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U.S. Department of Energy
Office of Scientific and Technical Information

Pulsed field sample neutralization

Patent ·
OSTI ID:867589
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.
Research Organization:
EG & G IDAHO INC
DOE Contract Number:
AC07-76ID01570
Assignee:
United States of America as represented by United States (Washington, DC)
Patent Number(s):
US 4968888
OSTI ID:
867589
Country of Publication:
United States
Language:
English