to technical material that is known in the technical fields related to the invention have not ...

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Abstract

A system for multi-stage differential mobility spectrometer (multi-stage DMS) and the method of operating and using the same are described. Ions produced in an ionization source are introduced into the separation region of multi-stage DMS, which includes at least two DMS stages. Each DMS stage is configured to generate separation and compensation fields to characterize, separate, or select ion species. The separation region further includes ion alteration stages which are placed between various adjacent stages of multi-stage DMS. Alteration of ions can be both chemical and physical. Ions whichare separated, altered, and selectively passed by all DMS stages of multi-stage DMS are then measured or further characterized by the Faraday plate detectors or a mass spectrometer.

Description

[0001] cross reference [0002] For priority, this specification relies on U.S. Patent Provisional Application No. 62 / 611,313, filed December 28, 2017, entitled "Dual Stage Differential Mobility Spectrometer," the entire contents of which are incorporated herein by reference. technical field [0003] This specification relates to systems for differential mobility spectroscopy (DMS). More specifically, this description relates to multi-stage DMS analyzers and methods of operation and use. Background technique [0004] Ion mobility methods such as differential mobility spectrometry (DMS) are used in chemical measurements and are based on the formation of ions originating from a sample and the characterization of these ions in an electric field and a supporting gas atmosphere. The support atmosphere may include air, nitrogen, and combinations of gases including hydrogen and helium at pressures ranging from a few Torr to ambient pressure. The characterization of gas ions in an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N27/62H01J49/26
CPCG01N27/624H01J49/0409H01J49/0031
Inventor 加里·A·埃斯曼马伦·R·门利亚迪夫哈特维希·施密特斯特凡·R·卢科维彼得·福勒李京一
Owner RAPISCAN SYST INC (US)
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