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Title: Pulsed helium ionization detection system

Abstract

A helium ionization detection system is provided which produces stable operation of a conventional helium ionization detector while providing improved sensitivity and linearity. Stability is improved by applying pulsed dc supply voltage across the ionization detector, thereby modifying the sampling of the detectors output current. A unique pulse generator is used to supply pulsed dc to the detector which has variable width and interval adjust features that allows up to 500 V to be applied in pulse widths ranging from about 150 nsec to about dc conditions.

Inventors:
 [1];  [1]
  1. Knoxville, TN
Issue Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
OSTI Identifier:
866419
Patent Number(s):
4705947
Assignee:
United States of America as represented by United States (Washington, DC)
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-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pulsed; helium; ionization; detection; provided; produces; stable; operation; conventional; detector; providing; improved; sensitivity; linearity; stability; applying; dc; supply; voltage; modifying; sampling; detectors; output; current; unique; pulse; generator; variable; width; interval; adjust; features; allows; 500; applied; widths; ranging; 150; nsec; conditions; supply voltage; improved sensitivity; output current; pulse generator; pulse width; ionization detector; providing improved; pulse widths; helium ionization; ionization detection; pulsed helium; stable operation; dc supply; variable width; unique pulse; /250/

Citation Formats

Ramsey, Roswitha S, and Todd, Richard A. Pulsed helium ionization detection system. United States: N. p., 1987. Web.
Ramsey, Roswitha S, & Todd, Richard A. Pulsed helium ionization detection system. United States.
Ramsey, Roswitha S, and Todd, Richard A. Thu . "Pulsed helium ionization detection system". United States. https://www.osti.gov/servlets/purl/866419.
@article{osti_866419,
title = {Pulsed helium ionization detection system},
author = {Ramsey, Roswitha S and Todd, Richard A},
abstractNote = {A helium ionization detection system is provided which produces stable operation of a conventional helium ionization detector while providing improved sensitivity and linearity. Stability is improved by applying pulsed dc supply voltage across the ionization detector, thereby modifying the sampling of the detectors output current. A unique pulse generator is used to supply pulsed dc to the detector which has variable width and interval adjust features that allows up to 500 V to be applied in pulse widths ranging from about 150 nsec to about dc conditions.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1987},
month = {1}
}

Patent:

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