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Title: Pulsed field sample neutralization

Abstract

An apparatus and method for alternating voltage and for varying the rate of extraction during the extraction of secondary particles, resulting in periods when either positive ions, or negative ions and electrons are extracted at varying rates. Using voltage with alternating charge during successive periods to extract particles from materials which accumulate charge opposite that being extracted causes accumulation of surface charge of opposite sign. Charge accumulation can then be adjusted to a ratio which maintains a balance of positive and negative charge emission, thus maintaining the charge neutrality of the sample.

Inventors:
 [1];  [1];  [1]
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  1. Idaho Falls, ID
Issue Date:
Research Org.:
EG & G IDAHO INC
OSTI Identifier:
867589
Patent Number(s):
4968888
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
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
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DOE Contract Number:  
AC07-76ID01570
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
pulsed; field; sample; neutralization; apparatus; method; alternating; voltage; varying; rate; extraction; secondary; particles; resulting; periods; positive; negative; electrons; extracted; rates; charge; successive; extract; materials; accumulate; opposite; causes; accumulation; surface; adjusted; ratio; maintains; balance; emission; maintaining; neutrality; surface charge; secondary particles; charge neutral; negative charge; secondary particle; alternating voltage; /250/

Citation Formats

Appelhans, Anthony D, Dahl, David A, and Delmore, James E. Pulsed field sample neutralization. United States: N. p., 1990. Web.
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Appelhans, Anthony D, Dahl, David A, & Delmore, James E. Pulsed field sample neutralization. United States.
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Appelhans, Anthony D, Dahl, David A, and Delmore, James E. Mon . "Pulsed field sample neutralization". United States. https://www.osti.gov/servlets/purl/867589.
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@article{osti_867589,
title = {Pulsed field sample neutralization},
author = {Appelhans, Anthony D and Dahl, David A and Delmore, James E},
abstractNote = {An apparatus and method for alternating voltage and for varying the rate of extraction during the extraction of secondary particles, resulting in periods when either positive ions, or negative ions and electrons are extracted at varying rates. Using voltage with alternating charge during successive periods to extract particles from materials which accumulate charge opposite that being extracted causes accumulation of surface charge of opposite sign. Charge accumulation can then be adjusted to a ratio which maintains a balance of positive and negative charge emission, thus maintaining the charge neutrality of the sample.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}
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