Pulsed field sample neutralization
Patent
·
OSTI ID:867589
- Idaho Falls, ID
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
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Related Subjects
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accumulate
accumulation
adjusted
alternating
alternating voltage
apparatus
balance
causes
charge
charge neutral
electrons
emission
extract
extracted
extraction
field
maintaining
maintains
materials
method
negative
negative charge
neutrality
neutralization
opposite
particles
periods
positive
pulsed
rate
rates
ratio
resulting
sample
secondary
secondary particle
secondary particles
successive
surface
surface charge
varying
voltage
accumulate
accumulation
adjusted
alternating
alternating voltage
apparatus
balance
causes
charge
charge neutral
electrons
emission
extract
extracted
extraction
field
maintaining
maintains
materials
method
negative
negative charge
neutrality
neutralization
opposite
particles
periods
positive
pulsed
rate
rates
ratio
resulting
sample
secondary
secondary particle
secondary particles
successive
surface
surface charge
varying
voltage