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Title: Asymmetric ion trap

Patent ·
OSTI ID:871261
 [1];  [1];  [2]
  1. Richland, WA
  2. Pasco, WA
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An ion trap having two end cap electrodes disposed asymmetrically about a center of a ring electrode. The inner surface of the end cap electrodes are conformed to an asymmetric pair of equipotential lines of the harmonic formed by the application of voltages to the electrodes. The asymmetry of the end cap electrodes allows ejection of charged species through the closer of the two electrodes which in turn allows for simultaneously detecting anions and cations expelled from the ion trap through the use of two detectors charged with opposite polarity.

Research Organization:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States)
DOE Contract Number:
AC06-76RL01830
Assignee:
Battelle Memorial Institute (Richland, WA)
Patent Number(s):
US 5693941
OSTI ID:
871261
Country of Publication:
United States
Language:
English

References (2)

Simulation study of an ion cage with superimposed multipole fields journal May 1991
Detection, damping, and translating the center of the axial oscillation of a charged particle in a Penning trap with hyperbolic electrodes journal February 1984

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Related Subjects

asymmetric
trap
cap
electrodes
disposed
asymmetrically
center
electrode
inner
surface
conformed
pair
equipotential
lines
harmonic
formed
application
voltages
asymmetry
allows
ejection
charged
species
closer
simultaneously
detecting
anions
cations
expelled
detectors
opposite
polarity
charged species
opposite polarity
inner surface
cap electrodes
simultaneously detecting
electrodes disposed
equipotential lines
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