Stepped Electric Field Detector

Metadata Updated: December 5, 2019

An apparatus and method for measuring low or trace concentrations of compounds and mixture of gases. A method and apparatus of the invention permits separating ions of different mobilities by passing them through an abrupt change or step in electric field magnitude. By using the separation method, the compounds of interest may be measured with less interference from other compounds of the gas mixture, which reduces or eliminates the need for prior separation of the components of the gas mixture. Several embodiments of the invention are described including the use of current amplifiers on one, or more, parts of the apparatus. While a single screen can provide a chamber which is divided into two regions of different electric fields, it is within the scope of the invention to include multiple screens to provide several steps in the electric field permitting it to be possible to trap and measure ions with successively higher mobilities. The gases used include halogenated compounds, including fluorocarbons, and most preferable SF.sub.6.

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Public: This dataset is intended for public access and use. License: Creative Commons Attribution

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Metadata Created Date May 20, 2015
Metadata Updated Date December 5, 2019

Metadata Source

Harvested from Commerce Non Spatial Data.json Harvest Source

Additional Metadata

Resource Type Dataset
Metadata Created Date May 20, 2015
Metadata Updated Date December 5, 2019
Publisher Department of Commerce
Unique Identifier TT-000052
Derek Parks
Maintainer Email
Public Access Level public
Bureau Code 006:48
Metadata Context
Schema Version
Catalog Describedby
Harvest Object Id f2bcc76a-98f8-4f1c-ac23-6106f0acc446
Harvest Source Id 0836a94a-b3c8-4190-a145-bddc06458b2c
Harvest Source Title Commerce Non Spatial Data.json Harvest Source
Data Last Modified 2014-06-24
Program Code 006:000
Source Datajson Identifier True
Source Hash 75d558121c71c8193e5479ded0220d3bb21961a4
Source Schema Version 1.1

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