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Title: Glow discharge detector

Abstract

A highly sensitive electronic ion cell for the measurement of trace elements in He carrier gas which involves glow discharge. A constant wave (CW) glow discharge detector which is controlled through a biased resistor, can detect the change of electron density caused by impurities in the He carrier gas by many orders of magnitude larger than that caused by direct ionization or electron capture. The glow discharge detector utilizes a floating pseudo-electrode to form a probe in or near the plasma. By using this probe, the large variation of electron density due to trace amounts of impurities can be directly measured.

Inventors:
 [1];  [2]
  1. San Ramon, CA
  2. Antioch, CA
Issue Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
874769
Patent Number(s):
6457347
Assignee:
The Regents of the University of California (Oakland, CA)
Patent Classifications (CPCs):
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
glow; discharge; detector; highly; sensitive; electronic; cell; measurement; trace; elements; carrier; gas; involves; constant; wave; cw; controlled; biased; resistor; detect; change; electron; density; caused; impurities; magnitude; larger; direct; ionization; capture; utilizes; floating; pseudo-electrode; form; probe; near; plasma; variation; due; amounts; directly; measured; carrier gas; glow discharge; electron capture; /73/

Citation Formats

Koo, Jackson C, and Yu, Conrad M. Glow discharge detector. United States: N. p., 2002. Web.
Koo, Jackson C, & Yu, Conrad M. Glow discharge detector. United States.
Koo, Jackson C, and Yu, Conrad M. Tue . "Glow discharge detector". United States. https://www.osti.gov/servlets/purl/874769.
@article{osti_874769,
title = {Glow discharge detector},
author = {Koo, Jackson C and Yu, Conrad M},
abstractNote = {A highly sensitive electronic ion cell for the measurement of trace elements in He carrier gas which involves glow discharge. A constant wave (CW) glow discharge detector which is controlled through a biased resistor, can detect the change of electron density caused by impurities in the He carrier gas by many orders of magnitude larger than that caused by direct ionization or electron capture. The glow discharge detector utilizes a floating pseudo-electrode to form a probe in or near the plasma. By using this probe, the large variation of electron density due to trace amounts of impurities can be directly measured.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

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