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Title: Ion mobility spectrometer with virtual aperture grid

Abstract

An ion mobility spectrometer does not require a physical aperture grid to prevent premature ion detector response. The last electrodes adjacent to the ion collector (typically the last four or five) have an electrode pitch that is less than the width of the ion swarm and each of the adjacent electrodes is connected to a source of free charge, thereby providing a virtual aperture grid at the end of the drift region that shields the ion collector from the mirror current of the approaching ion swarm. The virtual aperture grid is less complex in assembly and function and is less sensitive to vibrations than the physical aperture grid.

Inventors:
 [1];  [2]
  1. Los Lunas, NM
  2. Albuquerque, NM
Issue Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1014744
Patent Number(s):
7838823
Application Number:
US Patent Application 12/336,270
Assignee:
Sandia Corporation (Albuquerque, NM)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
AC04-94AL85000
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Pfeifer, Kent B, and Rumpf, Arthur N. Ion mobility spectrometer with virtual aperture grid. United States: N. p., 2010. Web.
Pfeifer, Kent B, & Rumpf, Arthur N. Ion mobility spectrometer with virtual aperture grid. United States.
Pfeifer, Kent B, and Rumpf, Arthur N. Tue . "Ion mobility spectrometer with virtual aperture grid". United States. https://www.osti.gov/servlets/purl/1014744.
@article{osti_1014744,
title = {Ion mobility spectrometer with virtual aperture grid},
author = {Pfeifer, Kent B and Rumpf, Arthur N},
abstractNote = {An ion mobility spectrometer does not require a physical aperture grid to prevent premature ion detector response. The last electrodes adjacent to the ion collector (typically the last four or five) have an electrode pitch that is less than the width of the ion swarm and each of the adjacent electrodes is connected to a source of free charge, thereby providing a virtual aperture grid at the end of the drift region that shields the ion collector from the mirror current of the approaching ion swarm. The virtual aperture grid is less complex in assembly and function and is less sensitive to vibrations than the physical aperture grid.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {11}
}

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Works referenced in this record:

Ion Mobility Spectrometry
journal, December 1990


Evaluation of suspected interferents for TNT detection by ion mobility spectrometry
journal, March 2001


A novel electron source for negative ion mobility spectrometry
journal, June 2002


Peak shape analysis and plate theory for plasma chromatography
journal, March 1975